Name	Flags	Card.	Type	Description & Constraints    Filter: Bindings Constraints Obligations
AllergyIntolerance	C	0..*	IPAAllergyIntolerance	Allergy or Intolerance (generally: Risk of adverse reaction to a substance) Constraints: ait-1, ait-2
implicitRules	?!Σ	0..1	uri	A set of rules under which this content was created
modifierExtension	?!	0..*	Extension	Extensions that cannot be ignored
identifier	SΣ	1..*	CorrelationIdentifier	External ids for this item
clinicalStatus	?!SΣC	0..1	CodeableConcept	active | inactive | resolved Binding: AllergyIntoleranceClinicalStatusCodes (required): The clinical status of the allergy or intolerance.
verificationStatus	?!SΣC	0..1	CodeableConcept	unconfirmed | confirmed | refuted | entered-in-error Binding: AllergyIntoleranceVerificationStatusCodes (required): Assertion about certainty associated with a propensity, or potential risk, of a reaction to the identified substance.
code	SΣ	1..1	CodeableConcept	Code that identifies the allergy or intolerance Binding: AllergyIntoleranceSubstance/Product,ConditionAndNegationCodes (example): Type of the substance/product, allergy or intolerance condition, or negation/exclusion codes for reporting no known allergies.
Slices for coding	Σ	0..*	Coding	Code defined by a terminology system Slice: Unordered, Closed by value:system
coding:SNOMED	SΣ	0..*	Coding	Code defined by a terminology system Binding: UK Core Allergy Code (required)
system	Σ	1..1	uri	Identity of the terminology system Required Pattern: http://snomed.info/sct
patient	SΣ	1..1	Reference(IPA-Patient)	Who the sensitivity is for
identifier	Σ	0..1	NHSNumber	Logical reference, when literal reference is not known
Documentation for this format

Terminology Bindings

Path	Status	Usage	ValueSet	Version	Source
AllergyIntolerance.clinicalStatus	Base	required	AllergyIntolerance Clinical Status Codes	📍4.0.1	FHIR Std.
AllergyIntolerance.verificationStatus	Base	required	AllergyIntolerance Verification Status Codes	📍4.0.1	FHIR Std.
AllergyIntolerance.code	Base	example	AllergyIntolerance Substance/Product, Condition and Negation Codes	📦4.0.1	FHIR Std.
AllergyIntolerance.code.​coding:SNOMED	Base	required	UK Core Allergy Code	📦2.2.0	fhir.r4.ukcore.stu3.currentbuild v0.0

Constraints

Id	Grade	Path(s)	Description	Expression
ait-1	error	AllergyIntolerance	AllergyIntolerance.clinicalStatus SHALL be present if verificationStatus is not entered-in-error.	verificationStatus.coding.where(system = 'http://terminology.hl7.org/CodeSystem/allergyintolerance-verification' and code = 'entered-in-error').exists() or clinicalStatus.exists()
ait-2	error	AllergyIntolerance	AllergyIntolerance.clinicalStatus SHALL NOT be present if verification Status is entered-in-error	verificationStatus.coding.where(system = 'http://terminology.hl7.org/CodeSystem/allergyintolerance-verification' and code = 'entered-in-error').empty() or clinicalStatus.empty()
dom-2	error	AllergyIntolerance	If the resource is contained in another resource, it SHALL NOT contain nested Resources	contained.contained.empty()
dom-3	error	AllergyIntolerance	If the resource is contained in another resource, it SHALL be referred to from elsewhere in the resource or SHALL refer to the containing resource	contained.where((('#'+id in (%resource.descendants().reference | %resource.descendants().as(canonical) | %resource.descendants().as(uri) | %resource.descendants().as(url))) or descendants().where(reference = '#').exists() or descendants().where(as(canonical) = '#').exists() or descendants().where(as(canonical) = '#').exists()).not()).trace('unmatched', id).empty()
dom-4	error	AllergyIntolerance	If a resource is contained in another resource, it SHALL NOT have a meta.versionId or a meta.lastUpdated	contained.meta.versionId.empty() and contained.meta.lastUpdated.empty()
dom-5	error	AllergyIntolerance	If a resource is contained in another resource, it SHALL NOT have a security label	contained.meta.security.empty()
dom-6	best practice	AllergyIntolerance	A resource should have narrative for robust management	text.`div`.exists()
ele-1	error	**ALL** elements	All FHIR elements must have a @value or children	hasValue() or (children().count() > id.count())
ext-1	error	**ALL** extensions	Must have either extensions or value[x], not both	extension.exists() != value.exists()

