Duplex scan of lower extremity arteries or arterial bypass grafts; complete bilateral. 93925 A complete duplex scan of the lower extremity arteries includes examination of the full length of the common femoral, superficial femoral and popliteal arteries. The iliac, deep femoral, and tibioperoneal arteries may also be examined. Duplex scan of lower extremity arteries or arterial bypass grafts; unilateral or limited study.