Mappings / OBX
OBX to Observation
OBX to Observation. FHIR R4 targets: Observation. See the v2-to-FHIR IG.
OBX-2 and OBX-5 choose a single FHIR value[x] at runtime. SN uses Quantity / Ratio / Range. ED Base64 uses the R5 Observation.valueAttachment extension. OBX-6 only attaches to Quantity, never as a second value[x]. Empty OBX-3 becomes Observation.code with data-absent-reason unknown — valid R4, not an invented code.
| HL7 field | FHIR path | Transform |
|---|---|---|
| OBX-3 | Observation.code | cwe-to-codeableconcept |
| OBX-8 | Observation.interpretation[0].text | identity |
| OBX-14 | Observation.effectiveDateTime | ts-to-datetime |
Intentionally dropped
- OBX-18 — Equipment instance identifier has no standard Observation target in v1