Name	Flags	Card.	Type	Description & Constraints    Filter: Bindings Constraints Obligations
AllergyIntolerance		0..*	IPAAllergyIntolerance	Allergy or Intolerance (generally: Risk of adverse reaction to a substance)
identifier	S	1..*	CorrelationIdentifier	External ids for this item
code
Slices for coding		0..*	Coding	Code defined by a terminology system Slice: Unordered, Closed by value:system
coding:SNOMED	S	0..*	Coding	Code defined by a terminology system Binding: UK Core Allergy Code (required)
system		1..1	uri	Identity of the terminology system Required Pattern: http://snomed.info/sct
patient
identifier		0..1	NHSNumber	Logical reference, when literal reference is not known
Documentation for this format

Terminology Bindings (Differential)

Path	Status	Usage	ValueSet	Version	Source
AllergyIntolerance.code.​coding:SNOMED	Base	required	UK Core Allergy Code	📦2.2.0	fhir.r4.ukcore.stu3.currentbuild v0.0

Name	Flags	Card.	Type	Description & Constraints    Filter: Bindings Constraints Obligations
AllergyIntolerance	C	0..*	IPAAllergyIntolerance	Allergy or Intolerance (generally: Risk of adverse reaction to a substance) Constraints: ait-1, ait-2
id	Σ	0..1	id	Logical id of this artifact
meta	Σ	0..1	Meta	Metadata about the resource
implicitRules	?!Σ	0..1	uri	A set of rules under which this content was created
language		0..1	code	Language of the resource content Binding: CommonLanguages (preferred): A human language. Additional Bindings Purpose AllLanguages Max Binding
text		0..1	Narrative	Text summary of the resource, for human interpretation This profile does not constrain the narrative in regard to content, language, or traceability to data elements
contained		0..*	Resource	Contained, inline Resources
extension		0..*	Extension	Additional content defined by implementations
modifierExtension	?!	0..*	Extension	Extensions that cannot be ignored
identifier	SΣ	1..*	CorrelationIdentifier	External ids for this item
clinicalStatus	?!SΣC	0..1	CodeableConcept	active | inactive | resolved Binding: AllergyIntoleranceClinicalStatusCodes (required): The clinical status of the allergy or intolerance.
verificationStatus	?!SΣC	0..1	CodeableConcept	unconfirmed | confirmed | refuted | entered-in-error Binding: AllergyIntoleranceVerificationStatusCodes (required): Assertion about certainty associated with a propensity, or potential risk, of a reaction to the identified substance.
type	Σ	0..1	code	allergy | intolerance - Underlying mechanism (if known) Binding: AllergyIntoleranceType (required): Identification of the underlying physiological mechanism for a Reaction Risk.
category	Σ	0..*	code	food | medication | environment | biologic Binding: AllergyIntoleranceCategory (required): Category of an identified substance associated with allergies or intolerances.
criticality	Σ	0..1	code	low | high | unable-to-assess Binding: AllergyIntoleranceCriticality (required): Estimate of the potential clinical harm, or seriousness, of a reaction to an identified substance.
code	SΣ	1..1	CodeableConcept	Code that identifies the allergy or intolerance Binding: AllergyIntoleranceSubstance/Product,ConditionAndNegationCodes (example): Type of the substance/product, allergy or intolerance condition, or negation/exclusion codes for reporting no known allergies.
id		0..1	string	Unique id for inter-element referencing
extension		0..*	Extension	Additional content defined by implementations Slice: Unordered, Open by value:url
Slices for coding	Σ	0..*	Coding	Code defined by a terminology system Slice: Unordered, Closed by value:system
coding:SNOMED	SΣ	0..*	Coding	Code defined by a terminology system Binding: UK Core Allergy Code (required)
id		0..1	string	Unique id for inter-element referencing
extension		0..*	Extension	Additional content defined by implementations Slice: Unordered, Open by value:url
system	Σ	1..1	uri	Identity of the terminology system Required Pattern: http://snomed.info/sct
version	Σ	0..1	string	Version of the system - if relevant
code	Σ	0..1	code	Symbol in syntax defined by the system
display	Σ	0..1	string	Representation defined by the system
userSelected	Σ	0..1	boolean	If this coding was chosen directly by the user
text	Σ	0..1	string	Plain text representation of the concept
patient	SΣ	1..1	Reference(IPA-Patient)	Who the sensitivity is for
id		0..1	string	Unique id for inter-element referencing
extension		0..*	Extension	Additional content defined by implementations Slice: Unordered, Open by value:url
reference	ΣC	0..1	string	Literal reference, Relative, internal or absolute URL
type	Σ	0..1	uri	Type the reference refers to (e.g. "Patient") Binding: ResourceType (extensible): Aa resource (or, for logical models, the URI of the logical model).
identifier	Σ	0..1	NHSNumber	Logical reference, when literal reference is not known
display	Σ	0..1	string	Text alternative for the resource
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
id		0..1	string	Unique id for inter-element referencing
extension		0..*	Extension	Additional content defined by implementations
modifierExtension	?!Σ	0..*	Extension	Extensions that cannot be ignored even if unrecognized
substance		0..1	CodeableConcept	Specific substance or pharmaceutical product considered to be responsible for event Binding: SubstanceCode (example): Codes defining the type of the substance (including pharmaceutical products).
manifestation		1..*	CodeableConcept	Clinical symptoms/signs associated with the Event Binding: SNOMEDCTClinicalFindings (example): Clinical symptoms and/or signs that are observed or associated with an Adverse Reaction Event.
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: AllergyIntoleranceSeverity (required): Clinical assessment of the severity of a reaction event as a whole, potentially considering multiple different manifestations.
exposureRoute		0..1	CodeableConcept	How the subject was exposed to the substance Binding: SNOMEDCTRouteCodes (example): A coded concept describing the route or physiological path of administration of a therapeutic agent into or onto the body of a subject.
note		0..*	Annotation	Text about event not captured in other fields
Documentation for this format

