CPT® Code 70130

The CPT® Code 70130 refers to a complete 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 taking a minimum of three X-ray views per side to ensure a comprehensive assessment. X-ray imaging utilizes indirect ionizing radiation to create images of the internal structures of the body. This imaging technique is particularly effective on non-uniform materials, such as human tissue, due to the varying densities and compositions present. As X-rays pass through the body, some are absorbed while others are transmitted, allowing for the capture of images on a detector, resulting in a two-dimensional representation of the anatomical structures. It is important to note that if fewer than three distinct X-ray images are obtained for each side, the appropriate code to report would be 70120. The primary purpose of the complete examination coded as 70130 is to enable the physician to evaluate the radiographs for any pathological changes, such as chronic infections, that may affect the honeycomb-like bony architecture of the mastoids.