US Core Implementation Guide
9.0.0 - STU 9 US

US Core Implementation Guide - Downloaded Version 9.0.0 See the Directory of published versions

## Terminology

Page standards status: Trial-use

This page lists all the ValueSets, CodeSystems, and ConceptMaps defined as part of the US Core Implementation Guide. For more information on using codes in US Core, see the FHIR Terminology section in the FHIR specification and the Coded Elements section in this guide.

### US Core ValueSet and CodeSystem versions

Terminology is central to US Core. Code systems and value sets change over time, independent of or due to the US Core's annual updates. These changes include adding, deprecating, or retiring code, as well as updating code definitions. In large code systems or value sets, these changes may go unnoticed; however, for smaller enumerated terminologies, they can be obvious and lead to breaking changes.

Every published version of US Core also publishes a snapshot of the latest versions of code systems and value sets, along with their expansions, at the time of publication. This snapshot of these versions can be viewed in the Expansion Parameters resource. However, US Core does not require a specific version of terminology to be used with a specific version of US Core. For example, in US Core version 6.1.0, the US Core Laboratory Test Codes link to version 6.1.0 of the ValueSet. However, its canonical URI, `http://hl7.org/fhir/us/core/ValueSet/us-core-laboratory-test-codes`, resolves to the latest published version of the valueset; in other words, it links to this more recent version of US Core's valueset. This flexibility better reflects real-world use of US Core. When implementing US Core, implementers SHOULD use the published versions or later versions of the value sets and code systems.§ In some cases, implementers MAY need to use terminology from earlier versions to preserve legacy data.§

##### Value Set Packages

In addition to the terminology published with each version of US Core, the link below provides annual value set package updates for US Core Versions 6.1.0, 8.0.1, and 9.0.0 to assist implementers who require them. These packages contain all the expanded value sets required for an implementation guide, and are based on the current code system and value set versions.

- US Core Value Set Packages

### Value Sets

Most value sets used in this guide are defined in the base FHIR specification, HL7 Terminology (THO), or the Value Set Authority Center (VSAC). However, US Core also defines several value sets and they are listed below.

Value sets in US Core and C-CDA may retain inactive codes. These codes may be useful for historical queries but are not recommended for new data. Implementers should note that some code systems exclude inactive codes from current expansions; if needed, these codes may be accessible through prior expansions via terminology services. HL7 recommends validators allow non-active codes with note on their status.

- US Core Narrative Status
- US Core Clinical Note Type
- US Core Clinical Result Observation Category
- US Core Condition Codes
- US Core Diagnostic Report Category Codes
- US Core DocumentReference Category
- US Core DocumentReference Type
- US Core Goal Codes
- US Core Laboratory Test Codes
- US Core Location Type Codes
- US Core Non Laboratory Codes
- US Core Status for Smoking Status Observation
- US Core Practitioner Role Specialty Codes
- US Core Problem or Health Concern
- US Core Procedure Codes
- US Core Screening Assessment Condition Category
- US Core Screening Assessment Observation Category
- US Core Screening Assessment Observation Maximum Category
- US Core ServiceRequest Category Codes
- US Core Simple Observation Category
- US Core Specimen Condition

#### Value Sets Used in US Core

The following table lists all the Value sets used in US Core and where they can be found. This information is also available as a csv or excel file.

Value Set Sources:

