Name	Flags	Card.	Type	Description & Constraints
AllergyIntolerance	I TU		DomainResource	Allergy or Intolerance (generally: Risk of adverse reaction to a substance) + Rule: AllergyIntolerance.clinicalStatus SHALL be present if verificationStatus is not entered-in-error. + Rule: AllergyIntolerance.clinicalStatus SHALL NOT be present if verification Status is entered-in-error Elements defined in Ancestors: id, meta, implicitRules, language, text, contained, extension, modifierExtension
identifier	Σ	0..*	Identifier	External ids for this item
clinicalStatus	?! Σ I	0..1	CodeableConcept	active | inactive | resolved AllergyIntolerance Clinical Status Codes ( Required)
verificationStatus	?! Σ I	0..1	CodeableConcept	unconfirmed | confirmed | refuted | entered-in-error AllergyIntolerance Verification Status Codes ( Required)
type	Σ	0..1	code	allergy | intolerance - Underlying mechanism (if known) AllergyIntoleranceType ( Required)
category	Σ	0..*	code	food | medication | environment | biologic AllergyIntoleranceCategory ( Required)
criticality	Σ	0..1	code	low | high | unable-to-assess AllergyIntoleranceCriticality ( Required)
code	Σ	0..1	CodeableConcept	Code that identifies the allergy or intolerance AllergyIntolerance Substance/Product, Condition and Negation Codes ( Example)
patient	Σ	1..1	Reference( Patient)	Who the sensitivity is for
encounter		0..1	Reference( Encounter)	Encounter when the allergy or intolerance was asserted
onset[x]		0..1		When allergy or intolerance was identified
onsetDateTime			dateTime
onsetAge			Age
onsetPeriod			Period
onsetRange			Range
onsetString			string
recordedDate		0..1	dateTime	Date first version of the resource instance was recorded
recorder		0..1	Reference( Practitioner | PractitionerRole | Patient | RelatedPerson)	Who recorded the sensitivity
asserter	Σ	0..1	Reference( Patient | RelatedPerson | Practitioner | PractitionerRole)	Source of the information about the allergy
lastOccurrence		0..1	dateTime	Date(/time) of last known occurrence of a reaction
note		0..*	Annotation	Additional text not captured in other fields
reaction		0..*	BackboneElement	Adverse Reaction Events linked to exposure to substance
substance		0..1	CodeableConcept	Specific substance or pharmaceutical product considered to be responsible for event Substance Code ( Example)
manifestation		1..*	CodeableConcept	Clinical symptoms/signs associated with the Event SNOMED CT Clinical Findings ( Example)
description		0..1	string	Description of the event as a whole
onset		0..1	dateTime	Date(/time) when manifestations showed
severity		0..1	code	mild | moderate | severe (of event as a whole) AllergyIntoleranceSeverity ( Required)
exposureRoute		0..1	CodeableConcept	How the subject was exposed to the substance SNOMED CT Route Codes ( Example)
note		0..*	Annotation	Text about event not captured in other fields
Documentation for this format