Terminology Bindings

Path	Status	Usage	ValueSet	Version	Source
AllergyIntolerance.language	Base	preferred	Common Languages	📦4.0.1	FHIR Std.
AllergyIntolerance.clinicalStatus	Base	required	AllergyIntolerance Clinical Status Codes	📍4.0.1	FHIR Std.
AllergyIntolerance.verificationStatus	Base	required	AllergyIntolerance Verification Status Codes	📍4.0.1	FHIR Std.
AllergyIntolerance.type	Base	required	AllergyIntoleranceType	📍4.0.1	FHIR Std.
AllergyIntolerance.category	Base	required	AllergyIntoleranceCategory	📍4.0.1	FHIR Std.
AllergyIntolerance.criticality	Base	required	AllergyIntoleranceCriticality	📍4.0.1	FHIR Std.
AllergyIntolerance.code	Base	example	AllergyIntolerance Substance/Product, Condition and Negation Codes	📦4.0.1	FHIR Std.
AllergyIntolerance.code.​coding:SNOMED	Base	required	UK Core Allergy Code	📦2.2.0	fhir.r4.ukcore.stu3.currentbuild v0.0
AllergyIntolerance.patient.​type	Base	extensible	ResourceType	📍4.0.1	FHIR Std.
AllergyIntolerance.reaction.​substance	Base	example	Substance Code	📦4.0.1	FHIR Std.
AllergyIntolerance.reaction.​manifestation	Base	example	SNOMED CT Clinical Findings	📦4.0.1	FHIR Std.
AllergyIntolerance.reaction.​severity	Base	required	AllergyIntoleranceSeverity	📍4.0.1	FHIR Std.
AllergyIntolerance.reaction.​exposureRoute	Base	example	SNOMED CT Route Codes	📦4.0.1	FHIR Std.

