Question: Which CPT code should I report for a torn pectoralis major muscle repair? South Dakota Subscriber Answer: Although many coders use an unlisted musculoskeletal surgery code, you have a more specific option: 24341 (Repair, tendon or muscle, upper arm or elbow, each tendon or muscle, primary or secondary [excludes rotator cuff]). Experts recommend 24341 because the pectoralis major attaches to the humerus.