Stabilisation of patellofemoral joint of knee, by combined open and arthroscopic means, including either or both of the following (if performed): (a) medial soft tissue reconstruction and tendon transfer; (b) tibial tuberosity transfer with bone graft and internal fixation; other than a service associated with a service to which another item of this Schedule applies if the service described in the other item is for the purpose of performing a procedure on the knee by arthroscopic means (H) (Anaes.) (Assist.)