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

<status value="active"/> <experimental value="false"/> <date value="2019-03-20T00:00:00-04:00"/> <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/"/> <content value="not-present"/> </CodeSystem>