This is the ValueSet that contains all the codes in PCT GFE Item NDC Value Set (http://hl7.org/fhir/us/davinci-pct/ValueSet/PCTGFEItemNDCVS) and PCT GFE Item NDC Value Set (http://hl7.org/fhir/us/davinci-pct/ValueSet/PCTGFEItemNDCVS). E.g. what you have to deal with if you get resources containing codes in either of them