This is the ValueSet that contains all the codes in PCT ICD-10 Diagnostic Codes (http://hl7.org/fhir/us/davinci-pct/ValueSet/PCTDiagnosticCodes) and PCT ICD-10 Diagnostic Codes (http://hl7.org/fhir/us/davinci-pct/ValueSet/PCTDiagnosticCodes). E.g. what you have to deal with if you get resources containing codes in either of them