This is the CodeSystem that contains all the codes in Coverage Class Codes (http://terminology.hl7.org/CodeSystem/coverage-class) and Coverage Class Codes (http://terminology.hl7.org/CodeSystem/coverage-class). E.g. what you have to deal with if you get resources containing codes in either of them
Generated Narrative: CodeSystem b9af8e40-c632-44bd-9daa-82642c2bb7e7-836
This code system http://hl7.org/fhir/comparison/CodeSystem/b9af8e40-c632-44bd-9daa-82642c2bb7e7-836 defines codes, but no codes are represented here