description: This extension allows for the representation of copay details as strings. This can be passed as part of the Coverage resource where payors need to communicate costToBeneficiary details that cannot be expressed as SimpleQuantity or Money data types. package_name: hl7.fhir.us.insurance derivation: constraint name: BeneficiaryCostString type: Extension elements: extension: {index: 0} url: pattern: {type: Uri, value: 'http://hl7.org/fhir/us/insurance-card/StructureDefinition/C4DIC-BeneficiaryCostString-extension'} index: 1 value: choices: [valueString] index: 3 valueString: {type: string, choiceOf: value, index: 4} package_version: card-1.0.0 extensions: {} class: extension kind: complex-type url: http://hl7.org/fhir/us/insurance-card/StructureDefinition/C4DIC-BeneficiaryCostString-extension base: http://hl7.org/fhir/StructureDefinition/Extension version: 1.0.0 required: [valueString, value]