This is the ValueSet that contains all the codes in Prior Authorization Service Type Codes (X12) (http://hl7.org/fhir/us/davinci-pdex/ValueSet/PriorAuthServiceTypeCodes) and Prior Authorization Service Type Codes (X12) (http://hl7.org/fhir/us/davinci-pdex/ValueSet/PriorAuthServiceTypeCodes). E.g. what you have to deal with if you get resources containing codes in either of them