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 c9ad2e8a-05d1-4fde-9d98-460e1ab4dcf1-947
This code system http://hl7.org/fhir/comparison/CodeSystem/c9ad2e8a-05d1-4fde-9d98-460e1ab4dcf1-947 defines codes, but no codes are represented here