- VSAC
- FHIR
- US CORE
- PHINVADS
- THO

Row # | Value Set | Profiles Where Used | Source
--- | --- | --- | ---
1 | Common UCUM units | StructureDefinition/us-core-medicationrequest StructureDefinition/us-core-medicationdispense | FHIR
2 | ActEncounterCode | StructureDefinition/us-core-encounter | THO
3 | ActPharmacySupplyType | StructureDefinition/us-core-medicationdispense | THO
4 | ActPriority | StructureDefinition/us-core-encounter | THO
5 | ActSubstanceAdminSubstitutionCode | StructureDefinition/us-core-medicationrequest StructureDefinition/us-core-medicationdispense | THO
6 | AddressType | StructureDefinition/us-core-practitioner StructureDefinition/us-core-patient StructureDefinition/us-core-location StructureDefinition/us-core-organization | FHIR
7 | AddressUse | StructureDefinition/us-core-practitioner StructureDefinition/us-core-patient StructureDefinition/us-core-location StructureDefinition/us-core-organization | FHIR
8 | AdministrativeGender | StructureDefinition/us-core-practitioner StructureDefinition/us-core-patient StructureDefinition/us-core-relatedperson StructureDefinition/us-core-familymemberhistory | FHIR
9 | Admit source | StructureDefinition/us-core-encounter | FHIR
10 | Advance Healthcare Directive Categories LOINC | StructureDefinition/us-core-adi-documentreference | VSAC
11 | Advance Healthcare Directive Document Types Grouper | StructureDefinition/us-core-adi-documentreference | VSAC
12 | Allergen Concepts (Medications | and Environmental Substances) including refutations. | VSAC
13 | AllergyIntolerance Clinical Status Codes | StructureDefinition/us-core-allergyintolerance | FHIR
14 | AllergyIntolerance Verification Status Codes | StructureDefinition/us-core-allergyintolerance | FHIR
15 | AllergyIntoleranceCategory | StructureDefinition/us-core-allergyintolerance | FHIR
16 | AllergyIntoleranceCriticality | StructureDefinition/us-core-allergyintolerance | FHIR
17 | AllergyIntoleranceSeverity | StructureDefinition/us-core-allergyintolerance | FHIR
18 | AllergyIntoleranceType | StructureDefinition/us-core-allergyintolerance | FHIR
19 | Answer Set with Yes No and Unknowns | StructureDefinition/us-core-interpreter-needed StructureDefinition/us-core-observation-adi-documentation | VSAC
20 | Birth Sex | StructureDefinition/us-core-birthsex | VSAC
21 | Body Length Units | StructureDefinition/us-core-head-circumference StructureDefinition/us-core-body-height | FHIR
22 | Body Temperature Units | StructureDefinition/us-core-body-temperature | FHIR
23 | Body Weight Units | StructureDefinition/us-core-body-weight | FHIR
24 | CMS Place of Service Codes (POS) | ValueSet/us-core-location-type | THO
25 | CVX Vaccines Administered Vaccine Set | StructureDefinition/us-core-immunization | VSAC
26 | Care Plan Activity Kind | StructureDefinition/us-core-careplan | FHIR
27 | Care Plan Activity Outcome | StructureDefinition/us-core-careplan | FHIR
28 | Care Plan Category | StructureDefinition/us-core-careplan | FHIR
29 | Care Plan Intent | StructureDefinition/us-core-careplan | FHIR
30 | Care Team Member Function | StructureDefinition/us-core-careteam StructureDefinition/us-core-practitionerrole | VSAC
31 | Care Team category | StructureDefinition/us-core-careteam | FHIR
32 | CarePlanActivityStatus | StructureDefinition/us-core-careplan | FHIR
33 | CareTeamStatus | StructureDefinition/us-core-careteam | FHIR
34 | Codes for Immunization Site of Administration | StructureDefinition/us-core-immunization | FHIR
35 | Common Languages | StructureDefinition/us-core-specimen StructureDefinition/us-core-documentreference StructureDefinition/us-core-observation-pregnancyintent StructureDefinition/us-core-procedure StructureDefinition/us-core-observation-lab StructureDefinition/us-core-vital-signs StructureDefinition/us-core-careplan StructureDefinition/us-core-organization StructureDefinition/us-core-adi-documentreference StructureDefinition/us-core-head-circumference StructureDefinition/us-core-heart-rate StructureDefinition/us-core-practitioner StructureDefinition/us-core-practitionerrole StructureDefinition/us-core-body-height StructureDefinition/us-core-smokingstatus StructureDefinition/us-core-patient StructureDefinition/us-core-observation-clinical-result StructureDefinition/us-core-provenance StructureDefinition/us-core-body-temperature StructureDefinition/us-core-respiratory-rate StructureDefinition/us-core-questionnaireresponse StructureDefinition/us-core-condition-encounter-diagnosis StructureDefinition/us-core-condition-problems-health-concerns StructureDefinition/pediatric-weight-for-height StructureDefinition/us-core-observation-pregnancystatus StructureDefinition/us-core-medicationdispense StructureDefinition/us-core-device StructureDefinition/us-core-treatment-intervention-preference StructureDefinition/pediatric-bmi-for-age StructureDefinition/us-core-pulse-oximetry StructureDefinition/us-core-diagnosticreport-lab StructureDefinition/us-core-encounter StructureDefinition/head-occipital-frontal-circumference-percentile StructureDefinition/us-core-bmi StructureDefinition/us-core-coverage StructureDefinition/us-core-servicerequest StructureDefinition/us-core-simple-observation StructureDefinition/us-core-diagnosticreport-note StructureDefinition/us-core-medicationrequest StructureDefinition/us-core-medication StructureDefinition/us-core-care-experience-preference StructureDefinition/us-core-goal StructureDefinition/us-core-careteam StructureDefinition/us-core-observation-screening-assessment StructureDefinition/us-core-immunization StructureDefinition/us-core-relatedperson StructureDefinition/us-core-familymemberhistory StructureDefinition/us-core-body-weight StructureDefinition/us-core-observation-occupation StructureDefinition/us-core-average-blood-pressure StructureDefinition/us-core-observation-sexual-orientation StructureDefinition/us-core-observation-adi-documentation StructureDefinition/us-core-location StructureDefinition/us-core-allergyintolerance StructureDefinition/us-core-blood-pressure | FHIR
36 | Common Tags | StructureDefinition/us-core-condition-problems-health-concerns StructureDefinition/us-core-diagnosticreport-lab StructureDefinition/us-core-encounter StructureDefinition/us-core-observation-lab | FHIR
37 | CompositionStatus | StructureDefinition/us-core-adi-documentreference StructureDefinition/us-core-documentreference | FHIR
38 | Condition Category Codes | StructureDefinition/us-core-condition-problems-health-concerns StructureDefinition/us-core-condition-encounter-diagnosis | FHIR
39 | Condition Clinical Status Codes | StructureDefinition/us-core-condition-problems-health-concerns StructureDefinition/us-core-condition-encounter-diagnosis | FHIR
40 | Condition Outcome Codes | StructureDefinition/us-core-familymemberhistory | FHIR
41 | Condition Stage | StructureDefinition/us-core-condition-problems-health-concerns StructureDefinition/us-core-condition-encounter-diagnosis | FHIR
42 | Condition Stage Type | StructureDefinition/us-core-condition-problems-health-concerns StructureDefinition/us-core-condition-encounter-diagnosis | FHIR
43 | Condition/Diagnosis Severity | StructureDefinition/us-core-condition-problems-health-concerns StructureDefinition/us-core-condition-encounter-diagnosis | FHIR
44 | Condition/Problem/Diagnosis Codes | StructureDefinition/us-core-procedure | FHIR
45 | ConditionVerificationStatus | StructureDefinition/us-core-condition-problems-health-concerns StructureDefinition/us-core-condition-encounter-diagnosis | FHIR
46 | Contact entity type | StructureDefinition/us-core-organization | FHIR
47 | ContactPointSystem | StructureDefinition/us-core-practitioner StructureDefinition/us-core-patient StructureDefinition/us-core-practitionerrole StructureDefinition/us-core-organization | FHIR
48 | ContactPointUse | StructureDefinition/us-core-practitioner StructureDefinition/us-core-patient StructureDefinition/us-core-practitionerrole StructureDefinition/us-core-organization | FHIR
49 | Coverage Class Codes | StructureDefinition/us-core-coverage | FHIR
50 | Coverage Copay Type Codes | StructureDefinition/us-core-coverage | FHIR
51 | DataAbsentReason | StructureDefinition/pediatric-bmi-for-age StructureDefinition/us-core-pulse-oximetry StructureDefinition/us-core-observation-pregnancyintent StructureDefinition/head-occipital-frontal-circumference-percentile StructureDefinition/us-core-bmi StructureDefinition/us-core-observation-lab StructureDefinition/us-core-vital-signs StructureDefinition/us-core-simple-observation StructureDefinition/us-core-head-circumference StructureDefinition/us-core-heart-rate StructureDefinition/us-core-body-height StructureDefinition/us-core-smokingstatus StructureDefinition/us-core-care-experience-preference StructureDefinition/us-core-observation-clinical-result StructureDefinition/us-core-body-temperature StructureDefinition/us-core-respiratory-rate StructureDefinition/us-core-observation-screening-assessment StructureDefinition/pediatric-weight-for-height StructureDefinition/us-core-observation-pregnancystatus StructureDefinition/us-core-body-weight StructureDefinition/us-core-observation-occupation StructureDefinition/us-core-average-blood-pressure StructureDefinition/us-core-treatment-intervention-preference StructureDefinition/us-core-observation-adi-documentation StructureDefinition/us-core-observation-sexual-orientation StructureDefinition/us-core-blood-pressure | FHIR
52 | DaysOfWeek | StructureDefinition/us-core-practitionerrole StructureDefinition/us-core-location | FHIR
