This is the ValueSet that contains all the codes in IVR valueset identification medium (.143.11.30) (http://fhir.ch/ig/ch-ems/ValueSet/IVR-VS-idMedium) and IVR Identification Medium (http://fhir.ch/ig/ch-ems/ValueSet/IVR-VS-idMedium). E.g. what you have to deal with if you get resources containing codes in either of them