Constraints

Id	Grade	Path(s)	Description	Expression
ait-1	error	AllergyIntolerance	AllergyIntolerance.clinicalStatus SHALL be present if verificationStatus is not entered-in-error.	verificationStatus.coding.where(system = 'http://terminology.hl7.org/CodeSystem/allergyintolerance-verification' and code = 'entered-in-error').exists() or clinicalStatus.exists()
ait-2	error	AllergyIntolerance	AllergyIntolerance.clinicalStatus SHALL NOT be present if verification Status is entered-in-error	verificationStatus.coding.where(system = 'http://terminology.hl7.org/CodeSystem/allergyintolerance-verification' and code = 'entered-in-error').empty() or clinicalStatus.empty()
dom-2	error	AllergyIntolerance	If the resource is contained in another resource, it SHALL NOT contain nested Resources	contained.contained.empty()
dom-3	error	AllergyIntolerance	If the resource is contained in another resource, it SHALL be referred to from elsewhere in the resource or SHALL refer to the containing resource	contained.where((('#'+id in (%resource.descendants().reference | %resource.descendants().as(canonical) | %resource.descendants().as(uri) | %resource.descendants().as(url))) or descendants().where(reference = '#').exists() or descendants().where(as(canonical) = '#').exists() or descendants().where(as(canonical) = '#').exists()).not()).trace('unmatched', id).empty()
dom-4	error	AllergyIntolerance	If a resource is contained in another resource, it SHALL NOT have a meta.versionId or a meta.lastUpdated	contained.meta.versionId.empty() and contained.meta.lastUpdated.empty()
dom-5	error	AllergyIntolerance	If a resource is contained in another resource, it SHALL NOT have a security label	contained.meta.security.empty()
dom-6	best practice	AllergyIntolerance	A resource should have narrative for robust management	text.`div`.exists()
ele-1	error	**ALL** elements	All FHIR elements must have a @value or children	hasValue() or (children().count() > id.count())
ext-1	error	**ALL** extensions	Must have either extensions or value[x], not both	extension.exists() != value.exists()

Summary

Mandatory: 1 element(1 nested mandatory element)
Must-Support: 2 elements

Structures

This structure refers to these other structures:

• Correlation Identifier (https://fhir.virtually.healthcare/StructureDefinition/CorrelationIdentifier)
• NHS Number (https://fhir.virtually.healthcare/StructureDefinition/NHSNumber)

Slices

This structure defines the following Slices:

• The element 1 is sliced based on the value of AllergyIntolerance.code.coding (Closed)

Name	Flags	Card.	Type	Description & Constraints    Filter: Bindings Constraints Obligations
AllergyIntolerance	C	0..*	IPAAllergyIntolerance	Allergy or Intolerance (generally: Risk of adverse reaction to a substance) Constraints: ait-1, ait-2
implicitRules	?!Σ	0..1	uri	A set of rules under which this content was created
modifierExtension	?!	0..*	Extension	Extensions that cannot be ignored
identifier	SΣ	1..*	CorrelationIdentifier	External ids for this item
clinicalStatus	?!SΣC	0..1	CodeableConcept	active | inactive | resolved Binding: AllergyIntoleranceClinicalStatusCodes (required): The clinical status of the allergy or intolerance.
verificationStatus	?!SΣC	0..1	CodeableConcept	unconfirmed | confirmed | refuted | entered-in-error Binding: AllergyIntoleranceVerificationStatusCodes (required): Assertion about certainty associated with a propensity, or potential risk, of a reaction to the identified substance.
code	SΣ	1..1	CodeableConcept	Code that identifies the allergy or intolerance Binding: AllergyIntoleranceSubstance/Product,ConditionAndNegationCodes (example): Type of the substance/product, allergy or intolerance condition, or negation/exclusion codes for reporting no known allergies.
Slices for coding	Σ	0..*	Coding	Code defined by a terminology system Slice: Unordered, Closed by value:system
coding:SNOMED	SΣ	0..*	Coding	Code defined by a terminology system Binding: UK Core Allergy Code (required)
system	Σ	1..1	uri	Identity of the terminology system Required Pattern: http://snomed.info/sct
patient	SΣ	1..1	Reference(IPA-Patient)	Who the sensitivity is for
identifier	Σ	0..1	NHSNumber	Logical reference, when literal reference is not known
Documentation for this format

