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

Clinics I work with

Breast Care Center

Bakar Precision Cancer Medicine Building

1825 Fourth St., Third Floor
San Francisco, CA 94158

Radiation Oncology Clinic

See all three of our San Francisco locations.

UCSF – Washington Cancer Center

Genetic Counseling

2500 Mowry Ave., Suite 227
Fremont, CA 94538

My reviews


Overall Experience
42 Reviews
Explained things in a way that was easy to understand
42 Reviews
Did the doctor pay attention to your concerns
42 Reviews
Gave easy to understand instructions about taking care of health problems or concerns
41 Reviews
Knew the important information about your medical history
42 Reviews
The provider showed respect for what you had to say
42 Reviews
The provider spent enough time with me
42 Reviews