The subsumption relationship between code/Coding "A" and code/Coding "B". There are 4 possible codes to be returned: equivalent, subsumes, subsumed-by, and not-subsumed. If the server is unable to determine the relationship between the codes/Codings, then it returns an error (i.e. an OperationOutcome).
This value set includes codes from the following code systems:
http://hl7.org/fhir/concept-subsumption-outcome