Terminology Bindings

Path	Status	Usage	ValueSet	Version	Source
AllergyIntolerance.clinicalStatus	Base	required	AllergyIntolerance Clinical Status Codes	📍4.0.1	FHIR Std.
AllergyIntolerance.verificationStatus	Base	required	AllergyIntolerance Verification Status Codes	📍4.0.1	FHIR Std.
AllergyIntolerance.code	Base	example	AllergyIntolerance Substance/Product, Condition and Negation Codes	📦4.0.1	FHIR Std.
AllergyIntolerance.code.​coding:SNOMED	Base	required	UK Core Allergy Code	📦2.2.0	fhir.r4.ukcore.stu3.currentbuild v0.0

Constraints

Id	Grade	Path(s)	Description	Expression
ait-1	error	AllergyIntolerance	AllergyIntolerance.clinicalStatus SHALL be present if verificationStatus is not entered-in-error.	verificationStatus.coding.where(system = 'http://terminology.hl7.org/CodeSystem/allergyintolerance-verification' and code = 'entered-in-error').exists() or clinicalStatus.exists()
ait-2	error	AllergyIntolerance	AllergyIntolerance.clinicalStatus SHALL NOT be present if verification Status is entered-in-error	verificationStatus.coding.where(system = 'http://terminology.hl7.org/CodeSystem/allergyintolerance-verification' and code = 'entered-in-error').empty() or clinicalStatus.empty()
dom-2	error	AllergyIntolerance	If the resource is contained in another resource, it SHALL NOT contain nested Resources	contained.contained.empty()
dom-3	error	AllergyIntolerance	If the resource is contained in another resource, it SHALL be referred to from elsewhere in the resource or SHALL refer to the containing resource	contained.where((('#'+id in (%resource.descendants().reference | %resource.descendants().as(canonical) | %resource.descendants().as(uri) | %resource.descendants().as(url))) or descendants().where(reference = '#').exists() or descendants().where(as(canonical) = '#').exists() or descendants().where(as(canonical) = '#').exists()).not()).trace('unmatched', id).empty()
dom-4	error	AllergyIntolerance	If a resource is contained in another resource, it SHALL NOT have a meta.versionId or a meta.lastUpdated	contained.meta.versionId.empty() and contained.meta.lastUpdated.empty()
dom-5	error	AllergyIntolerance	If a resource is contained in another resource, it SHALL NOT have a security label	contained.meta.security.empty()
dom-6	best practice	AllergyIntolerance	A resource should have narrative for robust management	text.`div`.exists()
ele-1	error	**ALL** elements	All FHIR elements must have a @value or children	hasValue() or (children().count() > id.count())
ext-1	error	**ALL** extensions	Must have either extensions or value[x], not both	extension.exists() != value.exists()

Name	Flags	Card.	Type	Description & Constraints    Filter: Bindings Constraints Obligations
AllergyIntolerance		0..*	IPAAllergyIntolerance	Allergy or Intolerance (generally: Risk of adverse reaction to a substance)
identifier	S	1..*	CorrelationIdentifier	External ids for this item
code
Slices for coding		0..*	Coding	Code defined by a terminology system Slice: Unordered, Closed by value:system
coding:SNOMED	S	0..*	Coding	Code defined by a terminology system Binding: UK Core Allergy Code (required)
system		1..1	uri	Identity of the terminology system Required Pattern: http://snomed.info/sct
patient
identifier		0..1	NHSNumber	Logical reference, when literal reference is not known
Documentation for this format

Terminology Bindings (Differential)

Path	Status	Usage	ValueSet	Version	Source
AllergyIntolerance.code.​coding:SNOMED	Base	required	UK Core Allergy Code	📦2.2.0	fhir.r4.ukcore.stu3.currentbuild v0.0

