description: A code identifying the reason for an opioid prescription package_name: hl7.fhir.us.pdmp.r4 derivation: constraint name: Opioid_Treatment_Code type: Extension elements: extension: {index: 0} url: pattern: {type: Uri, value: 'http://hl7.org/fhir/us/pdmp/StructureDefinition/pdmp-extension-opioid-treatment-code'} index: 1 value: short: Method of payment choices: [valueCoding] index: 3 valueCoding: {type: Coding, short: Method of payment, choiceOf: value, index: 4} package_version: 1.0.0-ballot extensions: {} class: extension kind: complex-type url: http://hl7.org/fhir/us/pdmp/StructureDefinition/pdmp-extension-opioid-treatment-code base: http://hl7.org/fhir/StructureDefinition/Extension version: 1.0.0-ballot required: [valueCoding, value]