CPT® Code 73564

A radiologic examination of the knee, designated by CPT® Code 73564, involves a comprehensive imaging process that captures detailed views of the knee joint and surrounding structures. This examination typically includes four or more X-ray images, which provide a thorough assessment of the femur, tibia, fibula, patella, and associated soft tissues. The X-ray imaging technique utilizes indirect ionizing radiation to create images of the internal anatomy. 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 rays are absorbed by denser materials, while others are transmitted through, resulting in a two-dimensional representation of the anatomical structures on a detector. The primary purpose of conducting a complete knee X-ray examination is to investigate the underlying causes of symptoms such as pain, limping, or swelling. Additionally, this imaging modality is instrumental in diagnosing various conditions, including fractures, dislocations, deformities, degenerative diseases, osteomyelitis, arthritis, foreign bodies, and the presence of cysts or tumors. Furthermore, knee X-rays are essential in evaluating the alignment of lower extremity bones post-fracture treatment, ensuring that healing is progressing appropriately. Standard views captured during this examination include the anteroposterior (AP) view, which is taken from front to back, the lateral view, which provides a side perspective, and the posteroanterior (PA) view, taken from back to front. Variations in joint flexion and the patient's weight-bearing status may also be incorporated into the imaging protocol to enhance diagnostic accuracy. For less comprehensive examinations, CPT® Code 73560 is applicable for X-ray exams of the knee in one or two views, while CPT® Code 73562 is designated for three views. In contrast, CPT® Code 73564 specifically denotes a complete X-ray examination of the knee with four or more views, providing a more extensive evaluation of the knee joint and its surrounding structures.