This page is part of the HL7 FHIR Implementation Guide Laboratory Report (v0.1.0: Release 1 Ballot 1) based on FHIR R4. This is the current published version in its permanent home (it will always be available at this URL). For a full list of available versions, see the Directory of published versions 
Mappings for the observation-grouping-it-lab resource profile.
| ObservationGroupingRefertoLabIt |
| Observation | OBX |
| identifier | OBX.21 For OBX segments from systems without OBX-21 support a combination of ORC/OBR and OBX must be negotiated between trading partners to uniquely identify the OBX segment. Depending on how V2 has been implemented each of these may be an option: 1) OBR-3 + OBX-3 + OBX-4 or 2) OBR-3 + OBR-4 + OBX-3 + OBX-4 or 2) some other way to uniquely ID the OBR/ORC + OBX-3 + OBX-4. |
| basedOn | ORC |
| partOf | Varies by domain |
| status | OBX-11 |
| category | |
| category (esame-laboratorio) | |
| coding | C*E.1-8, C*E.10-22 |
| system | C*E.3 |
| version | C*E.7 |
| code | C*E.1 |
| display | C*E.2 - but note this is not well followed |
| userSelected | Sometimes implied by being first |
| text | C*E.9. But note many systems use C*E.2 for this |
| category (specialita-esame-laboratorio) | |
| coding | C*E.1-8, C*E.10-22 |
| system | C*E.3 |
| version | C*E.7 |
| code | C*E.1 |
| display | C*E.2 - but note this is not well followed |
| userSelected | Sometimes implied by being first |
| text | C*E.9. But note many systems use C*E.2 for this |
| code | OBX-3 |
| coding | C*E.1-8, C*E.10-22 |
| system | C*E.3 |
| version | C*E.7 |
| code | C*E.1 |
| display | C*E.2 - but note this is not well followed |
| userSelected | Sometimes implied by being first |
| text | C*E.9. But note many systems use C*E.2 for this |
| subject | PID-3 |
| focus | OBX-3 |
| encounter | PV1 |
| effective[x] | OBX-14, and/or OBX-19 after v2.4 (depends on who observation made) |
| issued | OBR.22 (or MSH.7), or perhaps OBX-19 (depends on who observation made) |
| performer | OBX.15 / (Practitioner) OBX-16, PRT-5:PRT-4='RO' / (Device) OBX-18 , PRT-10:PRT-4='EQUIP' / (Organization) OBX-23, PRT-8:PRT-4='PO' |
| dataAbsentReason | N/A |
| note | NTE.3 (partner NTE to OBX, or sometimes another (child?) OBX) |
| bodySite | OBX-20 |
| method | OBX-17 |
| specimen | SPM segment |
| device | OBX-17 / PRT -10 |
| hasMember | Relationships established by OBX-4 usage |
| derivedFrom | Relationships established by OBX-4 usage |
| ObservationGroupingRefertoLabIt |
| Observation | Entity. Role, or Act, Observation[classCode=OBS, moodCode=EVN] |
| text | Act.text? |
| contained | N/A |
| extension | N/A |
| modifierExtension | N/A |
| identifier | id |
| basedOn | .inboundRelationship[typeCode=COMP].source[moodCode=EVN] |
| partOf | .outboundRelationship[typeCode=FLFS].target |
| status | status Amended & Final are differentiated by whether it is the subject of a ControlAct event with a type of "revise" |
| category | .outboundRelationship[typeCode="COMP].target[classCode="LIST", moodCode="EVN"].code |
| category (esame-laboratorio) | .outboundRelationship[typeCode="COMP].target[classCode="LIST", moodCode="EVN"].code |
| id | n/a |
| extension | n/a |
| coding | union(., ./translation) |
| id | n/a |
| extension | n/a |
| system | ./codeSystem |
| version | ./codeSystemVersion |
| code | ./code |
| display | CV.displayName |
| userSelected | CD.codingRationale |
| text | ./originalText[mediaType/code="text/plain"]/data |
| category (specialita-esame-laboratorio) | .outboundRelationship[typeCode="COMP].target[classCode="LIST", moodCode="EVN"].code |
| id | n/a |
| extension | n/a |
| coding | union(., ./translation) |
| id | n/a |
| extension | n/a |
| system | ./codeSystem |
| version | ./codeSystemVersion |
| code | ./code |
| display | CV.displayName |
| userSelected | CD.codingRationale |
| text | ./originalText[mediaType/code="text/plain"]/data |
| code | code |
| id | n/a |
| extension | n/a |
| coding | union(., ./translation) |
| id | n/a |
| extension | n/a |
| system | ./codeSystem |
| version | ./codeSystemVersion |
| code | ./code |
| display | CV.displayName |
| userSelected | CD.codingRationale |
| text | ./originalText[mediaType/code="text/plain"]/data |
| subject | participation[typeCode=RTGT] |
| focus | participation[typeCode=SBJ] |
| encounter | inboundRelationship[typeCode=COMP].source[classCode=ENC, moodCode=EVN] |
| effective[x] | effectiveTime |
| issued | participation[typeCode=AUT].time |
| performer | participation[typeCode=PRF] |
| dataAbsentReason | value.nullFlavor |
| note | subjectOf.observationEvent[code="annotation"].value |
| bodySite | targetSiteCode |
| method | methodCode |
| specimen | participation[typeCode=SPC].specimen |
| device | participation[typeCode=DEV] |
| hasMember | outBoundRelationship |
| derivedFrom | .targetObservation |
