This is the ValueSet that contains all the codes in Type of plan contact (http://hl7.org/fhir/us/davinci-drug-formulary/ValueSet/PlanContactTypeVS) and Type of plan contact (http://hl7.org/fhir/us/davinci-drug-formulary/ValueSet/PlanContactTypeVS). E.g. what you have to deal with if you get resources containing codes in either of them