Ellen K. Roh, M.D. Ellen K. Roh, M.D. is a board-certified dermatologist and an attending physician at Massachusetts General Hospitals Department of Dermatology. In addition, she is Assistant Professor of Dermatology, Harvard Medical School. She received her medical degree (M.D.) and her dermatology residency at the University of Pittsburgh Medical School. Professionally, she is a member of the American Academy of Dermatology. Dr. Roh has been an invited guest lecturer and is co-author of several medical publications and abstracts. As well as general dermatology, her clinical interests are bullous disorders (skin blisters, sores), nail disorders, connective tissue disease, and infectious diseases.