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Gregory Maggass, MD

About Dr. Maggass

Gregory Maggass, MD

Radiation Oncology

Contact Dr. Maggass: 


  • College: University of Colorado – Boulder, CO
  • Medical School:  Medical College of Wisconsin – Milwaukee, WI
  • Internship: University of California – Irvine, CA
  • Residency: University of Southern California – Los Angeles, CA
  • Board Certification: American Board of Radiology, Radiation Oncology 





Gregory A. Maggass, MD is board certified in radiation oncology, with a focus on the treatment of prostate cancer with both brachytherapy and IMRT/IGRT radiation therapy. Dr. Maggass has extensive experience with brachytherapy treatment using radioactive seeds, otherwise known as Internal Radiation Therapy. He is a pioneer in bringing Brachytherapy to patients in Arizona treating prostate, skin, eye and breast cancers.

Passionate about advancing treatments in cancer care, Dr. Maggass played an instrumental role in developing improved treatments for delivering radiation, as well as combining radiation with surgical techniques and chemotherapy.

For nearly two decades, Dr. Maggass served as the Medical Director for Arizona Oncology Services in the East Valley. In this role, he started and lead the prostate brachytherapy program at Banner Desert Medical Center and Banner Baywood. In 2012, Dr. Maggass partnered with Arizona Center for Cancer Care to expand the groups footprint into the East Valley.

Dr. Maggass received his Medical Degree from the Medical College of Wisconsin. He completed his residency at the University of Southern California Medical Center, where he received specialized training in Brachytherapy.

Dr. Maggass is a multi-year “Top Doc” honoree by Phoenix Magazine, and “Best Doctors in America” honoree by Best Doctors, Inc.

Find Me at One of The Following Locations

Arizona Center For Cancer Care Gilbert