Dr. Chen is a licensed Internal Medicine in CA. Graduated in 1985. Medical degree obtained from Shanghai, Fudan Univ. Shanghai Medical College in China. Completed residency training at St. John's Episcopal Hospital-South. Currently practices at Optum Care (Optum Care), located at 18780 Amar Rd, Walnut, CA 91789. Dr. Chen specializes in internal medicine and primary care.. In addition to English, Dr. Chen speaks Mandarin.