Thanks for your question.
You have asked codes for many procedures and provided very less information. So depending upon this, please find below codes and you may choose appropriate codes depending upon your medical record's documentation. Also check CCI edit and bill accordingly.
24635-Open treatment of Monteggia type of fracture dislocation at elbow (fracture proximal end of ulna with dislocation of radial head), includes internal fixation, when performed
24685-Open treatment of ulnar fracture, proximal end (eg, olecranon or coronoid process[es]), includes internal fixation, when performed
20932-20934 - for allograft
+20932-Allograft, includes templating, cutting, placement and internal fixation, when performed; osteoarticular, including articular surface and contiguous bone (List separately in addition to code for primary procedure)
24343-Repair lateral collateral ligament, elbow, with local tissue
24344-Reconstruction lateral collateral ligament, elbow, with tendon graft (includes harvesting of graft)
64718-Neuroplasty and/or transposition; ulnar nerve at elbow
Please feel free to write if you have any question.