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

<status value="retired"/> <experimental value="false"/> <date value="2021-11-09T10:00:00+10:00"/> <publisher value="TBD - External Body"/> <contact> <name value="National Library of Medicine"/> </contact> <description value="UMLS codes as CUIs making up the values in a coding system. More information may be found at http://www.nlm.nih.gov/research/umls/"/> <caseSensitive value="true"/> <content value="not-present"/> </CodeSystem>