Dr. Leong is a licensed Internal Medicine in NY. Graduated in 1983. Medical degree obtained from New York University School of Medicine. Completed residency training at NewYork-Presbyterian. Currently practices at Northwell Health (Northwell Health), located at 865 Northern Blvd, Great Neck, NY 11021. Dr. Leong specializes in internal medicine and primary care.. In addition to English, Dr. Leong speaks Cantonese.