description: The specific diagnostic investigations that are requested as part of this request. Sometimes, there can only be one item per request, but in most contexts, more than one investigation can be requested. package_name: hl7.fhir.uv.extensions.r4 derivation: constraint name: Item type: Extension elements: extension: type: Extension short: Code to indicate the item (test, panel or sequence variant) being ordered index: 0 slicing: slices: code: match: {} schema: type: Extension short: Code to indicate the item (test, panel or sequence variant) being ordered _required: true index: 0 extensions: {} elements: extension: {index: 1} url: type: uri pattern: {type: Uri, value: code} index: 2 value: choices: [valueCodeableConcept] index: 4 valueCodeableConcept: {type: CodeableConcept, choiceOf: value, index: 5} required: [value, valueCodeableConcept] geneticsObservation: match: {} schema: type: Extension short: Indicate the genetic variant ordered to be tested index: 6 extensions: {} elements: extension: {index: 7} url: type: uri pattern: {type: Uri, value: geneticsObservation} index: 8 value: choices: [valueReference] index: 10 valueReference: type: Reference choiceOf: value refers: ['http://hl7.org/fhir/StructureDefinition/Observation'] index: 11 required: [valueReference, value] specimen: match: {} schema: type: Extension short: If this item relates to specific specimens index: 12 extensions: {} elements: extension: {index: 13} url: type: uri pattern: {type: Uri, value: specimen} index: 14 value: choices: [valueReference] index: 16 valueReference: type: Reference choiceOf: value refers: ['http://hl7.org/fhir/StructureDefinition/Specimen'] index: 17 required: [valueReference, value] status: match: {} schema: type: Extension short: proposed | draft | planned | requested | received | accepted | in-progress | review | completed | cancelled | suspended | rejected | failed index: 18 extensions: {} elements: extension: {index: 19} url: type: uri pattern: {type: Uri, value: status} index: 20 value: choices: [valueCode] index: 22 valueCode: {type: code, choiceOf: value, index: 23} required: [valueCode, value] url: pattern: {type: Uri, value: 'http://hl7.org/fhir/StructureDefinition/servicerequest-geneticsItem'} index: 24 value: choices: [] index: 26 package_version: 5.3.0-ballot extensions: code: url: null type: Extension short: Code to indicate the item (test, panel or sequence variant) being ordered _required: true index: 0 extensions: {} elements: extension: {index: 1} url: type: uri pattern: {type: Uri, value: code} index: 2 value: choices: [valueCodeableConcept] index: 4 valueCodeableConcept: {type: CodeableConcept, choiceOf: value, index: 5} required: [value, valueCodeableConcept] geneticsObservation: url: null type: Extension short: Indicate the genetic variant ordered to be tested index: 6 extensions: {} elements: extension: {index: 7} url: type: uri pattern: {type: Uri, value: geneticsObservation} index: 8 value: choices: [valueReference] index: 10 valueReference: type: Reference choiceOf: value refers: ['http://hl7.org/fhir/StructureDefinition/Observation'] index: 11 required: [valueReference, value] specimen: url: null type: Extension short: If this item relates to specific specimens index: 12 extensions: {} elements: extension: {index: 13} url: type: uri pattern: {type: Uri, value: specimen} index: 14 value: choices: [valueReference] index: 16 valueReference: type: Reference choiceOf: value refers: ['http://hl7.org/fhir/StructureDefinition/Specimen'] index: 17 required: [valueReference, value] status: url: null type: Extension short: proposed | draft | planned | requested | received | accepted | in-progress | review | completed | cancelled | suspended | rejected | failed index: 18 extensions: {} elements: extension: {index: 19} url: type: uri pattern: {type: Uri, value: status} index: 20 value: choices: [valueCode] index: 22 valueCode: {type: code, choiceOf: value, index: 23} required: [valueCode, value] class: extension kind: complex-type url: http://hl7.org/fhir/StructureDefinition/servicerequest-geneticsItem base: http://hl7.org/fhir/StructureDefinition/Extension version: 5.3.0-ballot required: [extension]