Name	Flags	Card.	Type	Description & Constraints
AllergyIntolerance			DomainResource	Allergy or Intolerance (generally: Risk Of Adverse reaction to a substance)
identifier	Σ	0..*	Identifier	External ids for this item
onset	Σ	0..1	dateTime	Date(/time) when manifestations showed
recordedDate	Σ	0..1	dateTime	When recorded
recorder	Σ	0..1	Reference( Practitioner | Patient)	Who recorded the sensitivity
patient	Σ	1..1	Reference( Patient)	Who the sensitivity is for
reporter	Σ	0..1	Reference( Patient | RelatedPerson | Practitioner)	Source of the information about the allergy
substance	Σ	1..1	CodeableConcept	Substance, (or class) considered to be responsible for risk AllergyIntolerance Substance and Negation Codes ( Example)
status	?! Σ	0..1	code	active | unconfirmed | confirmed | inactive | resolved | refuted | entered-in-error AllergyIntoleranceStatus ( Required)
criticality	Σ	0..1	code	CRITL | CRITH | CRITU AllergyIntoleranceCriticality ( Required)
type	Σ	0..1	code	allergy | intolerance - Underlying mechanism (if known) AllergyIntoleranceType ( Required)
category	Σ	0..1	code	food | medication | environment | other - Category of Substance AllergyIntoleranceCategory ( Required)
lastOccurence	Σ	0..1	dateTime	Date(/time) of last known occurrence of a reaction
note		0..1	Annotation	Additional text not captured in other fields
reaction		0..*	BackboneElement	Adverse Reaction Events linked to exposure to substance
substance	Σ	0..1	CodeableConcept	Specific substance considered to be responsible for event Substance Code ( Example)
certainty	Σ	0..1	code	unlikely | likely | confirmed - clinical certainty about the specific substance AllergyIntoleranceCertainty ( Required)
manifestation	Σ	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	Σ	0..1	dateTime	Date(/time) when manifestations showed
severity	Σ	0..1	code	mild | moderate | severe (of event as a whole) AllergyIntoleranceSeverity ( Required)
exposureRoute	Σ	0..1	CodeableConcept	How the subject was exposed to the substance SNOMED CT Route Codes ( Example)
note		0..1	Annotation	Text about event not captured in other fields
Documentation for this format