CPT® Code 21116

An injection procedure for temporomandibular joint arthrography involves a series of steps designed to visualize the temporomandibular joint (TMJ) using imaging techniques. This procedure is essential for diagnosing various conditions affecting the TMJ, which is the joint connecting the jawbone to the skull. The process begins with the cleansing of the skin at the injection site to minimize the risk of infection. Following this, a local anesthetic is administered to ensure patient comfort during the procedure. A needle is then carefully inserted into the TMJ, allowing for the aspiration of any existing fluid within the joint space. This step is crucial as it prepares the joint for the introduction of a radiopaque substance, which is a contrast agent that enhances the visibility of the joint in imaging studies. The radiopaque substance is injected into the joint, and the joint is then exercised to facilitate even distribution of the contrast material. This distribution is vital for obtaining clear and accurate radiographic images, which are essential for further evaluation and diagnosis. Once the contrast has been adequately distributed, radiographic images are obtained, which may be reported separately for comprehensive analysis of the joint's condition.