Eileen Deignan, MD, is a board-certified dermatologist, a partner at Dermatology Associates of Concord, and has been a member of the Emerson Medical Staff since 1999. She is the chief of dermatology and the associated chair of the credentials committee. Dr. Deignan holds leadership positions in the Massachusetts Academy of Dermatology, the New England Dermatological Society, and the American Academy of Dermatology. She also serves on the Emerson Hospital quality committee.