Dr. Tzeng is a licensed Endocrinology in CA. Graduated in 1978. Medical degree obtained from New York Medical College. Completed residency training at VA Hospital and fellowship training at VA Hospital. Currently practices at John Muir Health (John Muir Health), located at 2485 High School Ave, Concord, CA 94520. Dr. Tzeng specializes in Diabetes, thyroid disease, hyperlipidemia, osteoporosis, obstructive sleep apnea, fatty liver. . In addition to English, Dr. Tzeng speaks Taiwanese and Mandarin.