CPT 29827 describes a surgical arthroscopy of the shoulder specifically to perform a rotator cuff repair. The procedure is performed using a series of small percutaneous portals, typically starting with a posterior portal for the arthroscope to visualize the glenohumeral joint. The surgeon examines the labrum, biceps tendon, and articular surfaces before moving into the subacromial space. The rotator cuff consists of the supraspinatus, infraspinatus, teres minor, and subscapularis. Tears in these tendons can lead to significant pain and weakness, often resulting from acute injury or chronic degeneration. Once the tear is identified, the surgeon uses a shaver and radiofrequency device to debride non-viable tissue and clear the subacromial bursa for better visualization. The humeral head's greater tuberosity, known as the footprint, is prepared by lightly abrading the bone to create a healing response through marrow stimulation. Suture anchors—small devices made of titanium, PEEK, or bio-composite materials—are inserted into the footprint. Using specialized suture passing instruments, the surgeon retrieves the sutures through the tendon in various configurations, such as mattress or simple stitches. These sutures are then tensioned and secured using either arthroscopic knot-tying techniques or knotless fixation devices. This process effectively reapposes the tendon to the bone to facilitate biological healing. The complexity can vary based on tear shape (crescent, U-shaped, or L-shaped) and the degree of tendon retraction. This arthroscopic approach offers the advantages of smaller incisions, less deltoid muscle trauma, and a more comprehensive evaluation of the joint compared to open techniques.