http://hl7.org/fhir/StructureDefinition/allergyintolerance-certainty|5.2.0

Statement about the degree of clinical certainty that the specific substance was the cause of the manifestation in this reaction event.
typedestination
baseDefinitionhttp://hl7.org/fhir/StructureDefinition/Extension
typehttp://hl7.org/fhir/StructureDefinition/Extension
Extension.value[x].typehttp://hl7.org/fhir/StructureDefinition/CodeableConcept
Extension.value[x].binding.valueSethttp://hl7.org/fhir/ValueSet/reaction-event-certainty