DAVID R DUNCAN JR, MD is categorized under PHYSICIANS & SURGEONS specializing in EMERGENCY MEDICINE and located at 301 County Airpt. Rd. # 105 in or near the Vacaville, CA area. Find additional information including website, e-mail, map, and directions - OriginalYP.com®. Find additional PHYSICIANS & SURGEONS at MedicalYP.com ®.