Dr. Tso is a licensed Internal Medicine in MA. Graduated in 1990. Medical degree obtained from SUNY Stony Brook Dental School. Completed residency training at Massachusetts General Hospital and fellowship training at Brigham and Womens. Currently practices at Karen T. Isselbacher M.D. (Karen T. Isselbacher M.D.), located at 140 Gould St, Needham, MA 02494. Dr. Tso specializes in internal medicine and primary care.. In addition to English, Dr. Tso speaks Mandarin and accepts new patients.