William (Billy) Kennedy, MD, is a radiation oncologist and an assistant professor in the Department of Radiation Oncology at Barrow Neurological Institute.

Dr. Kennedy’s expertise encompasses the treatment of brain and spine tumors using noninvasive radiosurgery, including Gamma Knife and CyberKnife radiosurgery, stereotactic body radiation therapy (SBRT), image-guided intensity-modulated therapy (IMRT), and brachytherapy. He is a member of the American Board of Radiology, the American Society for Radiation Oncology, and the Society for Neuro-Oncology.

Dr. Kennedy earned his medical degree from the University of Florida College of Medicine in Gainesville, where he was inducted into the Alpha Omega Alpha Honor Medical Society. He completed his internal medicine internship at Moses H. Cone Memorial Hospital in Greensboro, North Carolina, and his residency in radiation oncology at Washington University School of Medicine and Barnes-Jewish Hospital in St. Louis, where he served as chief resident in his final year.

Dr. Kennedy’s research interests include developing clinical trials for the management of primary and metastatic central nervous system tumors. He is also focused on novel uses of stereotactic radiosurgery, quality improvement of radiotherapy treatment planning and delivery, and patient-reported quality of life and survivorship. He has authored dozens of peer-reviewed publications on these topics.


  • Radiation Oncology

    Radiation oncology is the field of medicine that aims to treat cancer with radiation therapy. The doctors who treat cancer in this way have an in-depth understanding of the unique problems patients face when they undergo radiation and can, therefore, give them a more beneficial experience. They can help their patients explore a wide variety of treatment options, so they can pick the kind of radiation therapy that’s right for them and their specific conditions.

  • Monday:

    8:00AM - 4:00PM


    8:00AM - 4:00PM


    8:00AM - 4:00PM


    8:00AM - 4:00PM


    8:00AM - 4:00PM





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    The top specialties of William R. Kennedy, MD include Radiation Oncology

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    The office is located at 350 West Thomas Road in Phoenix, AZ.

    William R. Kennedy, MD accepts various types of health insurance, but individual coverage may be variable. You should check with your health insurance whether the particular doctor is in network or not.

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