Dr. Rossi has personally treated more than 10,000 prostate cancer patients with proton radiation over the last 26 years—more than any other physician in the world.

Internationally recognized for his achievements in cancer treatment, Dr. Rossi is a radiation oncologist with a research focus on the quality of life and cure rate in prostate cancer and lymphoma. Specializing in proton beam therapy, he has been treating prostate cancer patients with proton therapy since 1991. Prior to serving as the Medical Director of California Protons, he was the Medical Director of the Scripps Proton Therapy Center and was an Associate Professor in the Department of Radiation Medicine at the Loma Linda University Medical Center. He is currently a Clinical Professor of Radiation Medicine at UC San Diego.