description: An identifier that designates a body structure such as a tumor and can be used for tracking the structure over time. package_name: hl7.fhir.us.mcode derivation: constraint name: BodyStructureIdentifier type: Identifier elements: use: pattern: {type: Code, value: usual} index: 0 type: pattern: type: CodeableConcept value: coding: - {code: BodyStructure, system: 'http://hl7.org/fhir/resource-types'} index: 1 value: {index: 2} package_version: 4.0.0-ballot class: complex-type kind: complex-type url: http://hl7.org/fhir/us/mcode/StructureDefinition/mcode-body-structure-identifier base: http://hl7.org/fhir/StructureDefinition/Identifier version: 4.0.0-ballot required: [value]