Question: Maine Subscriber Answer: You should report 93923 (Non-invasive physiologic studies of upper or lower extremity arteries, multiple levels or with provocative functional maneuvers, complete bilateral study [e.g., segmental blood pressure measurements, segmental Doppler waveform analysis, segmental volume plethysmography, segmental transcutaneous oxygen tension measurements, measurements with postural provocative tests,measurements with reactive hyperemia]) twice. Here's why: The same rule applies to 93922 (Noninvasive physiologic studies of upper or lower extremity arteries, single level, bilateral [eg, ankle/brachial indices, Doppler waveform analysis, volume plethysmography, transcutaneous oxygen tension measurement]). Single-level bilateral studies of the arms and legs merit two units of 93922.