53 | Detailed Ethnicity Including Absence Reasons | StructureDefinition/us-core-ethnicity | VSAC
54 | Detailed race including absence reasons. | StructureDefinition/us-core-race | VSAC
55 | DeviceNameType | StructureDefinition/us-core-device | FHIR
56 | DiagnosisRole | StructureDefinition/us-core-encounter | FHIR
57 | Diagnostic Service Section Codes | StructureDefinition/us-core-diagnosticreport-note StructureDefinition/us-core-diagnosticreport-lab | FHIR
58 | DiagnosticReportStatus | StructureDefinition/us-core-diagnosticreport-note StructureDefinition/us-core-diagnosticreport-lab | FHIR
59 | Diet | StructureDefinition/us-core-encounter | FHIR
60 | Document Class Value Set | StructureDefinition/us-core-adi-documentreference StructureDefinition/us-core-documentreference | FHIR
61 | Document Type Value Set | OperationDefinition/docref | FHIR
62 | DocumentReferenceStatus | StructureDefinition/us-core-adi-documentreference StructureDefinition/us-core-documentreference | FHIR
63 | DocumentRelationshipType | StructureDefinition/us-core-adi-documentreference StructureDefinition/us-core-documentreference | FHIR
64 | DoseAndRateType | StructureDefinition/us-core-medicationrequest StructureDefinition/us-core-medicationdispense | FHIR
65 | Encounter Reason Codes | StructureDefinition/us-core-encounter | FHIR
66 | Encounter Type | StructureDefinition/us-core-encounter | VSAC
67 | EncounterLocationStatus | StructureDefinition/us-core-encounter | FHIR
68 | EncounterStatus | StructureDefinition/us-core-encounter | FHIR
69 | Ethnicity Categories | StructureDefinition/us-core-ethnicity | VSAC
70 | EventStatus | StructureDefinition/us-core-procedure | FHIR
71 | Example Coverage Financial Exception Codes | StructureDefinition/us-core-coverage | FHIR
72 | FHIR Device Types | StructureDefinition/us-core-procedure StructureDefinition/us-core-device | FHIR
73 | FHIR Specimen Collection Method | StructureDefinition/us-core-specimen | FHIR
74 | FHIRDeviceStatus | StructureDefinition/us-core-device | FHIR
75 | FHIRDeviceStatusReason | StructureDefinition/us-core-device | FHIR
76 | Facility Type Code Value Set | StructureDefinition/us-core-adi-documentreference StructureDefinition/us-core-documentreference | FHIR
77 | Family Member Value | StructureDefinition/us-core-familymemberhistory | VSAC
78 | FamilyHistoryAbsentReason | StructureDefinition/us-core-familymemberhistory | FHIR
79 | FamilyHistoryStatus | StructureDefinition/us-core-familymemberhistory | FHIR
80 | Federal Administrative Sex | StructureDefinition/us-core-individual-sex | VSAC
81 | Financial Resource Status Codes | StructureDefinition/us-core-coverage | FHIR
82 | Gender Identity | StructureDefinition/us-core-genderIdentity | VSAC
83 | Goal achievement status | StructureDefinition/us-core-goal | FHIR
84 | Goal category | StructureDefinition/us-core-goal | FHIR
85 | Goal priority | StructureDefinition/us-core-goal | FHIR
86 | Goal start event | StructureDefinition/us-core-goal | FHIR
87 | GoalLifecycleStatus | StructureDefinition/us-core-goal | FHIR
88 | HL7 ValueSet of Format Codes for use with Document Sharing | StructureDefinition/us-core-adi-documentreference StructureDefinition/us-core-documentreference | THO
89 | Healthcare Provider Taxonomy | ValueSet/us-core-practitionerrole-specialty | VSAC
90 | Healthcare Service Location Type Combined | ValueSet/us-core-location-type | VSAC
91 | IdentifierType | StructureDefinition/us-core-practitioner StructureDefinition/us-core-patient StructureDefinition/us-core-encounter StructureDefinition/us-core-coverage StructureDefinition/us-core-organization | FHIR
92 | IdentifierUse | StructureDefinition/us-core-practitioner StructureDefinition/us-core-patient StructureDefinition/us-core-encounter StructureDefinition/us-core-coverage StructureDefinition/us-core-organization | FHIR
93 | Immunization Function Codes | StructureDefinition/us-core-immunization | FHIR
94 | Immunization Funding Source | StructureDefinition/us-core-immunization | FHIR
95 | Immunization Origin Codes | StructureDefinition/us-core-immunization | FHIR
96 | Immunization Program Eligibility | StructureDefinition/us-core-immunization | FHIR
97 | Immunization Reason Codes | StructureDefinition/us-core-immunization | FHIR
98 | Immunization Route Codes | StructureDefinition/us-core-immunization | FHIR
99 | Immunization Status Codes | StructureDefinition/us-core-immunization | FHIR
100 | Immunization Status Reason Codes | StructureDefinition/us-core-immunization | FHIR
101 | Immunization Subpotent Reason | StructureDefinition/us-core-immunization | FHIR
102 | Immunization Target Disease Codes | StructureDefinition/us-core-immunization | FHIR
103 | Industry NAICS Detail (ODH) | StructureDefinition/us-core-observation-occupation | PHINVADS
104 | Information Source for Medication Adherence | StructureDefinition/us-core-medication-adherence | VSAC
105 | LOINC Codes | StructureDefinition/us-core-care-experience-preference StructureDefinition/us-core-goal StructureDefinition/us-core-observation-pregnancyintent StructureDefinition/us-core-observation-clinical-result StructureDefinition/us-core-observation-lab StructureDefinition/us-core-observation-screening-assessment StructureDefinition/us-core-simple-observation StructureDefinition/us-core-observation-pregnancystatus StructureDefinition/us-core-observation-occupation StructureDefinition/us-core-average-blood-pressure StructureDefinition/us-core-treatment-intervention-preference StructureDefinition/us-core-observation-sexual-orientation StructureDefinition/us-core-observation-adi-documentation StructureDefinition/us-core-smokingstatus | FHIR
106 | Languages | StructureDefinition/us-core-patient | THO
107 | LinkType | StructureDefinition/us-core-patient | FHIR
108 | Location type | StructureDefinition/us-core-encounter StructureDefinition/us-core-location | FHIR
109 | LocationMode | StructureDefinition/us-core-location | FHIR
110 | LocationStatus | StructureDefinition/us-core-location | FHIR
111 | Manifestation and Symptom Codes | StructureDefinition/us-core-condition-problems-health-concerns StructureDefinition/us-core-condition-encounter-diagnosis | FHIR
112 | MaritalStatus | StructureDefinition/us-core-patient | FHIR
113 | Medication status codes | StructureDefinition/us-core-medication | FHIR
114 | Medication Adherence | StructureDefinition/us-core-medication-adherence | VSAC
115 | Medication Clinical Drug | StructureDefinition/us-core-medicationrequest StructureDefinition/us-core-medication StructureDefinition/us-core-medicationdispense | VSAC
116 | Medication dispense category codes | StructureDefinition/us-core-medicationdispense | FHIR
117 | Medication dispense performer function codes | StructureDefinition/us-core-medicationdispense | FHIR
118 | Medication dispense status codes | StructureDefinition/us-core-medicationdispense | FHIR
119 | Medication dispense status reason codes | StructureDefinition/us-core-medicationdispense | FHIR
120 | Medication request category codes | StructureDefinition/us-core-medicationrequest | FHIR
121 | Medication request course of therapy codes | StructureDefinition/us-core-medicationrequest | FHIR
122 | Medication request intent | StructureDefinition/us-core-medicationrequest | FHIR
123 | Medication request status reason codes | StructureDefinition/us-core-medicationrequest | FHIR
124 | Medicationrequest status | StructureDefinition/us-core-medicationrequest | FHIR
125 | MimeType | StructureDefinition/us-core-adi-documentreference StructureDefinition/us-core-documentreference | FHIR
126 | NameUse | StructureDefinition/us-core-practitioner StructureDefinition/us-core-patient | FHIR
127 | Observation Category Codes | StructureDefinition/pediatric-bmi-for-age StructureDefinition/us-core-pulse-oximetry StructureDefinition/us-core-observation-pregnancyintent StructureDefinition/us-core-observation-clinical-result StructureDefinition/us-core-observation-lab StructureDefinition/head-occipital-frontal-circumference-percentile StructureDefinition/us-core-bmi StructureDefinition/us-core-observation-screening-assessment StructureDefinition/us-core-body-temperature StructureDefinition/us-core-respiratory-rate StructureDefinition/us-core-vital-signs StructureDefinition/us-core-heart-rate StructureDefinition/us-core-head-circumference StructureDefinition/pediatric-weight-for-height StructureDefinition/us-core-observation-pregnancystatus StructureDefinition/us-core-body-weight StructureDefinition/us-core-observation-occupation StructureDefinition/us-core-average-blood-pressure StructureDefinition/us-core-observation-sexual-orientation StructureDefinition/us-core-body-height StructureDefinition/us-core-smokingstatus StructureDefinition/us-core-blood-pressure | FHIR
128 | Observation Interpretation Codes | StructureDefinition/pediatric-bmi-for-age StructureDefinition/us-core-pulse-oximetry StructureDefinition/us-core-observation-pregnancyintent StructureDefinition/head-occipital-frontal-circumference-percentile StructureDefinition/us-core-bmi StructureDefinition/us-core-observation-lab StructureDefinition/us-core-vital-signs StructureDefinition/us-core-simple-observation StructureDefinition/us-core-head-circumference StructureDefinition/us-core-heart-rate StructureDefinition/us-core-body-height StructureDefinition/us-core-smokingstatus StructureDefinition/us-core-care-experience-preference StructureDefinition/us-core-observation-clinical-result StructureDefinition/us-core-body-temperature StructureDefinition/us-core-respiratory-rate StructureDefinition/us-core-observation-screening-assessment StructureDefinition/pediatric-weight-for-height StructureDefinition/us-core-observation-pregnancystatus StructureDefinition/us-core-body-weight StructureDefinition/us-core-observation-occupation StructureDefinition/us-core-average-blood-pressure StructureDefinition/us-core-treatment-intervention-preference StructureDefinition/us-core-observation-adi-documentation StructureDefinition/us-core-observation-sexual-orientation StructureDefinition/us-core-blood-pressure | FHIR
