Observation.code is a CodeableConcept . Thus, you can set its "text" element with the local display name of the code, in addition to the LOINC coding.

Hi Hilla,

If you are referring to Observation.code or Observation.component.code than a short answer will be yes, of course you can, since those elements are of the type CodeableConcept that contains an array of the Coding datatype specifically for this reason. One thing that is not clear from your question is why the additional coding you want to use is a urn:oid, since this is usually used to identify objects, not concepts (at least as far as I know). So I would suggest you make sure the OID you are trying to use is really a concept identifier, and not an object/instance identifier. The different codings used in a single CodeableConcept SHALL mean the same thing. Usually the use of this is for local code systems, and those usually are not composed of OID's.

If you can make clear exactly how you want to use oid's here and what is the semantic meaning behind them, it would be great.