North Shore LIJ Dermatology is a branch of the North Shore Long Island Health System. It is the practice of Dr. Adam Penstein, M.D., who specializes in diagnosing and treating skin disorders in children and adults. Dr. Penstein provides a wide range of dermatological services, including treatment for dermatitis, rashes, warts and psoriasis as well as surgical procedures to remove cancers, scars, moles and keloids.