Synovectomy of major tendon of ankle, for extensive synovitis by any method, including any of the following (if performed): (a) tenolysis; (b) debridement of ligament or tendon (or both); (c) release of ligament or tendon (or both); (d) excision of tubercule or osteophyte; (e) reconstruction of tendon retinaculum; (f) neurolysis; other than a service associated with a service to which item 30023 applies that is performed at the same site—each incision (H) (Anaes.) (Assist.)