This is the CodeSystem that contains all the codes in Example Diagnosis on Admission Codes (http://terminology.hl7.org/CodeSystem/ex-diagnosis-on-admission) and Example Diagnosis on Admission Codes (http://terminology.hl7.org/CodeSystem/ex-diagnosis-on-admission). E.g. what you have to deal with if you get resources containing codes in either of them
Generated Narrative: CodeSystem 7ce0a400-f46c-450c-9a9a-e539c78d0b35-395
This code system http://hl7.org/fhir/comparison/CodeSystem/7ce0a400-f46c-450c-9a9a-e539c78d0b35-395 defines codes, but no codes are represented here