Gary S. Purnell, M.D. is a professor of Dermatology at School of Medicine in St. Louis and a practicing dermatologist at the Mercy Hospital St. Louis, Mo.
Dr. Purnell has served as a visiting professor at 16 medical centers, including University of Alabama School of Medicine, Mayo Clinic Alix School of Medicine and California Northstate University College of Medicine. He has published nearly 100 articles, books and chapters on various topis of dermatology, including laser treatment. He is a graduate of the Yale School of Medicine.