description: This extension is used to convey the reason for not providing the patient's health card number as a business identifier. package_name: Touchstone derivation: constraint name: ReasonForNoHCN type: Extension elements: url: pattern: {type: Uri, value: 'http://ehealthontario.ca/fhir/StructureDefinition/ext-reason-for-no-HCN'} index: 0 value: choices: [valueCodeableConcept] index: 2 valueCodeableConcept: {type: CodeableConcept, choiceOf: value, index: 3} package_version: ereferralontario.core-0.1.0-beta class: extension kind: complex-type url: http://ehealthontario.ca/fhir/StructureDefinition/ext-reason-for-no-HCN base: http://hl7.org/fhir/StructureDefinition/Extension version: 0.10.1