description: 'NHS Data Dictionary: [GENERAL MEDICAL COUNCIL REFERENCE NUMBER](https://www.datadictionary.nhs.uk/attributes/general_medical_council_reference_number.html) which is a [CONSULTANT CODE](https://www.datadictionary.nhs.uk/data_elements/consultant_code.html)\r\n \r\n Format: ^[C]{1}[0-9]{7}$ (CNNNNNNN)\r\n \r\n \r\n FHIR Naming System [gmc-number](https://simplifier.net/ukfhircommunityassets/namingsystem-gmc-number)' package_name: fhir.r4.nhsengland.programme derivation: constraint name: EnglandIdentifierGeneralMedicalCouncilReferenceNumber type: Identifier elements: type: elements: coding: index: 0 elements: system: pattern: {type: uri, value: 'http://terminology.hl7.org/CodeSystem/v2-0203'} type: uri index: 1 code: pattern: {type: code, value: MD} type: code index: 2 required: [coding] system: pattern: {type: uri, value: 'https://fhir.hl7.org.uk/Id/gmc-number'} type: uri index: 3 value: {index: 4} package_version: 0.2.2-pre-release class: complex-type kind: complex-type url: https://fhir.nhs.uk/England/StructureDefinition/England-Identifier-General-Medical-Council-Reference-Number base: http://hl7.org/fhir/StructureDefinition/Identifier version: 0.0.1-current required: [system, value]