description: Entire body surface area, either measured or calculated. package_name: hl7.fhir.us.mcode derivation: constraint name: BodySurfaceArea type: Observation elements: code: pattern: type: CodeableConcept value: coding: - {code: 8277-6, system: 'http://loinc.org'} index: 0 value: choices: [valueQuantity] index: 2 valueQuantity: {type: Quantity, choiceOf: value, index: 3} package_version: 4.0.0 class: profile kind: resource url: http://hl7.org/fhir/us/mcode/StructureDefinition/mcode-body-surface-area base: http://hl7.org/fhir/us/core/StructureDefinition/us-core-vital-signs version: 4.0.0