Don't let these additional code opportunities slip past. • +20930 -- Allograft for spine surgery only; morselized (List separately in addition to code for primary procedure) • +20931 -- ... structural (List separately in addition to code for primary procedure) • +22851 -- Application of intervertebral biomechanical device(s) (e.g., synthetic cage(s), threaded bone dowell(s), methylmethacrylate) to vertebral defect or interspace (List separately in addition to code for primary procedure) • +20936 -- Autograft for spine surgery only (includes harvesting the graft); local (e.g., ribs, spinous process, or laminar fragments) obtained from same incision (List separately in addition to code for primary procedure) • +20937 -- ... morselized (through separate skin or fascial incision) (List separately in addition to code for primary procedure) • +20938 -- ... structural, bicortical or tricortical (through separate skin or fascial incision) (List separately in addition to code for primary procedure).