This is the ValueSet that contains all the codes in C4BB Ambulance Transport Reasons Value Set (http://hl7.org/fhir/us/carin-bb/ValueSet/C4BBAmbulanceTransportReasonCodes) and C4BB Ambulance Transport Reasons Value Set (http://hl7.org/fhir/us/carin-bb/ValueSet/C4BBAmbulanceTransportReasonCodes). E.g. what you have to deal with if you get resources containing codes in either of them