129 | Observation Methods | StructureDefinition/pediatric-bmi-for-age StructureDefinition/us-core-pulse-oximetry StructureDefinition/us-core-observation-pregnancyintent StructureDefinition/head-occipital-frontal-circumference-percentile StructureDefinition/us-core-bmi StructureDefinition/us-core-observation-lab StructureDefinition/us-core-vital-signs StructureDefinition/us-core-simple-observation StructureDefinition/us-core-head-circumference StructureDefinition/us-core-heart-rate StructureDefinition/us-core-body-height StructureDefinition/us-core-smokingstatus StructureDefinition/us-core-care-experience-preference StructureDefinition/us-core-observation-clinical-result StructureDefinition/us-core-body-temperature StructureDefinition/us-core-respiratory-rate StructureDefinition/us-core-observation-screening-assessment StructureDefinition/pediatric-weight-for-height StructureDefinition/us-core-observation-pregnancystatus StructureDefinition/us-core-body-weight StructureDefinition/us-core-observation-occupation StructureDefinition/us-core-average-blood-pressure StructureDefinition/us-core-treatment-intervention-preference StructureDefinition/us-core-observation-adi-documentation StructureDefinition/us-core-observation-sexual-orientation StructureDefinition/us-core-blood-pressure | FHIR
130 | Observation Reference Range Applies To Codes | StructureDefinition/pediatric-bmi-for-age StructureDefinition/us-core-pulse-oximetry StructureDefinition/us-core-observation-pregnancyintent StructureDefinition/head-occipital-frontal-circumference-percentile StructureDefinition/us-core-bmi StructureDefinition/us-core-observation-lab StructureDefinition/us-core-vital-signs StructureDefinition/us-core-simple-observation StructureDefinition/us-core-head-circumference StructureDefinition/us-core-heart-rate StructureDefinition/us-core-body-height StructureDefinition/us-core-smokingstatus StructureDefinition/us-core-care-experience-preference StructureDefinition/us-core-observation-clinical-result StructureDefinition/us-core-body-temperature StructureDefinition/us-core-respiratory-rate StructureDefinition/us-core-observation-screening-assessment StructureDefinition/pediatric-weight-for-height StructureDefinition/us-core-observation-pregnancystatus StructureDefinition/us-core-body-weight StructureDefinition/us-core-observation-occupation StructureDefinition/us-core-average-blood-pressure StructureDefinition/us-core-treatment-intervention-preference StructureDefinition/us-core-observation-adi-documentation StructureDefinition/us-core-observation-sexual-orientation StructureDefinition/us-core-blood-pressure | FHIR
131 | Observation Reference Range Meaning Codes | StructureDefinition/pediatric-bmi-for-age StructureDefinition/us-core-pulse-oximetry StructureDefinition/us-core-observation-pregnancyintent StructureDefinition/head-occipital-frontal-circumference-percentile StructureDefinition/us-core-bmi StructureDefinition/us-core-observation-lab StructureDefinition/us-core-vital-signs StructureDefinition/us-core-simple-observation StructureDefinition/us-core-head-circumference StructureDefinition/us-core-heart-rate StructureDefinition/us-core-body-height StructureDefinition/us-core-smokingstatus StructureDefinition/us-core-care-experience-preference StructureDefinition/us-core-observation-clinical-result StructureDefinition/us-core-body-temperature StructureDefinition/us-core-respiratory-rate StructureDefinition/us-core-observation-screening-assessment StructureDefinition/pediatric-weight-for-height StructureDefinition/us-core-observation-pregnancystatus StructureDefinition/us-core-body-weight StructureDefinition/us-core-observation-occupation StructureDefinition/us-core-average-blood-pressure StructureDefinition/us-core-treatment-intervention-preference StructureDefinition/us-core-observation-adi-documentation StructureDefinition/us-core-observation-sexual-orientation StructureDefinition/us-core-blood-pressure | FHIR
132 | ObservationStatus | StructureDefinition/pediatric-bmi-for-age StructureDefinition/us-core-pulse-oximetry StructureDefinition/us-core-observation-pregnancyintent StructureDefinition/head-occipital-frontal-circumference-percentile StructureDefinition/us-core-bmi StructureDefinition/us-core-observation-lab StructureDefinition/us-core-vital-signs StructureDefinition/us-core-simple-observation StructureDefinition/us-core-head-circumference StructureDefinition/us-core-heart-rate StructureDefinition/us-core-body-height StructureDefinition/us-core-care-experience-preference StructureDefinition/us-core-observation-clinical-result StructureDefinition/us-core-body-temperature StructureDefinition/us-core-respiratory-rate StructureDefinition/us-core-observation-screening-assessment StructureDefinition/pediatric-weight-for-height StructureDefinition/us-core-observation-pregnancystatus StructureDefinition/us-core-body-weight StructureDefinition/us-core-observation-occupation StructureDefinition/us-core-average-blood-pressure StructureDefinition/us-core-treatment-intervention-preference StructureDefinition/us-core-observation-adi-documentation StructureDefinition/us-core-observation-sexual-orientation StructureDefinition/us-core-blood-pressure | FHIR
133 | Occupation ONETSOC Detail (ODH) | StructureDefinition/us-core-observation-occupation | PHINVADS
134 | Organization type | StructureDefinition/us-core-organization | FHIR
135 | Participant Roles | StructureDefinition/us-core-servicerequest | FHIR
136 | Participant type | StructureDefinition/us-core-encounter | FHIR
137 | Patient Contact Relationship | StructureDefinition/us-core-patient | FHIR
138 | Payer Type | StructureDefinition/us-core-coverage | VSAC
139 | Personal And Legal Relationship Role Type | StructureDefinition/us-core-relatedperson | VSAC
140 | Practice Setting Code Value Set | StructureDefinition/us-core-adi-documentreference ValueSet/us-core-practitionerrole-specialty StructureDefinition/us-core-documentreference | FHIR
141 | Pregnancy Intention | StructureDefinition/us-core-observation-pregnancyintent | VSAC
142 | Pregnancy Status Observation | StructureDefinition/us-core-observation-pregnancystatus | VSAC
143 | Procedure Category Codes (SNOMED CT) | StructureDefinition/us-core-procedure | FHIR
144 | Procedure Codes (SNOMED CT) | StructureDefinition/us-core-careplan | FHIR
145 | Procedure Device Action Codes | StructureDefinition/us-core-procedure | FHIR
146 | Procedure Follow up Codes (SNOMED CT) | StructureDefinition/us-core-procedure | FHIR
147 | Procedure Not Performed Reason (SNOMED-CT) | StructureDefinition/us-core-procedure | FHIR
148 | Procedure Outcome Codes (SNOMED CT) | StructureDefinition/us-core-procedure | FHIR
149 | Procedure Performer Role Codes | StructureDefinition/us-core-medicationrequest StructureDefinition/us-core-procedure | FHIR
150 | Provenance activity type | StructureDefinition/us-core-provenance | FHIR
151 | Provenance participant type | StructureDefinition/us-core-provenance | THO
152 | ProvenanceEntityRole | StructureDefinition/us-core-provenance | FHIR
153 | PurposeOfUse | StructureDefinition/us-core-provenance | THO
154 | QuantityComparator | StructureDefinition/pediatric-bmi-for-age StructureDefinition/us-core-pulse-oximetry StructureDefinition/head-occipital-frontal-circumference-percentile StructureDefinition/us-core-bmi StructureDefinition/us-core-body-temperature StructureDefinition/us-core-respiratory-rate StructureDefinition/us-core-heart-rate StructureDefinition/us-core-head-circumference StructureDefinition/pediatric-weight-for-height StructureDefinition/us-core-body-weight StructureDefinition/us-core-average-blood-pressure StructureDefinition/us-core-body-height StructureDefinition/us-core-blood-pressure | FHIR
155 | Questionnaire Answer Codes | StructureDefinition/us-core-questionnaireresponse | FHIR
156 | QuestionnaireResponseStatus | StructureDefinition/us-core-questionnaireresponse | FHIR
157 | Race Categories | StructureDefinition/us-core-race | VSAC
158 | Request priority | StructureDefinition/us-core-medicationrequest StructureDefinition/us-core-servicerequest | FHIR
159 | RequestIntent | StructureDefinition/us-core-servicerequest | FHIR
160 | RequestStatus | StructureDefinition/us-core-careplan StructureDefinition/us-core-servicerequest | FHIR
161 | ResourceType | StructureDefinition/us-core-provenance StructureDefinition/us-core-questionnaireresponse | FHIR
162 | Route of Administration of Therapeutic Agents | StructureDefinition/us-core-medicationrequest StructureDefinition/us-core-medicationdispense | VSAC
163 | SNOMED CT Additional Dosage Instructions | StructureDefinition/us-core-medicationrequest StructureDefinition/us-core-medicationdispense | FHIR
164 | SNOMED CT Administration Method Codes | StructureDefinition/us-core-medicationrequest StructureDefinition/us-core-medicationdispense | FHIR
165 | SNOMED CT Anatomical Structure for Administration Site Codes | StructureDefinition/us-core-medicationrequest StructureDefinition/us-core-medicationdispense | FHIR
