This is the ValueSet that contains all the codes in Coverage Identifier Type (http://fhir.ch/ig/ch-orf/ValueSet/ch-orf-vs-coverageidentifiertype) and Coverage Identifier Type (http://fhir.ch/ig/ch-orf/ValueSet/ch-orf-vs-coverageidentifiertype). E.g. what you have to deal with if you get resources containing codes in either of them