Dr. Ko is a licensed Internal Medicine in CA. Graduated in 1995. Medical degree obtained from Harvard Medical School. Completed residency training at Cedars Sinai Med Center. Currently practices at Brown & Toland Physicians (Brown & Toland Physicians), located at 818 Jackson St, San Francisco, CA 94133. Dr. Ko specializes in internal medicine, primary care.. In addition to English, Dr. Ko speaks Mandarin, Cantonese, and Shanghainese and accepts new patients.