OPCS-4 is the clinical coding classification of interventions and procedures undertaken within the NHS in England. It is updated every three years, reflecting current clinical practice to be used for statistical purposes and reimbursement. On April 1, 2023, a new version (OPCS-4.10) came into force. A total of 236 new four-character codes were introduced in multiple areas, including cardiovascular, endoscopy, ENT, gastrointestinal, urology, neurology, gynecology, breast reconstruction, and others.