description: If the encountered was cancelled after it was planned, why? Applies only if the status is cancelled. package_name: rs/hl7.fhir.r2.core name: Explanation for cancellation type: null elements: extension: {name: extension, index: 0} url: type: uri pattern: {type: uri, value: 'http://hl7.org/fhir/StructureDefinition/encounter-reasonCancelled'} index: 1 value: choices: [valueCodeableConcept] index: 3 valueCodeableConcept: {type: CodeableConcept, choiceOf: value, index: 4} package_version: 1.0.2 extensions: {} class: datatype kind: datatype url: http://hl7.org/fhir/StructureDefinition/encounter-reasonCancelled version: null required: [value, valueCodeableConcept]