CPT® Code 29879

Arthroscopy, knee, surgical; abrasion arthroplasty (includes chondroplasty where necessary) or multiple drilling or microfracture

The CPT® Code 29879 refers to a surgical procedure known as arthroscopy of the knee, specifically involving abrasion arthroplasty. This procedure is indicated for patients suffering from severe arthritis or osteochondral fractures, where the integrity of the knee joint is compromised. During the arthroscopy, small incisions, referred to as portal incisions, are made on the medial and lateral sides of the knee joint to allow for the introduction of an arthroscope, a specialized instrument that provides visualization of the internal structures of the knee. The procedure may also include chondroplasty, which is the surgical repair of damaged cartilage, as necessary. The primary goal of abrasion arthroplasty is to remove damaged articular cartilage and necrotic bone to promote healing and regeneration of the joint surface. This is achieved through the use of a motorized shaver and an abrader or burr, which effectively removes the unhealthy tissue until healthy, bleeding bone is exposed. Additionally, the procedure may involve drilling multiple holes into the underlying bone to stimulate a healing response, encouraging the formation of new cartilage. After the completion of the procedure, the instruments are withdrawn, and the incisions are closed, followed by the application of a compressive dressing to support the healing process.