HSAI FHIR Implementation Guide
0.1.0 - CI Build Netherlands

HSAI FHIR Implementation Guide - Local Development build (v0.1.0) built by the FHIR (HL7® FHIR® Standard) Build Tools. See the Directory of published versions

## Resource Profile: CDTObservation - Mappings

Active as of 2026-02-09

Mappings for the cdt-observation resource profile.

### Mappings for Workflow Pattern (http://hl7.org/fhir/workflow)

CDTObservation
Observation | Event
identifier | Event.identifier
basedOn | Event.basedOn
partOf | Event.partOf
status | Event.status
code | Event.code
subject | Event.subject
encounter | Event.context
effective[x] | Event.occurrence[x]
performer | Event.performer.actor

### Mappings for SNOMED CT Concept Domain Binding (http://snomed.info/conceptdomain)

CDTObservation
Observation | < 363787002 |Observable entity|
status | < 445584004 |Report by finality status|
code | < 363787002 |Observable entity| OR < 386053000 |Evaluation procedure|
value[x] | < 441742003 |Evaluation finding|
interpretation | < 260245000 |Findings values|
bodySite | < 123037004 |Body structure|
specimen | < 123038009 |Specimen|
device | < 49062001 |Device|
referenceRange |
type | < 260245000 |Findings values| OR < 365860008 |General clinical state finding| OR < 250171008 |Clinical history or observation findings| OR < 415229000 |Racial group| OR < 365400002 |Finding of puberty stage| OR < 443938003 |Procedure carried out on subject|
appliesTo | < 260245000 |Findings values| OR < 365860008 |General clinical state finding| OR < 250171008 |Clinical history or observation findings| OR < 415229000 |Racial group| OR < 365400002 |Finding of puberty stage| OR < 443938003 |Procedure carried out on subject|
component |
code | < 363787002 |Observable entity| OR < 386053000 |Evaluation procedure|
value[x] | 363714003 |Interprets| < 441742003 |Evaluation finding|
interpretation | < 260245000 |Findings values|

### Mappings for HL7 v2 Mapping (http://hl7.org/v2)

CDTObservation
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.
use | N/A
type | CX.5
system | CX.4 / EI-2-4
value | CX.1 / EI.1
period | CX.7 + CX.8
assigner | CX.4 / (CX.4,CX.9,CX.10)
basedOn | ORC
partOf | Varies by domain
status | OBX-11
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'
value[x] | OBX.2, OBX.5, OBX.6
dataAbsentReason | N/A
interpretation | OBX-8
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
referenceRange | OBX.7
low | OBX-7
high | OBX-7
type | OBX-10
appliesTo | OBX-10
text | OBX-7
hasMember | Relationships established by OBX-4 usage
derivedFrom | Relationships established by OBX-4 usage
component | containment by OBX-4?
code | OBX-3
value[x] | OBX.2, OBX.5, OBX.6
dataAbsentReason | N/A
interpretation | OBX-8
referenceRange | OBX.7

### Mappings for RIM Mapping (http://hl7.org/v3)

CDTObservation
Observation | Entity. Role, or Act, Observation[classCode=OBS, moodCode=EVN]
text | Act.text?
contained | N/A
modifierExtension | N/A
identifier | id
id | n/a
extension | n/a
use | Role.code or implied by context
type | Role.code or implied by context
system | II.root or Role.id.root
value | II.extension or II.root if system indicates OID or GUID (Or Role.id.extension or root)
period | Role.effectiveTime or implied by context
assigner | II.assigningAuthorityName but note that this is an improper use by the definition of the field. Also Role.scoper
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
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]
value[x] | value
dataAbsentReason | value.nullFlavor
interpretation | interpretationCode
note | subjectOf.observationEvent[code="annotation"].value
bodySite | targetSiteCode
method | methodCode
specimen | participation[typeCode=SPC].specimen
device | participation[typeCode=DEV]
referenceRange | outboundRelationship[typeCode=REFV]/target[classCode=OBS, moodCode=EVN]
id | n/a
extension | n/a
modifierExtension | N/A
low | value:IVL_PQ.low
high | value:IVL_PQ.high
type | interpretationCode
appliesTo | interpretationCode
age | outboundRelationship[typeCode=PRCN].targetObservationCriterion[code="age"].value
text | value:ST
hasMember | outBoundRelationship
derivedFrom | .targetObservation
component | outBoundRelationship[typeCode=COMP]
id | n/a
extension | n/a
modifierExtension | N/A
code | code
value[x] | value
dataAbsentReason | value.nullFlavor
interpretation | interpretationCode
referenceRange | outboundRelationship[typeCode=REFV]/target[classCode=OBS, moodCode=EVN]

### Mappings for FiveWs Pattern Mapping (http://hl7.org/fhir/fivews)

CDTObservation
Observation |
identifier | FiveWs.identifier
status | FiveWs.status
category | FiveWs.class
code | FiveWs.what[x]
subject | FiveWs.subject[x], FiveWs.subject
focus | FiveWs.subject[x], FiveWs.subject
encounter | FiveWs.context
effective[x] | FiveWs.done[x]
issued | FiveWs.recorded
performer | FiveWs.actor
component |
code | FiveWs.what[x]

### Mappings for SNOMED CT Attribute Binding (http://snomed.org/attributebinding)

CDTObservation
Observation |
code | 116680003 |Is a|
value[x] | 363714003 |Interprets|
interpretation | 363713009 |Has interpretation|
bodySite | 718497002 |Inherent location|
specimen | 704319004 |Inherent in|
device | 424226004 |Using device|
component |
value[x] | 363714003 |Interprets|
interpretation | 363713009 |Has interpretation|