CPT® Code 29905

The procedure described by CPT® Code 29905 refers to an arthroscopic surgical intervention performed on the subtalar joint, which is located in the lower ankle between the talus and the calcaneus bones. This joint is classified as a compound joint, meaning it consists of multiple components and is divided into two distinct compartments. The separation of these compartments is facilitated by the presence of the talocalcaneal and cervical ligaments. During the procedure, the surgeon first distracts the joint to create space between the joint surfaces, which enhances visibility and access to the entire joint structure. Following this, two or three access portals are established to allow for thorough examination of the joint. The primary focus of the surgery is to identify and remove any diseased or hypertrophic synovium, which is the connective tissue lining the joint. A specialized instrument known as a shaver is utilized to excise the abnormal synovium effectively. After the synovectomy, the joint is irrigated to clear out any debris, ensuring a clean surgical site. To promote optimal healing post-surgery, the foot is positioned in a neutral plantigrade stance, with the heel angled between five to ten degrees of valgus. Finally, a brace or splint is applied to stabilize the joint during the recovery process.