This page is part of the FHIR Specification (v3.2.0: R4 Ballot 1). The current version which supercedes this version is 5.0.0.  For a full list of available versions, see the Directory of published versions  . Page versions: R4B R4 R3 R2
. Page versions: R4B R4 R3 R2
| Patient Care Work Group | Maturity Level: 1 | Informative | Use Context: Any | 
Detailed Descriptions for the elements in the extension.
| Extension | |
| Definition | Further conditions, problems, diagnoses, procedures or events or the substance that caused/triggered this Condition. | 
| Control | 0..* This element is affected by the following invariants: ele-1 | 
| Comments | Although a condition may be caused by a substance, this is not intended to be used to record allergies/adverse reactions to substances. | 
| Invariants | Defined on this element ele-1: All FHIR elements must have a @value or children (xpath: @value|f:*|h:div) ext-1: Must have either extensions or value[x], not both (xpath: exists(f:extension)!=exists(f:*[starts-with(local-name(.), 'value')])) | 
| Extension.id | |
| Definition | unique id for the element within a resource (for internal references). This may be any string value that does not contain spaces. | 
| Control | 0..1 | 
| Type | string | 
| Extension.extension | |
| Definition | An Extension | 
| Control | 0..0 | 
| Type | Extension | 
| Slicing | This element introduces a set of slices. The slicing rules are: 
 | 
| Extension.url | |
| Definition | Source of the definition for the extension code - a logical name or a URL. | 
| Control | 1..1 | 
| Type | uri | 
| Comments | The definition may point directly to a computable or human-readable definition of the extensibility codes, or it may be a logical URI as declared in some other specification. The definition SHALL be a URI for the Structure Definition defining the extension. | 
| Fixed Value | http://hl7.org/fhir/StructureDefinition/condition-dueTo | 
| Extension.value[x] | |
| Definition | Value of extension - may be a resource or one of a constrained set of the data types (see Extensibility in the spec for list). | 
| Control | 1..1 | 
| Terminology Binding | Codes that describe causes of patient conditions; e.g. Surgical mishap, escalation of a previous condition, etc. For example codes, see Condition Cause Codes | 
| Type | Choice of: CodeableConcept, Reference(Condition), Reference(Procedure), Reference(MedicationAdministration), Reference(Immunization), Reference(MedicationStatement) | 
| [x] Note | See Choice of Data Types for further information about how to use [x] |