Dr. Tsai is a licensed Internal Medicine in CA. Graduated in 1997. Medical degree obtained from American University of Caribbean School of Medicine - Coupecoy. Completed residency training at New York Hospital of Queens. Currently practices at William J. Tsai M.D. (William J. Tsai M.D.), located at 19742 MacArthur Blvd, Irvine, CA 92612. Dr. Tsai specializes in internal medicine and primary care.. In addition to English, Dr. Tsai speaks Taiwanese and Mandarin.