166 | SNOMED CT Body Structures | StructureDefinition/us-core-specimen StructureDefinition/pediatric-bmi-for-age StructureDefinition/us-core-pulse-oximetry StructureDefinition/us-core-observation-pregnancyintent StructureDefinition/us-core-procedure StructureDefinition/head-occipital-frontal-circumference-percentile StructureDefinition/us-core-bmi StructureDefinition/us-core-observation-lab StructureDefinition/us-core-vital-signs StructureDefinition/us-core-servicerequest StructureDefinition/us-core-simple-observation StructureDefinition/us-core-head-circumference StructureDefinition/us-core-heart-rate StructureDefinition/us-core-body-height StructureDefinition/us-core-smokingstatus StructureDefinition/us-core-care-experience-preference StructureDefinition/us-core-observation-clinical-result StructureDefinition/us-core-body-temperature StructureDefinition/us-core-respiratory-rate StructureDefinition/us-core-observation-screening-assessment StructureDefinition/us-core-condition-encounter-diagnosis StructureDefinition/us-core-condition-problems-health-concerns StructureDefinition/pediatric-weight-for-height StructureDefinition/us-core-observation-pregnancystatus StructureDefinition/us-core-body-weight StructureDefinition/us-core-observation-occupation StructureDefinition/us-core-average-blood-pressure StructureDefinition/us-core-treatment-intervention-preference StructureDefinition/us-core-observation-adi-documentation StructureDefinition/us-core-observation-sexual-orientation StructureDefinition/us-core-blood-pressure | FHIR
167 | SNOMED CT Clinical Findings | StructureDefinition/us-core-diagnosticreport-note StructureDefinition/us-core-diagnosticreport-lab StructureDefinition/us-core-careteam StructureDefinition/us-core-goal StructureDefinition/us-core-careplan StructureDefinition/us-core-allergyintolerance StructureDefinition/us-core-familymemberhistory | FHIR
168 | SNOMED CT Form Codes | StructureDefinition/us-core-medication | FHIR
169 | SNOMED CT Medication As Needed Reason Codes | StructureDefinition/us-core-medicationrequest StructureDefinition/us-core-medicationdispense StructureDefinition/us-core-servicerequest | FHIR
170 | SNOMED CT Medication Codes | StructureDefinition/us-core-careplan | FHIR
171 | SNOMED CT Route Codes | StructureDefinition/us-core-allergyintolerance | FHIR
172 | Screening and Assessment Survey Codes | StructureDefinition/us-core-observation-screening-assessment | VSAC
173 | SecurityLabels | StructureDefinition/us-core-adi-documentreference StructureDefinition/us-core-condition-problems-health-concerns StructureDefinition/us-core-diagnosticreport-lab StructureDefinition/us-core-documentreference StructureDefinition/us-core-encounter StructureDefinition/us-core-observation-lab | FHIR
174 | SecurityRoleType | StructureDefinition/us-core-provenance | FHIR
175 | Service Request Category Codes | ValueSet/us-core-servicerequest-category StructureDefinition/us-core-servicerequest | FHIR
176 | Service Request Order Details Codes | StructureDefinition/us-core-servicerequest | FHIR
177 | Service type | StructureDefinition/us-core-encounter | FHIR
178 | ServiceDeliveryLocationRoleType | ValueSet/us-core-location-type StructureDefinition/us-core-servicerequest | THO
179 | Sex | StructureDefinition/us-core-sex | VSAC
180 | Sexual Orientation Including nulls and Data Absent Reason | StructureDefinition/us-core-observation-sexual-orientation | VSAC
181 | Smoking Status Type | StructureDefinition/us-core-smokingstatus | VSAC
182 | Smoking status comprehensive | StructureDefinition/us-core-smokingstatus | VSAC
183 | Special arrangements | StructureDefinition/us-core-encounter | FHIR
184 | Special courtesy | StructureDefinition/us-core-encounter | FHIR
185 | Specimen Condition SCT | ValueSet/us-core-specimen-condition | VSAC
186 | Specimen Container Type | StructureDefinition/us-core-specimen | FHIR
187 | Specimen processing procedure | StructureDefinition/us-core-specimen | FHIR
188 | Specimen type | StructureDefinition/us-core-specimen | VSAC
189 | SpecimenStatus | StructureDefinition/us-core-specimen | FHIR
190 | SubscriberPolicyholder Relationship Codes | StructureDefinition/us-core-coverage | FHIR
191 | Substance Code | StructureDefinition/us-core-allergyintolerance | FHIR
192 | SubstanceAdminSubstitutionReason | StructureDefinition/us-core-medicationrequest StructureDefinition/us-core-medicationdispense | THO
193 | TribalEntityUS | StructureDefinition/us-core-tribal-affiliation | THO
194 | UDIEntryType | StructureDefinition/us-core-device | FHIR
195 | US Core Clinical Note Type | StructureDefinition/us-core-documentreference | US CORE
196 | US Core Clinical Result Observation Category | StructureDefinition/us-core-observation-clinical-result StructureDefinition/us-core-observation-lab | US CORE
197 | US Core Condition Codes | StructureDefinition/us-core-condition-problems-health-concerns StructureDefinition/us-core-medicationrequest StructureDefinition/us-core-procedure StructureDefinition/us-core-servicerequest StructureDefinition/us-core-familymemberhistory StructureDefinition/us-core-condition-encounter-diagnosis | US CORE
198 | US Core Diagnostic Report Category Codes | StructureDefinition/us-core-diagnosticreport-note | US CORE
199 | US Core DocumentReference Category | StructureDefinition/us-core-documentreference | US CORE
200 | US Core DocumentReference Type | StructureDefinition/us-core-documentreference | US CORE
201 | US Core Goal Codes | StructureDefinition/us-core-goal | US CORE
202 | US Core Laboratory Test Codes | StructureDefinition/us-core-diagnosticreport-lab StructureDefinition/us-core-observation-lab | US CORE
203 | US Core Location Type Codes | StructureDefinition/us-core-location | US CORE
204 | US Core Narrative Status | StructureDefinition/us-core-careplan | US CORE
205 | US Core Non Laboratory Codes | StructureDefinition/us-core-diagnosticreport-note | US CORE
206 | US Core Practitioner Role Specialty Codes | StructureDefinition/us-core-practitionerrole | US CORE
207 | US Core Problem or Health Concern | StructureDefinition/us-core-condition-problems-health-concerns | US CORE
208 | US Core Procedure Codes | StructureDefinition/us-core-procedure StructureDefinition/us-core-servicerequest | US CORE
209 | US Core Screening Assessment Condition Category | StructureDefinition/us-core-condition-problems-health-concerns | US CORE
210 | US Core Screening Assessment Observation Category | StructureDefinition/us-core-observation-screening-assessment | US CORE
211 | US Core Screening Assessment Observation Maximum Category | StructureDefinition/us-core-observation-screening-assessment | US CORE
212 | US Core ServiceRequest Category Codes | StructureDefinition/us-core-servicerequest | US CORE
213 | US Core Simple Observation Category | StructureDefinition/us-core-condition-problems-health-concerns StructureDefinition/us-core-care-experience-preference StructureDefinition/us-core-treatment-intervention-preference StructureDefinition/us-core-observation-adi-documentation StructureDefinition/us-core-simple-observation | US CORE
214 | US Core Specimen Condition | StructureDefinition/us-core-specimen | US CORE
215 | US Core Status for Smoking Status Observation | StructureDefinition/us-core-smokingstatus | US CORE
216 | USEncounterDischargeDisposition | StructureDefinition/us-core-encounter | THO
217 | USPS Two Letter Alphabetic Codes | StructureDefinition/us-core-practitioner StructureDefinition/us-core-patient StructureDefinition/us-core-location StructureDefinition/us-core-jurisdiction StructureDefinition/us-core-organization | THO
218 | UnitsOfMeasureCaseSensitive | StructureDefinition/us-core-smokingstatus | THO
219 | Vital Sign Result Type | StructureDefinition/pediatric-bmi-for-age StructureDefinition/us-core-pulse-oximetry StructureDefinition/head-occipital-frontal-circumference-percentile StructureDefinition/us-core-bmi StructureDefinition/us-core-body-temperature StructureDefinition/us-core-respiratory-rate StructureDefinition/us-core-vital-signs StructureDefinition/us-core-heart-rate StructureDefinition/us-core-head-circumference StructureDefinition/pediatric-weight-for-height StructureDefinition/us-core-body-weight StructureDefinition/us-core-body-height StructureDefinition/us-core-blood-pressure | VSAC
220 | Vital Signs Units | StructureDefinition/pediatric-bmi-for-age StructureDefinition/us-core-pulse-oximetry StructureDefinition/head-occipital-frontal-circumference-percentile StructureDefinition/us-core-bmi StructureDefinition/us-core-body-temperature StructureDefinition/us-core-respiratory-rate StructureDefinition/us-core-vital-signs StructureDefinition/us-core-heart-rate StructureDefinition/us-core-head-circumference StructureDefinition/pediatric-weight-for-height StructureDefinition/us-core-body-weight StructureDefinition/us-core-body-height StructureDefinition/us-core-blood-pressure | FHIR
221 | hl7VS-additivePreservative | StructureDefinition/us-core-specimen | THO
222 | hl7VS-bedStatus | StructureDefinition/us-core-location | THO
223 | hl7VS-re-admissionIndicator | StructureDefinition/us-core-encounter | THO
224 | hl7VS-relevantClincialInformation | StructureDefinition/us-core-specimen | THO
225 | hl7VS-specimenCondition | ValueSet/us-core-specimen-condition | THO
226 | v2 table 0360 | FHIR Value set/code system definition for HL7 v2 table 0360 ver 2.9 ( Degree/License/Certificate) | THO
227 | v3 Code System ActCode | StructureDefinition/us-core-adi-documentreference StructureDefinition/us-core-documentreference | THO

