Dr. Chien is a licensed Internal Medicine in CA. Graduated in 1990. Medical degree obtained from China Medical University, Taiwan. Completed residency training at UCSF Fresno. Currently practices at Optum Care (Optum Care), located at 2603 Via Campo, Montebello, CA 90640. Dr. Chien specializes in internal medicine and primary care.. In addition to English, Dr. Chien speaks Taiwanese and Mandarin.