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https://www.hl7.org/fhir/observation.html
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Resource – concept model mapping
Yellow rows denote SNOMED CT attributes where there is no specific FHIR counterpart.
| Resource element (CodeableConcept) | FHIR ValueSet | SNOMED CT attribute | SNOMED CT range | Comments |
|---|
Observation.category | https://www.hl7.org/fhir/valueset-observation-category.html#expansion |
|
| Use case for providing SNOMED mappings? |
| Observation.code | https://www.hl7.org/fhir/valueset-observation-codes.html#expansion |
| <<363787002|Observable entity| |
|
| Observation.Value.valueCodeableConcept |
|
| <<362981000|Qualifier value| MINUS <valueset for Observation.Interpretation> ?
| LB: why not also members from <<441742003 Evaluation finding JC: Because they decompose (in theory) into an Observable+Qualifier pair |
| Observation.Interpretation | HL7 Code | HL7 Code Display | SNOMED CT |
|---|
_GeneticObservationInterpretation CAR _ObservationInterpretationChange B D U W _ObservationInterpretationExceptions < > IE _ObservationInterpretationNormality A AA HH LL H HU L LU N _ObservationInterpretationSusceptibility I NCL NS R SYN-R S SDD SYN-S EX HX LX ObservationInterpretationDetection IND E NEG ND POS DET ObservationInterpretationExpectation EXP UNE ReactivityObservationInterpretation NR RR WR | GeneticObservationInterpretation Carrier ObservationInterpretationChange Better Significant change down Significant change up Worse ObservationInterpretationExceptions Off scale low Off scale high Insufficient evidence ObservationInterpretationNormality Abnormal Critical abnormal Critical high Critical low High Significantly high Low Significantly low Normal ObservationInterpretationSusceptibility Intermediate No CLSI defined breakpoint Non-susceptible Resistant Synergy - resistant Susceptible Susceptible-dose dependent Synergy - susceptible outside threshold above high threshold below low threshold ObservationInterpretationDetection Indeterminate Equivocal Negative Not detected Positive Detected ObservationInterpretationExpectation Expected Unexpected ReactivityObservationInterpretation Non-reactive Reactive Weakly reactive |
29679002|Carrier of disorder|
385425000|Improved| 442474009|Decreased relative to previous| 442387004|Increased relative to previous| 231877006|Worse|
263654008|Abnormal|
17621005|Normal|
264841006|Intermediately susceptible|
30714006|Resistant|
131196009|Susceptible|
394844007|Outside reference range| 281302008|Above reference range| 281300000|Below reference range|
82334004|Indeterminate| 42425007|Equivocal| 260385009|Negative| 260415000|Not detected| 10828004|Positive| 260373001|Detected|
131194007|Non-Reactive| 11214006|Reactive| 117006002|Weakly-reactive| |
| HL7 valueset (n=48) is extensible, so could add new expressivity as SNOMED codes if there were any gaps in existing list ... but that existing list is already relatively matured and 'metalled' by use, so that seem an unlikely requirement. Many of the existing members of the HL7 valuelist have obvious SNOMED equivalents, so there is scope for a mapping rather than a completely separate SNOMED-only valuelist. Mapping exercise may also reveal some holes in existing SNOMED expressivity. |