CPT® Code 93930

A duplex scan of the upper extremity arteries or arterial bypass grafts is a comprehensive vascular ultrasound study designed to assess the condition and functionality of the blood vessels in the arms. This procedure employs both B-mode imaging and Doppler ultrasound techniques to provide a detailed evaluation. 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 placed on the skin, which generates real-time images of the arteries or any bypass grafts present. The Doppler component of the transducer is crucial as it measures the flow of blood within the arteries, providing insights into the direction and velocity of blood flow. The B-mode imaging utilizes ultrasonic sound waves that penetrate the skin and reflect off the arterial walls, creating visual representations of the vascular structures. Meanwhile, the Doppler probe detects sound waves that bounce off moving blood cells, converting these reflections into audible sounds. Changes in the pitch of these sounds can indicate variations in blood flow, such as reductions or complete obstructions. The data collected is processed by a computer, which produces color-enhanced video images that illustrate the speed and direction of blood flow, as well as any potential blockages. Additionally, spectral Doppler analysis is conducted to assess anatomical details and hemodynamic function, including the identification of 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 93930, while a unilateral or limited study is coded as 93931.