CPT® Code 93925

A duplex scan of lower extremity arteries or arterial bypass grafts is a comprehensive vascular ultrasound study designed to assess the condition of the arteries in the legs or any previously placed arterial bypass grafts. This procedure employs both B-mode imaging and Doppler ultrasound techniques to provide a detailed evaluation of blood flow and vascular anatomy. During the examination, a clear gel is applied to the skin over the area of interest to facilitate the transmission of sound waves. A B-mode transducer is then positioned on the skin, generating real-time images of the arteries or grafts. Concurrently, a Doppler probe integrated within the B-mode transducer captures information regarding the direction and velocity of blood flow within the arteries. The B-mode imaging utilizes ultrasonic sound waves that penetrate the skin and reflect off the arterial walls, allowing for visualization of the vascular structures. The Doppler component measures the frequency changes in the sound waves that bounce off moving blood cells, which helps in assessing blood flow dynamics. If there is a reduction in blood flow, the pitch of the sound waves will alter, and in cases of complete obstruction, the sound may cease entirely. The data collected is processed by a computer, which generates color-coded images that illustrate the speed and direction of blood flow, as well as any potential blockages. Additionally, spectral Doppler analysis is conducted to evaluate anatomical details and hemodynamic function, providing insights into conditions such as arterial narrowing and plaque buildup. Following the procedure, the physician interprets the results and documents the findings in a written report. For a complete bilateral study, the appropriate code to use is 93925, while a unilateral or limited study is coded as 93926.