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Official Description

Radiologic examination, knee; both knees, standing, anteroposterior

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Common Language Description

A radiologic examination of the knee, specifically coded as CPT® Code 73565, involves imaging both knees while the patient is in a standing position, capturing anteroposterior (AP) views. This procedure utilizes X-ray technology, which employs indirect ionizing radiation to create images of the internal structures of the body. The X-ray process is effective on non-uniform materials, such as human tissue, due to the varying densities and compositions of the tissues involved. As X-rays pass through the body, some are absorbed while others are transmitted, resulting in a two-dimensional image that reveals the femur, tibia, fibula, patella, and surrounding soft tissues of the knee. The primary purpose of this examination is to investigate potential causes of knee-related symptoms such as pain, limping, or swelling. It is also instrumental in diagnosing various conditions, including fractures, dislocations, deformities, degenerative diseases, osteomyelitis, arthritis, foreign bodies, and cysts or tumors. Additionally, knee X-rays can be utilized to assess the alignment of lower extremity bones after fracture treatment. Standard imaging views for knee examinations include the anteroposterior (AP) view, lateral view (side), and posteroanterior (PA) view, with variations that may involve different flexion angles of the joint and consideration of weight-bearing versus non-weight-bearing positions. The specific code 73565 is designated for a weight-bearing X-ray examination of both knees, taken from front to back on a single film, distinguishing it from other codes that represent different views or configurations of knee imaging.

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