Segment AL1 in FHIR

How segment AL1 (Patient Allergy Information) becomes FHIR R4 resources, from the HL7 Version 2 to FHIR guide.

HL7 v2 definition
Definition of AL1 in HL7 v2 2.8
Maps
AllergyIntolerance
Used in messages
ADT_A01ADT_A05ADT_A06OML_O21ORM_O01

To AllergyIntolerance13 rows

HL7 v2 sourcev2 typeFHIR elementFHIR typeConditions and notes
AL1whole segment
clinicalStatus.coding.codecode
Value "active"
AL1whole segment
clinicalStatus.coding.systemuri
Value "http://terminology.hl7.org/CodeSystem/allergyintolerance-clinical"
AL1-2Allergen Type Code
CWEcategorycode
AL1-2Allergen Type Code
CWEcategory.extension[1].urluri
Value "http://hl7.org/fhir/StructureDefinition/alternate-codes"
AL1-2Allergen Type Code
CWEcategory.extension[1].valueCodeableConceptCodeableConcept
Code map v2-0127
AL1-2Allergen Type Code
CWEtypecode
AL1-3Allergen Code/Mnemonic/Description
CWEcodeCodeableConcept
AL1-4Allergy Severity Code
CWEcriticalitycode
If severity was used equivalent to criticalityCode map allergy-intolerance-criticality
AL1-4Allergy Severity Code
CWEcriticality.extension[1].urluri
If severity was used equivalent to criticalityValue "http://hl7.org/fhir/StructureDefinition/alternate-codes"
AL1-4Allergy Severity Code
CWEcriticality.extension[1].valueCodeableConceptCodeableConcept
If severity was used equivalent to criticalityCode map table-hl70128-original-to-v2-0128
AL1-4Allergy Severity Code
CWEreaction.severitycode
If severity was not used equivalent to criticalityCode map reaction-event-severity
AL1-5Allergy Reaction Code
STreaction.manifestation.textCodeableConcept
AL1-6Identification Date
DTonsetDateTimedateTime