Classification of OPCS codes relative to heart valve surgery
| Valve surgery | Aortic | Mitral | Pulmonary | Tricuspid | Unspecified valve |
| Repair | K26[589], K302, K312 | K25[589], K301, K311, K341, K38[123] | K28[589], K304, K314 | K27[5689], K303, K313, K342 | K30[89], K343 |
| Replacement | K26[1234] | K25[1234] | K28[1234] | K27[1234] | |
| Other | K346, K362 | K345, K361 | K31[89], K34[489] |