23472

Total Shoulder Arthroplasty

CPT 23472 describes a total shoulder arthroplasty (TSA), a complex orthopedic surgical procedure where both the humeral head (the 'ball' of the joint) and the glenoid (the 'socket') of the glenohumeral joint are replaced with prosthetic components. This procedure is primarily performed to treat advanced degenerative joint disease or severe structural damage that has not responded to conservative management. The surgical process typically begins with a deltopectoral incision to access the joint space. The surgeon then mobilizes the subscapularis muscle and performs a capsulotomy to expose the humeral head and glenoid. The humeral head is resected at a specific angle and height to match the patient's anatomy. The glenoid is then prepared by removing remaining cartilage and reaming the bone to create a smooth surface for the glenoid component, which may be secured with cement or through press-fit biological fixation. The humeral canal is prepared with rasps to accommodate the humeral stem, which supports the metallic or ceramic ball. In an anatomic TSA, the natural ball-and-socket configuration is maintained. In a reverse total shoulder arthroplasty (RTSA), the anatomy is inverted—the ball is placed on the glenoid side and the socket on the humeral side—which is often necessary for patients with massive, irreparable rotator cuff tears. The procedure aims to alleviate chronic pain, restore range of motion, and improve the overall quality of life for the patient. Post-operative care involves extensive physical therapy to optimize the functional outcomes of the prosthetic joint.

Clinical Indications

  • Primary osteoarthritis of the glenohumeral joint
  • Rheumatoid arthritis with joint destruction
  • Post-traumatic arthritis following severe shoulder fractures
  • Avascular necrosis (osteonecrosis) of the humeral head with glenoid involvement
  • Cuff tear arthropathy (typically requiring a reverse total shoulder approach)
  • Severe comminuted proximal humerus fractures where head preservation is impossible
  • Failure of previous shoulder hemiarthroplasty
  • Secondary osteoarthritis due to chronic instability or previous surgery

Procedure Steps

  1. Positioning the patient in a beach-chair or supine position and administering anesthesia.
  2. Making a deltopectoral incision, extending from the coracoid process toward the deltoid insertion.
  3. Identifying and protecting the cephalic vein while retracting the deltoid and pectoralis major muscles.
  4. Performing a tenotomy or 'peel' of the subscapularis tendon to gain access to the joint capsule.
  5. Dislocating the humeral head from the glenoid cavity.
  6. Resecting the humeral head using an oscillating saw at the level of the anatomical neck.
  7. Exposing the glenoid using specialized retractors and removing any remaining labral tissue or osteophytes.
  8. Reaming the glenoid to a bleeding bone surface to ensure proper seating of the prosthetic component.
  9. Implanting the glenoid component (polyethylene) using cement or a metal-backed 'press-fit' design.
  10. Preparing the humeral canal with sequential broaches to match the size of the humeral stem.
  11. Performing trial reduction with temporary components to check for stability, tension, and range of motion.
  12. Inserting the final humeral stem and head components.
  13. Repairing the subscapularis tendon back to the humerus using heavy non-absorbable sutures.
  14. Irrigating the surgical site and closing the incision in layers.

Coding Guidelines

  • CPT 23472 is used for the replacement of both the glenoid and humeral components.
  • If only one component is replaced (either the humeral head or the glenoid), use CPT 23470 (Arthroplasty, glenohumeral joint; hemiarthroplasty).
  • This code includes the removal of the existing joint surfaces; however, if a previous total shoulder prosthesis is being removed and replaced, refer to revision codes 23473 or 23474.
  • Do not report CPT 23472 in conjunction with debridement codes (e.g., 29822, 29823) in the same joint.
  • Rotator cuff repairs performed during the same operative session as a total shoulder arthroplasty are generally considered bundled and not separately reportable.
  • For bilateral procedures, append modifier 50 to the CPT code.
  • Assistant surgeon services (modifier 80) are typically covered and medically necessary given the complexity of the procedure.
  • Reverse total shoulder arthroplasty is also reported using 23472 as it involves both sides of the joint.

Associated ICD-10 Codes