Mark Willoughby is a native San Diegan, graduated from the University of California, Los Angeles and received his medical degree from Ohio State University, School of Medicine.

He trained in dermatology at Cook County Hospital in Chicago, where he was chief resident. Dr. Willoughby then completed a cosmetic surgery fellowship affiliated with the University of California, Los Angeles and accredited by the American College of Cosmetic Surgery. He is a member of the American Academy of Dermatology, the American College of Cosmetic Surgery, and a Board member of the Society of Cosmetic Surgeons.

Dr. Willoughby is a board certified dermatologist specializing in dermatologic, cosmetic, and laser surgery. He maintains an active and busy schedule in both the dermatologic and local community participating in national meetings, academic preceptorships, and community skin cancer screens sponsored by the American Academy of Dermatology.