description: A code that qualifies the copay amount package_name: hl7.fhir.us.davinci-drug-formulary derivation: constraint name: CopayOption type: Extension elements: extension: {index: 0} url: type: uri pattern: {type: Uri, value: 'http://hl7.org/fhir/us/Davinci-drug-formulary/StructureDefinition/usdf-CopayOption-extension'} index: 1 valueCodeableConcept: type: CodeableConcept binding: {strength: required, valueSet: 'http://hl7.org/fhir/us/Davinci-drug-formulary/ValueSet/usdf-CopayOptionVS'} index: 2 package_version: 0.1.0 extensions: {} class: extension kind: complex-type url: http://hl7.org/fhir/us/Davinci-drug-formulary/StructureDefinition/usdf-CopayOption-extension base: http://hl7.org/fhir/StructureDefinition/Extension version: 0.1.0 required: [valueCodeableConcept]