CPT® Code 29906

The subtalar joint is a critical component of the ankle, located between the talus and the calcaneus bones. This joint is classified as a compound joint, which means it consists of multiple articulating surfaces and is divided into two distinct compartments. These compartments are separated by a space that contains important ligaments, specifically the talocalcaneal and cervical ligaments, which play a vital role in stabilizing the joint. The procedure described by CPT® Code 29906 involves arthroscopy of the subtalar joint, which is a minimally invasive surgical technique used to visualize and treat conditions affecting this joint. During the procedure, the joint is first distracted to create space between the joint surfaces, allowing for better visualization. An arthroscope, a specialized instrument equipped with a camera, is then inserted through small incisions, or portals, to examine the joint thoroughly. The surgeon looks for any abnormalities in the articular cartilage, which is the smooth tissue that covers the ends of bones in the joint. If any irregularities are detected, the surgeon may probe the cartilage to assess its condition further. The procedure includes the removal of any abnormal tissue using a burr, which is a tool designed for debridement. After the debridement, the joint is irrigated to clear away any debris, and the arthroscope is withdrawn. To promote optimal healing post-surgery, the foot is positioned in a neutral plantigrade position, with the heel angled slightly outward (five to ten degrees of valgus), and a brace or splint is applied to support the joint during recovery.