Revision of arthrodesis of extended ankle and hindfoot, by open or arthroscopic means, with internal or external fixation by any method, including any of the following (if performed): (a) capsulotomy; (b) joint release; (c) synovectomy; (d) removal of osteophytes at joint; (e) removal of hardware; (f) neurolysis; (g) osteotomy of non-union or malunion; other than a service associated with a service to which item 30023 applies that is performed at the same site (H) (Anaes.) (Assist.)