Name	Flags	Card.	Type	Description & Constraints    Filter: Bindings Constraints Obligations
AllergyIntolerance	C	0..*	IPAAllergyIntolerance	Allergy or Intolerance (generally: Risk of adverse reaction to a substance) Constraints: ait-1, ait-2
id	Σ	0..1	id	Logical id of this artifact
meta	Σ	0..1	Meta	Metadata about the resource
implicitRules	?!Σ	0..1	uri	A set of rules under which this content was created
language		0..1	code	Language of the resource content Binding: CommonLanguages (preferred): A human language. Additional Bindings Purpose AllLanguages Max Binding
text		0..1	Narrative	Text summary of the resource, for human interpretation This profile does not constrain the narrative in regard to content, language, or traceability to data elements
contained		0..*	Resource	Contained, inline Resources
extension		0..*	Extension	Additional content defined by implementations
modifierExtension	?!	0..*	Extension	Extensions that cannot be ignored
identifier	SΣ	1..*	CorrelationIdentifier	External ids for this item
clinicalStatus	?!SΣC	0..1	CodeableConcept	active | inactive | resolved Binding: AllergyIntoleranceClinicalStatusCodes (required): The clinical status of the allergy or intolerance.
verificationStatus	?!SΣC	0..1	CodeableConcept	unconfirmed | confirmed | refuted | entered-in-error Binding: AllergyIntoleranceVerificationStatusCodes (required): Assertion about certainty associated with a propensity, or potential risk, of a reaction to the identified substance.
type	Σ	0..1	code	allergy | intolerance - Underlying mechanism (if known) Binding: AllergyIntoleranceType (required): Identification of the underlying physiological mechanism for a Reaction Risk.
category	Σ	0..*	code	food | medication | environment | biologic Binding: AllergyIntoleranceCategory (required): Category of an identified substance associated with allergies or intolerances.
criticality	Σ	0..1	code	low | high | unable-to-assess Binding: AllergyIntoleranceCriticality (required): Estimate of the potential clinical harm, or seriousness, of a reaction to an identified substance.
code	SΣ	1..1	CodeableConcept	Code that identifies the allergy or intolerance Binding: AllergyIntoleranceSubstance/Product,ConditionAndNegationCodes (example): Type of the substance/product, allergy or intolerance condition, or negation/exclusion codes for reporting no known allergies.
id		0..1	string	Unique id for inter-element referencing
extension		0..*	Extension	Additional content defined by implementations Slice: Unordered, Open by value:url
Slices for coding	Σ	0..*	Coding	Code defined by a terminology system Slice: Unordered, Closed by value:system
coding:SNOMED	SΣ	0..*	Coding	Code defined by a terminology system Binding: UK Core Allergy Code (required)
id		0..1	string	Unique id for inter-element referencing
extension		0..*	Extension	Additional content defined by implementations Slice: Unordered, Open by value:url
system	Σ	1..1	uri	Identity of the terminology system Required Pattern: http://snomed.info/sct
version	Σ	0..1	string	Version of the system - if relevant
code	Σ	0..1	code	Symbol in syntax defined by the system
display	Σ	0..1	string	Representation defined by the system
userSelected	Σ	0..1	boolean	If this coding was chosen directly by the user
text	Σ	0..1	string	Plain text representation of the concept
patient	SΣ	1..1	Reference(IPA-Patient)	Who the sensitivity is for
id		0..1	string	Unique id for inter-element referencing
extension		0..*	Extension	Additional content defined by implementations Slice: Unordered, Open by value:url
reference	ΣC	0..1	string	Literal reference, Relative, internal or absolute URL
type	Σ	0..1	uri	Type the reference refers to (e.g. "Patient") Binding: ResourceType (extensible): Aa resource (or, for logical models, the URI of the logical model).
identifier	Σ	0..1	NHSNumber	Logical reference, when literal reference is not known
display	Σ	0..1	string	Text alternative for the resource
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
id		0..1	string	Unique id for inter-element referencing
extension		0..*	Extension	Additional content defined by implementations
modifierExtension	?!Σ	0..*	Extension	Extensions that cannot be ignored even if unrecognized
substance		0..1	CodeableConcept	Specific substance or pharmaceutical product considered to be responsible for event Binding: SubstanceCode (example): Codes defining the type of the substance (including pharmaceutical products).
manifestation		1..*	CodeableConcept	Clinical symptoms/signs associated with the Event Binding: SNOMEDCTClinicalFindings (example): Clinical symptoms and/or signs that are observed or associated with an Adverse Reaction Event.
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: AllergyIntoleranceSeverity (required): Clinical assessment of the severity of a reaction event as a whole, potentially considering multiple different manifestations.
exposureRoute		0..1	CodeableConcept	How the subject was exposed to the substance Binding: SNOMEDCTRouteCodes (example): A coded concept describing the route or physiological path of administration of a therapeutic agent into or onto the body of a subject.
note		0..*	Annotation	Text about event not captured in other fields
Documentation for this format

