This is the CodeSystem that contains all the codes in CommunicationCategory (http://terminology.hl7.org/CodeSystem/communication-category) and CommunicationCategory (http://terminology.hl7.org/CodeSystem/communication-category). E.g. what you have to deal with if you get resources containing codes in either of them
Generated Narrative: CodeSystem 582f0807-685d-46a2-93b4-207951e031ca-692
This code system http://hl7.org/fhir/comparison/CodeSystem/582f0807-685d-46a2-93b4-207951e031ca-692 defines codes, but no codes are represented here