This is the CodeSystem that contains all the codes in Cited Medium (http://terminology.hl7.org/CodeSystem/cited-medium) and Cited Medium (http://terminology.hl7.org/CodeSystem/cited-medium). E.g. what you have to deal with if you get resources containing codes in either of them
Generated Narrative: CodeSystem b39d974e-2b72-42ac-95a6-171d2985af14-176
This code system http://hl7.org/fhir/comparison/CodeSystem/b39d974e-2b72-42ac-95a6-171d2985af14-176 defines codes, but no codes are represented here