Terminology Bindings

Path	Status	Usage	ValueSet	Version	Source
AllergyIntolerance.language	Base	preferred	Common Languages	📦4.0.1	FHIR Std.
AllergyIntolerance.clinicalStatus	Base	required	AllergyIntolerance Clinical Status Codes	📍4.0.1	FHIR Std.
AllergyIntolerance.verificationStatus	Base	required	AllergyIntolerance Verification Status Codes	📍4.0.1	FHIR Std.
AllergyIntolerance.type	Base	required	AllergyIntoleranceType	📍4.0.1	FHIR Std.
AllergyIntolerance.category	Base	required	AllergyIntoleranceCategory	📍4.0.1	FHIR Std.
AllergyIntolerance.criticality	Base	required	AllergyIntoleranceCriticality	📍4.0.1	FHIR Std.
AllergyIntolerance.code	Base	example	AllergyIntolerance Substance/Product, Condition and Negation Codes	📦4.0.1	FHIR Std.
AllergyIntolerance.code.​coding:SNOMED	Base	required	UK Core Allergy Code	📦2.2.0	fhir.r4.ukcore.stu3.currentbuild v0.0
AllergyIntolerance.patient.​type	Base	extensible	ResourceType	📍4.0.1	FHIR Std.
AllergyIntolerance.reaction.​substance	Base	example	Substance Code	📦4.0.1	FHIR Std.
AllergyIntolerance.reaction.​manifestation	Base	example	SNOMED CT Clinical Findings	📦4.0.1	FHIR Std.
AllergyIntolerance.reaction.​severity	Base	required	AllergyIntoleranceSeverity	📍4.0.1	FHIR Std.
AllergyIntolerance.reaction.​exposureRoute	Base	example	SNOMED CT Route Codes	📦4.0.1	FHIR Std.

Constraints

Id	Grade	Path(s)	Description	Expression
ait-1	error	AllergyIntolerance	AllergyIntolerance.clinicalStatus SHALL be present if verificationStatus is not entered-in-error.	verificationStatus.coding.where(system = 'http://terminology.hl7.org/CodeSystem/allergyintolerance-verification' and code = 'entered-in-error').exists() or clinicalStatus.exists()
ait-2	error	AllergyIntolerance	AllergyIntolerance.clinicalStatus SHALL NOT be present if verification Status is entered-in-error	verificationStatus.coding.where(system = 'http://terminology.hl7.org/CodeSystem/allergyintolerance-verification' and code = 'entered-in-error').empty() or clinicalStatus.empty()
dom-2	error	AllergyIntolerance	If the resource is contained in another resource, it SHALL NOT contain nested Resources	contained.contained.empty()
dom-3	error	AllergyIntolerance	If the resource is contained in another resource, it SHALL be referred to from elsewhere in the resource or SHALL refer to the containing resource	contained.where((('#'+id in (%resource.descendants().reference | %resource.descendants().as(canonical) | %resource.descendants().as(uri) | %resource.descendants().as(url))) or descendants().where(reference = '#').exists() or descendants().where(as(canonical) = '#').exists() or descendants().where(as(canonical) = '#').exists()).not()).trace('unmatched', id).empty()
dom-4	error	AllergyIntolerance	If a resource is contained in another resource, it SHALL NOT have a meta.versionId or a meta.lastUpdated	contained.meta.versionId.empty() and contained.meta.lastUpdated.empty()
dom-5	error	AllergyIntolerance	If a resource is contained in another resource, it SHALL NOT have a security label	contained.meta.security.empty()
dom-6	best practice	AllergyIntolerance	A resource should have narrative for robust management	text.`div`.exists()
ele-1	error	**ALL** elements	All FHIR elements must have a @value or children	hasValue() or (children().count() > id.count())
ext-1	error	**ALL** extensions	Must have either extensions or value[x], not both	extension.exists() != value.exists()

Summary

Mandatory: 1 element(1 nested mandatory element)
Must-Support: 2 elements

Structures

This structure refers to these other structures:

• Correlation Identifier (https://fhir.virtually.healthcare/StructureDefinition/CorrelationIdentifier)
• NHS Number (https://fhir.virtually.healthcare/StructureDefinition/NHSNumber)

Slices

This structure defines the following Slices:

• The element 1 is sliced based on the value of AllergyIntolerance.code.coding (Closed)