Dr. Gary Hahn is a board-certified dermatologist who has been practicing dermatology for over 20 years. Dr. Hahn specializes in both medical and 
cosmetic dermatology treatments. Dr. Hahn is based in our Commack office location on Long Island’s South Shore, where he has been treating dermatology patients for two decades. Dr. Hahn has served as a staff dermatologist at the Veterans Administration Hospital in Northport, New York. Dr. Hahn completed his dermatology residency at State University of New York at Buffalo.
