CPT® Code 70120

The CPT® Code 70120 refers to a radiologic examination of the mastoids, which are the bony structures located directly behind the ears. These mastoids play a crucial role in housing the middle and inner ear components. The examination involves the use of X-ray imaging, a technique that employs indirect ionizing radiation to create images of the internal structures of the body. X-rays are particularly effective for imaging non-uniform materials, such as human tissue, due to the varying densities and compositions present. This differential absorption of X-rays allows for the creation of a two-dimensional image, capturing the details of the structures within the mastoids. The specific code 70120 is applicable when fewer than three distinct X-ray images are obtained for each side of the mastoids. In contrast, for a more comprehensive examination that necessitates at least three different views per side, the CPT® Code 70130 should be utilized. The physician's review of the resulting radiographs is essential for identifying any pathological changes, such as those caused by chronic infections, that may affect the honeycomb-like bony architecture of the mastoids.