This is the ValueSet that contains all the codes in EncounterTypes (https://nrces.in/ndhm/fhir/r4/ValueSet/ndhm-encounter-type) and EncounterTypes (https://nrces.in/ndhm/fhir/r4/ValueSet/ndhm-encounter-type). E.g. what you have to deal with if you get resources containing codes in either of them