<status value="active"/> <experimental value="false"/> <date value="2019-03-20T00:00:00-04:00"/> <publisher value="TBD - External Body"/> <contact> <name value="US Department of Veterans Affairs"/> </contact> <description value="VHA Enterprise Reference Terminology is based on CHI standard terminologies (e.g., SNOMED-CT, LOINC, HL7, NDF-RT, etc.) when available and on VHA own code sets when necessary (e.g., allergens). All concepts used within the VHA clinical environment receive a VHA Unique IDentifier or VUID. VHA Enterprise Reference Terminology complies with the semantics of the HL7 message structure"/> <content value="not-present"/> </CodeSystem>

This code system http://terminology.hl7.org/CodeSystem/VHA defines many codes, but they are not represented here