Dr. Hsu is a licensed Internal Medicine in CA. Medical degree obtained from Ross University School of Medicine. Completed residency training at St. Vincent's Medical Center. Currently practices at Optum Care (Optum Care), located at 11101 La Reina Ave, Downey, CA 90241. Dr. Hsu specializes in internal medicine, primary care.. In addition to English, Dr. Hsu speaks Mandarin.