CPT® Code 70330

The CPT® Code 70330 refers to a radiologic examination of the temporomandibular joint (TMJ), which is performed with both the mouth open and closed, and is conducted bilaterally. This diagnostic procedure utilizes X-ray technology to capture images of the TMJ, allowing healthcare professionals to assess the joint's condition. X-rays are a form of indirect ionizing radiation that penetrate the body and create images based on the varying densities of tissues. When X-rays pass through the body, some are absorbed by denser materials, such as bone, while others pass through less dense tissues, resulting in a two-dimensional representation of the internal structures. The primary purpose of this examination is to enable physicians to evaluate the TMJ for various abnormalities, including narrowing of the joint spaces, erosive changes in the articular surfaces, and irregularities in the contours of the condyle. These findings are crucial for diagnosing conditions such as degenerative joint disease, which is the most prevalent disorder affecting the TMJ. The procedure is essential for determining the appropriate treatment plan for patients experiencing TMJ-related symptoms. For unilateral examinations, the appropriate code is 70328, while 70330 is specifically designated for bilateral assessments.