### Code Systems

See the FHIR terminology section for a complete discussion on code systems and a list of code system names used in FHIR. Most code systems used in this guide are defined in the base FHIR specification or HL7 Terminology (THO). However, the following code systems are unique to this guide and not listed in the base FHIR specification. If a URI is listed here, it SHALL be used in the US Core profiles to identify the code system in preference to any other code system URI.

#### US Core Defined Code Systems

- US Core CarePlan Category Extension Codes
- US Core Category
- US Core Condition Category Extension Codes
- US Core DocumentReferences Category Codes

#### Code System Used in US Core

The following table lists all the CodeSystems used in US Core and where they can be found. This information is also available as a csv or excel file.

Code System Sources:

- FHIR
- US CORE
- THO
- SNOMED
- LOINC
- UCUM
- CDC
- Code systems published by other standards organizations

Row # | Code System | Code System URI | Value Sets Where Used | Source
--- | --- | --- | --- | ---
1 | AHA NUBC Patient Discharge Status Codes | `https://www.nubc.org/CodeSystem/PatDischargeStatus` | ValueSet/v3-USEncounterDischargeDisposition | Other
2 | ActCode | `http://terminology.hl7.org/CodeSystem/v3-ActCode` | ValueSet/v3-ActPharmacySupplyType ValueSet/v3-ActCode ValueSet/provenance-activity-type ValueSet/v3-ActEncounterCode | THO
3 | ActPriority | `http://terminology.hl7.org/CodeSystem/v3-ActPriority` | ValueSet/v3-ActPriority | THO
4 | ActReason | `http://terminology.hl7.org/CodeSystem/v3-ActReason` | ValueSet/immunization-status-reason ValueSet/v3-PurposeOfUse ValueSet/v3-SubstanceAdminSubstitutionReason | THO
5 | ActSite | `http://terminology.hl7.org/CodeSystem/v3-ActSite` | ValueSet/immunization-site | THO
6 | AddressType | `http://hl7.org/fhir/address-type` | ValueSet/address-type | FHIR
7 | AddressUse | `http://hl7.org/fhir/address-use` | ValueSet/address-use | FHIR
8 | AdministrativeGender | `http://hl7.org/fhir/administrative-gender` | ValueSet/administrative-gender | FHIR
9 | Admit source | `http://terminology.hl7.org/CodeSystem/admit-source` | ValueSet/encounter-admit-source | THO
10 | Allergy Intolerance Category | `http://hl7.org/fhir/allergy-intolerance-category` | ValueSet/allergy-intolerance-category | FHIR
11 | Allergy Intolerance Criticality | `http://hl7.org/fhir/allergy-intolerance-criticality` | ValueSet/allergy-intolerance-criticality | FHIR
12 | Allergy Intolerance Severity | `http://hl7.org/fhir/reaction-event-severity` | ValueSet/reaction-event-severity | FHIR
13 | Allergy Intolerance Type | `http://hl7.org/fhir/allergy-intolerance-type` | ValueSet/allergy-intolerance-type | FHIR
14 | AllergyIntolerance Clinical Status Codes | `http://terminology.hl7.org/CodeSystem/allergyintolerance-clinical` | ValueSet/allergyintolerance-clinical | THO
15 | AllergyIntolerance Verification Status | `http://terminology.hl7.org/CodeSystem/allergyintolerance-verification` | ValueSet/allergyintolerance-verification | THO
16 | Care Team Status | `http://hl7.org/fhir/care-team-status` | ValueSet/care-team-status | FHIR
17 | CarePlanActivityStatus | `http://hl7.org/fhir/care-plan-activity-status` | ValueSet/care-plan-activity-status | FHIR
18 | Code on Dental Procedures and Nomenclature | `http://www.ada.org/cdt` | ValueSet/us-core-procedure-code | Other
19 | Common Tags | `http://terminology.hl7.org/CodeSystem/common-tags` | ValueSet/common-tags | THO
20 | Composition Status | `http://hl7.org/fhir/composition-status` | ValueSet/composition-status | FHIR
21 | Condition Category Codes | `http://terminology.hl7.org/CodeSystem/condition-category` | ValueSet/condition-category ValueSet/us-core-problem-or-health-concern | THO
22 | Condition Clinical Status Codes | `http://terminology.hl7.org/CodeSystem/condition-clinical` | ValueSet/condition-clinical | THO
23 | ConditionVerificationStatus | `http://terminology.hl7.org/CodeSystem/condition-ver-status` | ValueSet/condition-ver-status | THO
24 | Contact entity type | `http://terminology.hl7.org/CodeSystem/contactentity-type` | ValueSet/contactentity-type | THO
25 | ContactPointSystem | `http://hl7.org/fhir/contact-point-system` | ValueSet/contact-point-system | FHIR
26 | ContactPointUse | `http://hl7.org/fhir/contact-point-use` | ValueSet/contact-point-use | FHIR
27 | Contract Signer Type Codes | `http://terminology.hl7.org/CodeSystem/contractsignertypecodes` | ValueSet/security-role-type | THO
28 | Coverage Class Codes | `http://terminology.hl7.org/CodeSystem/coverage-class` | ValueSet/coverage-class | THO
29 | Coverage Copay Type Codes | `http://terminology.hl7.org/CodeSystem/coverage-copay-type` | ValueSet/coverage-copay-type | THO
30 | Current Procedural Terminology (CPT®) | `http://www.ama-assn.org/go/cpt` | ValueSet/us-core-procedure-code | Other
31 | DICOM Controlled Terminology | `http://dicom.nema.org/resources/ontology/DCM` | ValueSet/security-role-type | Other
32 | DataAbsentReason | `http://terminology.hl7.org/CodeSystem/data-absent-reason` | ValueSet/data-absent-reason | THO
33 | DataOperation | `http://terminology.hl7.org/CodeSystem/v3-DataOperation` | ValueSet/provenance-activity-type | THO
34 | Days Of Week | `http://hl7.org/fhir/days-of-week` | ValueSet/days-of-week | FHIR
35 | Device Name Type | `http://hl7.org/fhir/device-nametype` | ValueSet/device-nametype | FHIR
36 | Diagnosis Role | `http://terminology.hl7.org/CodeSystem/diagnosis-role` | ValueSet/diagnosis-role | THO
37 | Diagnostic Report Status | `http://hl7.org/fhir/diagnostic-report-status` | ValueSet/diagnostic-report-status | FHIR
38 | Diet | `http://terminology.hl7.org/CodeSystem/diet` | ValueSet/encounter-diet | THO
39 | Document Relationship Type | `http://hl7.org/fhir/document-relationship-type` | ValueSet/document-relationship-type | FHIR
40 | DocumentCompletion | `http://terminology.hl7.org/CodeSystem/v3-DocumentCompletion` | ValueSet/provenance-activity-type | THO
41 | DocumentReferenceStatus | `http://hl7.org/fhir/document-reference-status` | ValueSet/document-reference-status | FHIR
42 | DoseAndRateType | `http://terminology.hl7.org/CodeSystem/dose-rate-type` | ValueSet/dose-rate-type | THO
43 | Encounter Location Status | `http://hl7.org/fhir/encounter-location-status` | ValueSet/encounter-location-status | FHIR
44 | Encounter Status | `http://hl7.org/fhir/encounter-status` | ValueSet/encounter-status | FHIR
45 | EncounterSpecialCourtesy | `http://terminology.hl7.org/CodeSystem/v3-EncounterSpecialCourtesy` | ValueSet/encounter-special-courtesy | THO
46 | EventStatus | `http://hl7.org/fhir/event-status` | ValueSet/immunization-status ValueSet/event-status | FHIR
47 | Example Coverage Financial Exception Codes | `http://terminology.hl7.org/CodeSystem/ex-coverage-financial-exception` | ValueSet/coverage-financial-exception | THO
48 | FHIR Device Status | `http://hl7.org/fhir/device-status` | ValueSet/device-status | FHIR
49 | FHIRDeviceStatusReason | `http://terminology.hl7.org/CodeSystem/device-status-reason` | ValueSet/device-status-reason | THO
50 | Family History Status | `http://hl7.org/fhir/history-status` | ValueSet/history-status | FHIR
51 | FamilyHistoryAbsentReason | `http://terminology.hl7.org/CodeSystem/history-absent-reason` | ValueSet/history-absent-reason | THO
52 | Financial Resource Status Codes | `http://hl7.org/fhir/fm-status` | ValueSet/fm-status | FHIR
53 | Goal Lifecycle Status | `http://hl7.org/fhir/goal-status` | ValueSet/goal-status | FHIR
54 | Goal achievement status | `http://terminology.hl7.org/CodeSystem/goal-achievement` | ValueSet/goal-achievement | THO
55 | Goal category | `http://terminology.hl7.org/CodeSystem/goal-category` | ValueSet/goal-category | THO
56 | Goal priority | `http://terminology.hl7.org/CodeSystem/goal-priority` | ValueSet/goal-priority | THO
57 | HL7 Document Format Codes | `http://terminology.hl7.org/CodeSystem/v3-HL7DocumentFormatCodes` | ValueSet/v3-HL7FormatCodes | THO
58 | Healthcare Common Procedure Coding System (HCPCS) level II alphanumeric codes | `http://www.cms.gov/Medicare/Coding/HCPCSReleaseCodeSets` | ValueSet/us-core-procedure-code | Other
59 | ICD-10 Procedure Codes | `http://www.cms.gov/Medicare/Coding/ICD10` | ValueSet/us-core-procedure-code | Other
60 | ICD-9-CM (procedure codes) | `http://hl7.org/fhir/sid/icd-9-cm` | ValueSet/us-core-condition-code | CDC
61 | IHE Format Code set for use with Document Sharing | `http://ihe.net/fhir/ihe.formatcode.fhir/CodeSystem/formatcode` | ValueSet/v3-HL7FormatCodes | Other
62 | IdentifierUse | `http://hl7.org/fhir/identifier-use` | ValueSet/identifier-use | FHIR
63 | Immunization Funding Source | `http://terminology.hl7.org/CodeSystem/immunization-funding-source` | ValueSet/immunization-funding-source | THO
64 | Immunization Origin Codes | `http://terminology.hl7.org/CodeSystem/immunization-origin` | ValueSet/immunization-origin | THO
65 | Immunization Program Eligibility | `http://terminology.hl7.org/CodeSystem/immunization-program-eligibility` | ValueSet/immunization-program-eligibility | THO
66 | Immunization Subpotent Reason | `http://terminology.hl7.org/CodeSystem/immunization-subpotent-reason` | ValueSet/immunization-subpotent-reason | THO
67 | International Classification of Diseases | `http://hl7.org/fhir/sid/icd-10-cm` | Clinical Modification (ICD-10-CM) | CDC
68 | Link Type | `http://hl7.org/fhir/link-type` | ValueSet/link-type | FHIR
69 | Location Mode | `http://hl7.org/fhir/location-mode` | ValueSet/location-mode | FHIR
70 | Location Status | `http://hl7.org/fhir/location-status` | ValueSet/location-status | FHIR
71 | Location type | `http://terminology.hl7.org/CodeSystem/location-physical-type` | ValueSet/location-physical-type | THO
72 | Logical Observation Identifiers | `http://loinc.org` | LOINC provides a set of universal names and ID codes for identifying laboratory and clinical test results.1 2 LOINC facilitates the exchange and pooling of results such as blood hemoglobin serum potassium or vital signs for clinical care outcomes management and research. LOINC's universal identifiers (names and codes) can be used in the context of order and observation exchanges between information systems that use syntax standards such as HL73 CEN TC251 ISO TC215 ASTM4 and DICOM. Specifically the identifier can be used as the coded value for an observation in any other standard that uses the observation/observation value paradigm whether messages documents application programming interface (API) etc. For example LOINC codes are used widely in the OBX segment Observation Identifier field (OBX-3) of an ORU HL7 (HL7 version 2.x or ASTM 1238-9410) message that may be sent between a Clinical Laboratory Information Management Systems (LIMS) and Electronic Health Record Systems (EHR).5 6 In this way LOINC codes provide universal identifiers that allow the exchange of clinical data between heterogeneous computing environments. | LOINC
