This is the CodeSystem that contains all the codes in MedCom Message Codes (urn:oid:1.2.208.184.100.1) and MedCom Message Codes (urn:oid:1.2.208.184.100.1). E.g. what you have to deal with if you get resources containing codes in either of them
Generated Narrative: CodeSystem 557d853a-8aa7-4722-9b4a-6a18e06a68c1-386
This code system http://hl7.org/fhir/comparison/CodeSystem/557d853a-8aa7-4722-9b4a-6a18e06a68c1-386
defines codes, but no codes are represented here