CPT® Code 73501

A radiologic examination of the hip, designated by CPT® Code 73501, involves the use of X-ray imaging to capture detailed images of the hip joint on either the left or right side. This procedure may also include the pelvis when performed. X-ray technology utilizes 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, which affect how X-rays are absorbed or transmitted. As a result, some X-rays are absorbed by denser materials, such as bones, while others pass through less dense tissues, allowing for the creation of a two-dimensional image on a detector positioned behind the body. The primary purpose of this examination is to evaluate the hip joint for various conditions, including but not limited to fractures, dislocations, deformities, degenerative bone diseases, osteomyelitis, arthritis, foreign bodies, infections, or tumors. The standard views typically captured during this examination include the anteroposterior view, which is taken with the patient lying supine and the legs straight, slightly rotated inward. Additionally, the lateral 'frog-leg' view is performed with the hips flexed and abducted, and the knees flexed with the soles of the feet together. Another lateral view may be taken with the hip flexed at a 45-degree angle and abducted at 45 degrees, with the X-ray beam directed perpendicular to the table. For coding purposes, CPT® Code 73501 is specifically used for a single view X-ray examination of either the left or right hip. In contrast, CPT® Code 73502 is applicable for a hip examination on one side that includes 2-3 views, while CPT® Code 73503 is designated for examinations that consist of a minimum of 4 views taken of the hip joint.