This code system http://terminology.hl7.org/CodeSystem/rcV2 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="Paul Frosdick, NHS Information Authority"/> </contact> <description value="The Read Codes Version 2 contains over 70,000 coded concepts arranged in a hierarchical structure. Top level hierarchy sections: Disorders Findings Surgical procedures Investigations Occupations Drugs"/> <content value="not-present"/> </CodeSystem>