This is the Synthesized Terms of Clinical Terms Version 3 (CTV3).
Some CTV3 terms contain letters in square brackets (), which signify a link between the term and either the International Classification of Diseases (ICD-10) or the U.K. Office of Population Censuses and Surveys Classification of Surgical Operations and Procedures, Fourth Revision (OPCS-4). The letters and brackets were removed on the Synthesized Terms.
The Read Codes, now known as Clinical Terms, are included in the Metathesaurus. For more information about Read Codes in the Metathesaurus, see the CTV3 source synopsis.
Metathesaurus Update Frequency
The Synthesized Terms of CTV3 were last updated in the Metathesaurus in 2000.