Mark Willoughby, MD operates the Dermatology & Laser Center of San Diego from Suite 205 at 6386 Alvarado Court in Grantville, San Diego, CA 92120. A native San Diegan, Willoughby graduated from UCLA, earned his medical degree from Ohio State University School of Medicine, and completed his dermatology residency at Cook County Hospital in Chicago, where he served as chief resident. He then finished a cosmetic and skin cancer surgery fellowship affiliated with UCLA and accredited by the American College of Cosmetic Surgery, and holds California medical license A69750. Board certified by the American Board of Dermatology, he maintains membership in the American Academy of Dermatology and the Society of Cosmetic Surgeons. Acute dermatologic referrals that begin as undifferentiated rashes or suspicious lesions at walk-in settings often route to a board-certified dermatologist for definitive biopsy, and Perlman Clinic La Mesa is one Grantville-area urgent care that feeds into that referral pathway. The office covers medical, cosmetic, and laser dermatology: Mohs micrographic surgery for skin cancer excision, electronic brachytherapy for non-melanoma skin cancer, Botox and injectable filler administration, photofacials using intense pulsed light, laser tattoo removal, and acne management protocols. The Alvarado Court location sits on the Grantville medical corridor near Mission Gorge Road and the I-8 interchange, within the 92120 ZIP. Willoughby speaks Spanish and Chinese, extending language access in a subspecialty where precise description of skin changes affects diagnostic accuracy. Cosmetic dermatology patients in the same corridor sometimes coordinate treatments across aesthetic disciplines, and Spectrum Eye Clinic + MedSpa in Allied Gardens addresses the adjacent scope of ocular and aesthetic care within the 92120 network. The Grantville practice functions as one of three locations alongside offices in Hillcrest and Chula Vista, and Willoughby participates in community skin cancer screening events sponsored by the American Academy of Dermatology across San Diego.