Name	Flags	Card.	Type	Description & Constraints
AllergyIntolerance	TU		DomainResource	Allergy or Intolerance (generally: Risk of adverse reaction to a substance) Elements defined in Ancestors: id, meta, implicitRules, language, text, contained, extension, modifierExtension
identifier	Σ	0..*	Identifier	External ids for this item
clinicalStatus	?! Σ	0..1	CodeableConcept	active | inactive | resolved Binding: AllergyIntolerance Clinical Status Codes ( Required)
verificationStatus	?! Σ	0..1	CodeableConcept	unconfirmed | presumed | confirmed | refuted | entered-in-error Binding: AllergyIntolerance Verification Status ( Required)
type	Σ TU	0..1	CodeableConcept	allergy | intolerance - Underlying mechanism (if known) Binding: Allergy Intolerance Type ( Preferred)
category	Σ	0..*	code	food | medication | environment | biologic Binding: Allergy Intolerance Category ( Required)
criticality	Σ	0..1	code	low | high | unable-to-assess Binding: Allergy Intolerance Criticality ( Required)
code	Σ	0..1	CodeableConcept	Code that identifies the allergy or intolerance Binding: AllergyIntolerance Substance/Product, Condition and Negation Codes ( Example)
patient	Σ	1..1	Reference( Patient)	Who the allergy or intolerance 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 allergy or intolerance was first recorded
participant	Σ	0..*	BackboneElement	Who or what participated in the activities related to the allergy or intolerance and how they were involved
function	Σ	0..1	CodeableConcept	Type of involvement Binding: Participation Role Type ( Extensible)
actor	Σ	1..1	Reference( Practitioner | PractitionerRole | Patient | RelatedPerson | Device | Organization | CareTeam)	Who or what participated in the activities related to the allergy or intolerance
lastOccurrence		0..1	dateTime	Date(/time) of last known occurrence of a reaction
note		0..*	Annotation	Additional text not captured in other fields
reaction	TU	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 Binding: Substance Code ( Example)
manifestation		1..*	CodeableReference( Observation)	Clinical symptoms/signs associated with the Event Binding: 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) Binding: Allergy Intolerance Severity ( Required)
exposureRoute		0..1	CodeableConcept	How the subject was exposed to the substance Binding: SNOMED CT Route Codes ( Example)
note		0..*	Annotation	Text about event not captured in other fields
Documentation for this format