Dr. Dai is a licensed Internal Medicine in MO. Graduated in 2013. Medical degree obtained from Washington University School of Medicine. Completed residency training at BJC Healthcare,. Currently practices at Washington University Medicine (Washington University Medicine), located at 3015 North Ballas Rd, Saint Louis, MO 63131. Dr. Dai specializes in internal medicine, primary care.. In addition to English, Dr. Dai speaks Mandarin and accepts new patients.