About Dr. Zanelli

Dr. Zanelli is a Dermatologist & Dermatologic Surgeon certified by the American Board of Dermatology. He specializes in Aesthetic, Medical, & Surgical Dermatology and has been named one of “America’s Top Dermatologists” by the 2009 and 2011 Guide to America’s Top Dermatologists written by the Consumers Research Council of America. Gaetano (Guy) Zanelli received his Doctor of Medicine degree with highest honors from the University of Pennsylvania School of Medicine in Philadelphia, and has been in Dermatology practice in the San Francisco Bay Area since 1995. He served as chief resident in dermatology at Thomas Jefferson University in Philadelphia, and completed his internship in Internal Medicine and fellowship in Melanoma at the University of California, San Francisco.

Dr. Zanelli holds a teaching appointment as Assistant Clinical Professor of Dermatology at the University of California, San Francisco, where his activities include teaching diagnosis and treatment of skin disease to residents and medical students. He recently served as the Bay Area California State Chariman for the Dermatology Foundation Leaders’ Society.

Before finishing medical school Dr. Zanelli returned to San Francisco to do clinical research at the University of California’s Department of Dermatology at San Francisco General Hospital. During that time he organized and participated in the first trials of laser treatment for Kaposi’s Sarcoma, and this work was subsequently published in the Journal of the American Academy of Dermatology. Dr. Zanelli has presented clinical research work at meetings of the American Academy of Dermatology and the American Society for Dermatologic Surgery and has authored a book chapter on the dermatologic manifestations of mycobacterial infections.


In addition to his medical work, before medical school Dr. Zanelli received both his Bachelors and Masters degrees in music, specifically piano performance, and studied with some of the great master teachers. His recital work as a concert pianist has taken him from Carnegie Hall to the opening ceremonies of the XXIIIrd Olympics at Los Angeles. Many of his summers before medical school were spent studying and participating at the Aspen Music Festival. He specializes in the music of the German and late Romantic composers, such as Beethoven, Chopin, and Rachmaninoff and is also an avid chamber musician.

Dr. Zanelli’s photographic images of Italy, the so-called Bell’Italia Series, have won wide acclaim.


Dr. Zanelli's Medical Education

Medical School:
University of Pennsylvania School of Medicine
1986-1990 (graduation with highest Honors)

Internal Medicine Internship:
University of California, San Francisco
1990-1991

Dermatology Residency (appointed Chief Resident)
Thomas Jefferson University
1992-1995

Melanoma Fellowship:
University of California, San Francisco
1991-1992

Board Certification:
American Board of Dermatology
1995; re-certification: 2006 & 2015