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  1. FHIR Specification Feedback
  2. FHIR-41096

Need guidance on Quantity Mapping

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Details

    • Icon: Change Request Change Request
    • Resolution: Persuasive
    • Icon: Medium Medium
    • US C-CDA on FHIR (FHIR)
    • 1.2.0-ballot
    • Cross-Group Projects
    • CF-immunization
      CF-medication
    • Mapping General and Structural Guidance
    • Hide

      Add quantity type to Structural Guidance.

      Show
      Add quantity type to Structural Guidance.
    • Jay Lyle/Floyd Eisenberg: 16-0-6
    • Enhancement
    • Non-substantive

    Description

      Both Immunizations and Medications map quantity values between C-CDA and FHIR, but there is no additional guidance on how this should be done. 

      CDA quantities contain a numeric value and a unit which SHALL be UCUM (at least by documentation in the schema and most C-CDA conformance statements).

      FHIR quantities contain a numeric value and unit / system / code attributes. At a minimum, CDA unit can populate the FHIR unit field. But since C-CDA should always be UCUM, we could go one step further and suggest mapping CDA's unit to FHIR's code and populating system with "http://unitsofmeasure.org".

      Also, similar to time guidance - indicate how to map the CDA's PQ vs IVL_PQ quantities to FHIR quantities.

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            Unassigned Unassigned
            benjamin Benjamin Flessner
            Benjamin Flessner
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              Created:
              Updated:
              Resolved: