Office of National Statistics
The ONS continues to maintain and publish a list of surgical (and now medical) procedures that were first published by the OPCS. These are known as the OPCS codes and the historical name has been kept. The procedure codes should not be confused with with the geographic area codes also produced by OPCS.
It is presently in its 4th revision, with previous versions published in 1950, 1969 and 1975. The 4th revision was first published in 1987, but a consolidated version was released in 1990. OPCS-4 has undergone further small revisions, denoted as 4.2, 4.3 and 4.4. Revision 4.5 is currently in progress.
The full document is available from the NHS Connecting for Health (see  or e-mail firstname.lastname@example.org). Licensing depends on the individual/organisation applying and the intended use of the codes.
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- ↑ A Brief History of the ONS accessed 20/7/2007
- ↑ Draft Code of Surgical Operations. General Register Office, London. HMSO, 1950
- ↑ Classification of Surgical Operations. Second Revision. General Register Office, London. HMSO, 1969
- ↑ Office of Population Censuses Surveys Classification of Surgical Operations. Third Revision. OPCS, London. HMSO, 1975
- ↑ Tabular List of the Classification of Surgical Operations and Procedures: Fourth Revision. OPCS 1990, ISBN 0116912952
- ↑ Hospital Episode Statistics web-site
- ↑ NHS Connecting for Health web-page on OPCS-4