Treatment of wrist, by arthroscopic means, including any of the following (if performed): (a) drilling of defect; (b) removal of loose bodies; (c) release of adhesions; (d) synovectomy; (e) debridement; (f) resection of dorsal or volar ganglia; other than a service associated with a service to which another item in this Schedule applies if the service described in the other item is for the purpose of performing an arthroscopic procedure of the wrist joint (H) (Anaes.) (Assist.)