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  1. FHIR Specification Feedback
  2. FHIR-31084

Mapping from LOINC scale type to FHIR data type

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    • Change Request
    • Status: Published (View Workflow)
    • Medium
    • Resolution: Persuasive with Modification

    Description

      Since this profile requires the use of LOINC codes I think we should explicitly document which Observation.value[x] data type to use based on the LOINC Type of Scale. I think it should go like this but I'm not sure if I have it exactly right.

      LOINC Scale Part FHIR Data Type
      Qn (Quantitative) Quantity, integer, Range, Ratio, time, dateTime, Period
      Ord (Ordinal) CodeableConcept
      Nom (Nominal) CodeableConcept
      Nar (Narrative) string
      OrdQn (Quantitative or Ordinal) CodeableConcept, Quantity, integer, Range, Ratio, time, dateTime, Period
      Multi (Multi)  
      Doc (Document)  

      For a precedent please see HL7 Version 2.5.1 Implementation Guide: Laboratory Results Interface, section 8.11.1 table 8-18. It provides an explicit mapping from LOINC scale types to allowed HL7 V2 data types. We ought to do the same thing for FHIR data types.

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              Unassigned Unassigned
              nradov Nick Radov
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