http://hl7.org/fhir/StructureDefinition/familymemberhistory-type|5.2.0

Purpose of the family member history or why it was created, such as when family member history is targeted for cardiovascular health, mental health, or genetic counseling.
typedestination
baseDefinitionhttp://hl7.org/fhir/StructureDefinition/Extension
typehttp://hl7.org/fhir/StructureDefinition/Extension
Extension.value[x].typehttp://hl7.org/fhir/StructureDefinition/CodeableConcept