73 | MaritalStatus | `http://terminology.hl7.org/CodeSystem/v3-MaritalStatus` | ValueSet/marital-status | THO
74 | Medication Status Codes | `http://hl7.org/fhir/CodeSystem/medication-status` | ValueSet/medication-status | FHIR
75 | Medication dispense category codes | `http://terminology.hl7.org/fhir/CodeSystem/medicationdispense-category` | ValueSet/medicationdispense-category | THO
76 | Medication dispense status codes | `http://terminology.hl7.org/CodeSystem/medicationdispense-status` | ValueSet/medicationdispense-status | THO
77 | Medication dispense status reason codes | `http://terminology.hl7.org/fhir/CodeSystem/medicationdispense-status-reason` | ValueSet/medicationdispense-status-reason | THO
78 | MedicationDispense Performer Function Codes | `http://terminology.hl7.org/CodeSystem/medicationdispense-performer-function` | ValueSet/medicationdispense-performer-function | THO
79 | MedicationRequest Category Codes | `http://terminology.hl7.org/CodeSystem/medicationrequest-category` | ValueSet/medicationrequest-category | THO
80 | MedicationRequest Course of Therapy Codes | `http://terminology.hl7.org/CodeSystem/medicationrequest-course-of-therapy` | ValueSet/medicationrequest-course-of-therapy | THO
81 | MedicationRequest Intent Codes | `http://hl7.org/fhir/CodeSystem/medicationrequest-intent` | ValueSet/medicationrequest-intent | FHIR
82 | MedicationRequest Status Codes | `http://hl7.org/fhir/CodeSystem/medicationrequest-status` | ValueSet/medicationrequest-status | FHIR
83 | MedicationRequest Status Reason Codes | `http://terminology.hl7.org/CodeSystem/medicationrequest-status-reason` | ValueSet/medicationrequest-status-reason | THO
84 | NameUse | `http://hl7.org/fhir/name-use` | ValueSet/name-use | FHIR
85 | NarrativeStatus | `http://hl7.org/fhir/narrative-status` | ValueSet/us-core-narrative-status | FHIR
86 | NullFlavor | `http://terminology.hl7.org/CodeSystem/v3-NullFlavor` | ValueSet/us-core-documentreference-type ValueSet/marital-status ValueSet/encounter-special-courtesy | THO
87 | Observation Category Codes | `http://terminology.hl7.org/CodeSystem/observation-category` | ValueSet/us-core-screening-assessment-observation-category ValueSet/us-core-simple-observation-category ValueSet/us-core-clinical-result-observation-category ValueSet/observation-category ValueSet/us-core-screening-assessment-observation-maximum-category | THO
88 | Observation Reference Range Meaning Codes | `http://terminology.hl7.org/CodeSystem/referencerange-meaning` | ValueSet/referencerange-meaning | THO
89 | Observation Status | `http://hl7.org/fhir/observation-status` | ValueSet/us-core-observation-smoking-status-status ValueSet/observation-status | FHIR
90 | ObservationInterpretation | `http://terminology.hl7.org/CodeSystem/v3-ObservationInterpretation` | ValueSet/observation-interpretation | THO
91 | Occupational Data for Health (ODH) | `http://terminology.hl7.org/CodeSystem/PHOccupationalDataForHealthODH` | ValueSet/2.16.840.1.114222.4.11.7900 ValueSet/2.16.840.1.114222.4.11.7901 | THO
92 | Organization type | `http://terminology.hl7.org/CodeSystem/organization-type` | ValueSet/organization-type | THO
93 | Participant type | `http://terminology.hl7.org/CodeSystem/participant-type` | ValueSet/encounter-participant-type | THO
94 | ParticipationFunction | `http://terminology.hl7.org/CodeSystem/v3-ParticipationFunction` | ValueSet/security-role-type | THO
95 | ParticipationType | `http://terminology.hl7.org/CodeSystem/v3-ParticipationType` | ValueSet/security-role-type ValueSet/encounter-participant-type ValueSet/provenance-activity-type | THO
96 | Provenance Entity Role | `http://hl7.org/fhir/provenance-entity-role` | ValueSet/provenance-entity-role | FHIR
97 | Provenance participant type | `http://terminology.hl7.org/CodeSystem/provenance-participant-type` | ValueSet/provenance-agent-type | THO
98 | QuantityComparator | `http://hl7.org/fhir/quantity-comparator` | ValueSet/quantity-comparator | FHIR
99 | Questionnaire Response Status | `http://hl7.org/fhir/questionnaire-answers-status` | ValueSet/questionnaire-answers-status | FHIR
100 | RequestIntent | `http://hl7.org/fhir/request-intent` | ValueSet/request-intent ValueSet/care-plan-intent | FHIR
101 | RequestPriority | `http://hl7.org/fhir/request-priority` | ValueSet/request-priority | FHIR
102 | RequestStatus | `http://hl7.org/fhir/request-status` | ValueSet/request-status | FHIR
103 | ResourceType | `http://hl7.org/fhir/resource-types` | ValueSet/resource-types ValueSet/care-plan-activity-kind | FHIR
104 | RoleClass | `http://terminology.hl7.org/CodeSystem/v3-RoleClass` | ValueSet/security-role-type | THO
105 | RoleCode | `http://terminology.hl7.org/CodeSystem/v3-RoleCode` | ValueSet/security-role-type ValueSet/2.16.840.1.113883.11.20.12.1-20251204 ValueSet/v3-ServiceDeliveryLocationRoleType ValueSet/2.16.840.1.113883.1.11.19579-20250724 | THO
106 | RouteOfAdministration | `http://terminology.hl7.org/CodeSystem/v3-RouteOfAdministration` | ValueSet/immunization-route | THO
107 | SNOMED CT (all versions) | `http://snomed.info/sct` | ValueSet/servicerequest-category ValueSet/specimen-container-type ValueSet/procedure-followup ValueSet/us-core-goal-description ValueSet/specimen-collection-method ValueSet/medication-form-codes ValueSet/body-site ValueSet/manifestation-or-symptom ValueSet/procedure-code ValueSet/goal-start-event ValueSet/medication-as-needed-reason ValueSet/c80-facilitycodes ValueSet/immunization-reason ValueSet/substance-code ValueSet/2.16.840.1.113762.1.4.1099.54-20240606 ValueSet/us-core-procedure-code ValueSet/observation-methods ValueSet/care-plan-category ValueSet/questionnaire-answers ValueSet/servicerequest-orderdetail ValueSet/2.16.840.1.113762.1.4.1166.22-20230802 ValueSet/condition-stage ValueSet/clinical-findings ValueSet/immunization-target-disease ValueSet/encounter-reason ValueSet/additional-instruction-codes ValueSet/participant-role ValueSet/approach-site-codes ValueSet/device-action ValueSet/us-core-condition-code ValueSet/medication-codes ValueSet/device-kind ValueSet/performer-role ValueSet/referencerange-appliesto ValueSet/c80-practice-codes ValueSet/us-core-servicerequest-category ValueSet/2.16.840.1.113762.1.4.1267.3-20240217 ValueSet/route-codes ValueSet/care-plan-activity-outcome ValueSet/procedure-outcome ValueSet/2.16.840.1.113762.1.4.1021.121-20250228 ValueSet/procedure-category ValueSet/condition-code ValueSet/condition-stage-type ValueSet/procedure-not-performed-reason ValueSet/immunization-status-reason ValueSet/condition-outcome ValueSet/administration-method-codes ValueSet/condition-severity | SNOMED
108 | Security Role Type | `http://terminology.hl7.org/CodeSystem/extra-security-role-type` | ValueSet/security-role-type | THO
109 | Service type | `http://terminology.hl7.org/CodeSystem/service-type` | ValueSet/service-type | THO
110 | Source of Payment Typology | `https://nahdo.org/sopt` | ValueSet/2.16.840.1.114222.4.11.3591-20250419 | CDC
111 | Special arrangements | `http://terminology.hl7.org/CodeSystem/encounter-special-arrangements` | ValueSet/encounter-special-arrangements | THO
112 | Specimen Status | `http://hl7.org/fhir/specimen-status` | ValueSet/specimen-status | FHIR
113 | SubscriberPolicyholder Relationship Codes | `http://terminology.hl7.org/CodeSystem/subscriber-relationship` | ValueSet/subscriber-relationship | THO
114 | Substance Admin Substitution | `http://terminology.hl7.org/CodeSystem/v3-substanceAdminSubstitution` | ValueSet/v3-ActSubstanceAdminSubstitutionCode | THO
115 | Tags for the Identification of Languages | `urn:ietf:bcp:47` | ValueSet/languages ValueSet/Languages | Other
116 | TribalEntityUS | `http://terminology.hl7.org/CodeSystem/v3-TribalEntityUS` | ValueSet/v3-TribalEntityUS | THO
117 | UDI Entry Type | `http://hl7.org/fhir/udi-entry-type` | ValueSet/udi-entry-type | FHIR
118 | US Core Category | `http://hl7.org/fhir/us/core/CodeSystem/us-core-category` | ValueSet/us-core-screening-assessment-observation-category ValueSet/us-core-simple-observation-category ValueSet/us-core-servicerequest-category ValueSet/us-core-screening-assessment-condition-category ValueSet/us-core-screening-assessment-observation-maximum-category | US CORE
119 | US Core Condition Category Extension Codes | `http://hl7.org/fhir/us/core/CodeSystem/condition-category` | ValueSet/us-core-problem-or-health-concern | US CORE
120 | US Core DocumentReferences Category Codes | `http://hl7.org/fhir/us/core/CodeSystem/us-core-documentreference-category` | ValueSet/us-core-documentreference-category | US CORE
121 | USPS State Codes | `https://www.usps.com/` | ValueSet/USPS-State | Other
122 | Unified Code for Units of Measure (UCUM) | `http://unitsofmeasure.org` | ValueSet/ucum-bodyweight ValueSet/ucum-bodytemp ValueSet/ucum-common ValueSet/ucum-vitals-common ValueSet/ucum-bodylength ValueSet/v3-UnitsOfMeasureCaseSensitive | UCUM
123 | Vaccine Administered Code Set (CVX) | `http://hl7.org/fhir/sid/cvx` | ValueSet/2.16.840.1.113762.1.4.1010.6-20250411 | CDC
124 | additivePreservative | `http://terminology.hl7.org/CodeSystem/v2-0371` | ValueSet/v2-0371 | THO
125 | bedStatus | `http://terminology.hl7.org/CodeSystem/v2-0116` | ValueSet/v2-0116 | THO
126 | contactRole2 | `http://terminology.hl7.org/CodeSystem/v2-0131` | ValueSet/patient-contactrelationship | THO
127 | diagnosticServiceSectionId | `http://terminology.hl7.org/CodeSystem/v2-0074` | ValueSet/diagnostic-service-sections | THO
128 | identifierType | `http://terminology.hl7.org/CodeSystem/v2-0203` | ValueSet/identifier-type | THO
129 | providerRole | `http://terminology.hl7.org/CodeSystem/v2-0443` | ValueSet/immunization-function | THO
130 | re-admissionIndicator | `http://terminology.hl7.org/CodeSystem/v2-0092` | ValueSet/v2-0092 | THO
131 | relevantClincialInformation | `http://terminology.hl7.org/CodeSystem/v2-0916` | ValueSet/v2-0916 | THO
132 | treatment | `http://terminology.hl7.org/CodeSystem/v2-0373` | ValueSet/specimen-processing-procedure | THO

