This is the CodeSystem that contains all the codes in Example Diagnosis Related Group Codes (http://terminology.hl7.org/CodeSystem/ex-diagnosisrelatedgroup) and Example Diagnosis Related Group Codes (http://terminology.hl7.org/CodeSystem/ex-diagnosisrelatedgroup). E.g. what you have to deal with if you get resources containing codes in either of them
Generated Narrative: CodeSystem f90bd0a2-fe48-4d1e-ba12-6375efeecd69-452
This code system http://hl7.org/fhir/comparison/CodeSystem/f90bd0a2-fe48-4d1e-ba12-6375efeecd69-452 defines codes, but no codes are represented here