description: This extension represents an individual's sense of being a man, woman, boy, girl, nonbinary, or something else, ascertained by asking them what that identity is. Systems requiring multiple gender identities and associated dates **SHOULD** use the FHIR R5 [genderIdentity extension](http://hl7.org/fhir/extensions/StructureDefinition-individual-genderIdentity.html). When future versions of US Core are based on FHIR R5, the FHIR R5 extension will supersede this extension.
package_name: hl7.fhir.us.core
derivation: constraint
name: USCoreGenderIdentityExtension
type: Extension
elements:
  url:
    pattern: {type: Uri, value: 'http://hl7.org/fhir/us/core/StructureDefinition/us-core-genderIdentity'}
    index: 0
  value:
    choices: [valueCodeableConcept]
    index: 2
  valueCodeableConcept: {type: CodeableConcept, choiceOf: value, index: 3}
package_version: 8.0.0-ballot
class: extension
kind: complex-type
url: http://hl7.org/fhir/us/core/StructureDefinition/us-core-genderIdentity
base: http://hl7.org/fhir/StructureDefinition/Extension
version: 8.0.0-ballot