<status value="retired"/> <experimental value="false"/> <date value="2021-02-23"/> <description value="The HCFA Procedure Codes (HCPCS) as originally defined includes three levels of codes. Level I includes CPT codes, Level II includes HCPCS Level II codes, and Level III includes codes that have not been valid since 2003. CPT and HCPCS Level II have their own identifiers. Therefore, this identifier should never be used in current electronic interchange and is maintained for historical reference only."/> <caseSensitive value="true"/> <hierarchyMeaning value="is-a"/> <content value="not-present"/> </CodeSystem>

This case-sensitive code system http://terminology.hl7.org/CodeSystem/HCPCS-all-codes defines codes in a Is-A heirarchy, but no codes are represented here