description: Provides a link to an assessment of prognosis or risk as informed by the diagnostic results (For example, genetic results and possibly by patient genetic family history information). This extension is used when need RiskAssessment as an alternate choice for `Observation.hasMember` or `DiagnosticReport.result`. package_name: hl7.fhir.uv.extensions.r5 derivation: constraint name: DRRisk type: Extension elements: extension: {index: 0} url: pattern: {type: Uri, value: 'http://hl7.org/fhir/StructureDefinition/diagnosticReport-risk'} index: 1 value: choices: [valueReference] index: 3 valueReference: type: Reference choiceOf: value refers: ['http://hl7.org/fhir/StructureDefinition/RiskAssessment'] index: 4 package_version: 5.2.0 extensions: {} class: extension kind: complex-type url: http://hl7.org/fhir/StructureDefinition/diagnosticReport-risk base: http://hl7.org/fhir/StructureDefinition/Extension version: 5.2.0 required: [valueReference, value]