http://hl7.org/fhir/StructureDefinition/observation-specimenCode|4.0.1
A code representing the the type of specimen used for this observation. Should only be used if not implicit in the code found in `Observation.code`.
Type: Extension (a.k.a: http://hl7.org/fhir/StructureDefinition/Extension)
Type dependencies: 2
Elements
extension: Extension
value[x]: CodeableConcept