### The Value Set Authority Center (VSAC)

This guide links terminology directly to the FHIR® Terminology Service for VSAC Resources (Value Set Authority Center (VSAC)), where applicable, using a RESTful API service to access the VSAC value sets and supported code systems. See the table above for a list of value sets used in US Core that VSAC defines.

#### How to Access Value Sets in VSAC

- VSAC requires login using your own UMLS API Key to view the value sets. VSAC UMLS Licensing information. (See the screenshots below)
- The value sets in VSAC are specified using a VSAC value set OID.

- To view the value set expansion in the VSAC user interface, use:

  `GET https://vsac.nlm.nih.gov/ValueSet/[VSAC OID]/expansion`

  An example of this is shown in the screenshots below.

  When viewing a ValueSet in the VSAC UI, the Code System OIDs and VSAC Code System names are displayed for each code. However, these code system identifiers SHOULD NOT be used. The FHIR URIs code systems are defined as part of FHIR and SHOULD be used instead. Unfortunately, the FHIR URI for the code system is not shown. As a convenience for the reader, a VSAC to FHIR Code System Mapping Table is provided, which maps the VSAC Code System names to the corresponding FHIR URI. For more information, see this documentation describing the relationships between the VSAC value set name, FHIR value set name, and FHIR value set title and how to access VSAC's FHIR API.

- To fetch the FHIR ValueSet resource (in other words, the value set definition), use:

  `GET https://cts.nlm.nih.gov/fhir/ValueSet/[VSAC OID]`

- To fetch the FHIR ValueSet resource expansion, use the FHIR `$expand` operation:

  `GET https://cts.nlm.nih.gov/fhir/ValueSet/[VSAC OID]/$expand`

For more information, refer to the FHIR Terminology Service for VSAC Resources

##### Example

For example, the US Core Smoking Status Observation Profile `valueCodeableConcept` element has a preferred binding to the Smoking Status value set. To access it in VSAC, click on the link to `https://vsac.nlm.nih.gov/valueset/2.16.840.1.113883.11.20.9.38/expansion`:

Figure 1: VSAC link

The reader is redirected to the VSAC login page to enter an API Key (only one login is required per session):

Figure 2: VSAC API-Key Login

After successfully entering the API Key, the value set can be inspected, downloaded, etc., using the VSAC User interface, as shown in the figure below. This FHIR ValueSet resource can also be fetched using the URL `https://cts.nlm.nih.gov/fhir/ValueSet/2.16.840.1.113883.11.20.9.38`, and the FHIR ValueSet expansion using the URL `https://cts.nlm.nih.gov/fhir/ValueSet/2.16.840.1.113883.11.20.9.38/$expand`.

Figure 3: VSAC Smoking Status ValueSet