description: Indicates the laterality of the body structure. Only for use when laterality is needed to augment the Observation.bodySite in cases where the laterality is not expressed in the Observation.code and/or the use of BodyStructure will duplicate information for the anatomical structure. We are seeking feedback from implementers regarding the use of this extension. package_name: hl7.fhir.uv.extensions.r5 derivation: constraint name: StructureLaterality type: Extension elements: extension: {index: 0} url: pattern: {type: uri, value: 'http://hl7.org/fhir/StructureDefinition/observation-structureLaterality'} type: uri index: 1 value: choices: [valueCodeableConcept] index: 3 valueCodeableConcept: {type: CodeableConcept, choiceOf: value, index: 4} package_version: 5.3.0-ballot-tc extensions: {} class: extension kind: complex-type url: http://hl7.org/fhir/StructureDefinition/observation-structureLaterality base: http://hl7.org/fhir/StructureDefinition/Extension version: 5.3.0-ballot-tc required: [value, valueCodeableConcept]