Board-certified by the American Board of Dermatology and fellowship-trained in cosmetic and skin cancer surgery through a UCLA-affiliated program accredited by the American Academy of Cosmetic Surgery, Dr. Mark A. Willoughby practices with Dermatology & Laser Center of San Diego at 4060 Fourth Avenue, Suite 209 in the 92103. Mohs micrographic excisions performed on the face, scalp, and lower legs are routinely reconstructed in coordination with the oral-maxillofacial team at Center for Oral & Facial Surgery, a referral pathway for defects involving the lip, nose, or periorbital regions. The practice has operated continuously since 2002 and Dr. Willoughby served as chief resident in dermatology at Cook County Hospital in Chicago before completing his cosmetic surgery fellowship. He speaks English and Spanish, which broadens his bilingual skin cancer screening panel across the 92103 corridor and the South Bay. Electronic brachytherapy is offered onsite as a non-surgical option for non-melanoma skin cancers in elderly patients, with deeper excisions coordinated through Pacific Coast Surgical Group when Mohs-only clearance is not feasible. Complex head-and-neck reconstructions following Mohs removal of recurrent basal cell and squamous cell carcinoma remain the highest-acuity procedures the Hillcrest office coordinates.