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Nicolas Prionas


Radiation oncologist
Bay Area native with a passion for serving our communities

Dr. Nicolas Prionas is a radiation oncologist who cares for adults with all types of cancer. He has a special interest in treating breast cancer.

In research, Prionas focuses on developing new technologies to improve the early detection, diagnosis and treatment of cancer. He is also interested in exploring applications of technology to increase access to equitable cancer care.

Prionas earned a bachelor's degree in biomedical computation and a master's degree in biomechanical engineering at Stanford University. At the University of California, Davis, he earned both a doctorate in biomedical engineering and his medical degree. He completed a residency in radiation oncology at Stanford Medicine.

Prionas is a member of the American Medical Association, American Society for Radiation Oncology, Radiological Society of North America, American Brachytherapy Society and American Association of Physicists in Medicine. He speaks Greek and Spanish.

  • Education

    UC Davis, MD, 2014

  • Residencies

    Stanford Medicine, Radiation Oncology, 2019

  • Academic Title

    Assistant Professor

Where I see patients (4)

    My reviews


    Overall Experience
    48 Ratings
    About our process
    Nov 18, 2023
    He's very passionate about his job and patients.
    Oct 21, 2023
    I had an excellent experience. I felt well treated and very professionally informed about my treatment options by my doctor.
    Oct 12, 2023
    Excellent visit. Very informative and professional with genuine caring
    Oct 10, 2023
    This was the clearest explanation to date of my condition and possible next steps
    Sep 12, 2023
    Very informative helpful and friendly.
    Jan 23, 2023
    Dr Prionas is exceptional -I particularly appreciated his explanations and answers to my questions. He is an exceptional teacher and the most compassionate Dr I have met so far in my cancer treatment journey
    Nov 29, 2022
    Dr prionas is amazing compassionate excellent listener
    Sep 15, 2022
    Very special doctor
    Jul 17, 2022
    Dr. Prionas is great at involving me in discussions about my care and test results and takes all the time necessary to fully explain results and answer my questions.
    Apr 30, 2022
    Dr Prionas is a rare physician. He is so informed friendly and reassuring. Explains options well very open to questions and is very empathetic. Gives time for my concerns. He is exceptional. I wish all doctors were like him. He is definitely an asset to UCSF.