CPT® Code 73503

A radiologic examination of the hip, designated by CPT® Code 73503, involves imaging of either the left or right hip joint, and may also include the pelvis if performed. This procedure utilizes X-ray technology, which employs indirect ionizing radiation to create images of the internal structures of the body. The principle behind X-ray imaging is based on the varying densities and compositions of human tissues; as X-rays pass through the body, some are absorbed while others are transmitted, resulting in a two-dimensional representation of the anatomical structures. The images produced, known as radiographs, are crucial for diagnosing a variety of conditions affecting the hip, including but not limited to fractures, dislocations, deformities, degenerative bone diseases, osteomyelitis, arthritis, foreign bodies, infections, and tumors. In a typical examination, a minimum of four distinct views of the hip are captured to provide comprehensive visualization. The standard views often include the anteroposterior view, which is taken with the patient lying supine and the legs straight, slightly rotated inward. Another common view is the lateral 'frog-leg' position, where the hips are flexed and abducted, with the knees bent and the soles of the feet together. Additionally, a cross-table view may be performed, positioning the unaffected hip and knee at a 90-degree angle to allow the X-ray beam to be directed perpendicular to the long axis of the femur on the affected side. An alternative lateral view may also be taken with the hip flexed and abducted at 45 degrees. This comprehensive approach ensures that the radiologist has sufficient information to assess the hip joint thoroughly. For coding purposes, it is important to note that CPT® Code 73501 is used for a single view of the hip, while CPT® Code 73502 is applicable for 2-3 views; CPT® Code 73503 is specifically designated for examinations that include a minimum of four views.