CPT® Code 27831

The proximal tibiofibular joint is a critical synovial joint located at the back and side of the knee, specifically between the lateral condyle of the tibia and the head of the fibula. Synovial joints, such as this one, are characterized by their structure, which includes a joint cavity filled with synovial fluid, providing lubrication and reducing friction during movement. The surfaces of these joints are covered with hyaline cartilage or fibrocartilage, which aids in shock absorption and smooth articulation. Additionally, the stability of the proximal tibiofibular joint is maintained by a joint capsule and surrounding ligaments, which help to prevent dislocation and injury. In cases where dislocation occurs, closed treatment involves the application of manual pressure to realign the joint back to its normal anatomical position. This procedure is performed under anesthesia to ensure patient comfort and minimize pain during the manipulation. Following the successful reduction of the dislocation, which is confirmed through the use of radiographs that are reported separately, a splint or cast may be applied to immobilize the joint and facilitate proper healing. It is important to note that if the procedure is conducted without the need for general anesthesia, the appropriate code to use is 27830, whereas 27831 is designated for cases requiring general anesthesia.