Find a radiation oncologist near you
Radiation oncologists treat cancer with radiation therapy and plan treatment together with medical and surgical oncologists.
Radiation oncologists5,408Medicare-enrolled nationwide
States50with at least one radiation oncologist
Most inCA1,039 in California
Per 100,000 people1.6U.S. average
Radiation oncologists by state
Darker states have more radiation oncologists for their population. Select a state to see its cities.
Radiation oncologists per 100,000 residents
Cities with the most radiation oncologists
Every state
Questions about radiation oncologists
What does a radiation oncologist do?
Radiation oncologists treat cancer with radiation therapy and plan treatment together with medical and surgical oncologists.
How many radiation oncologists are there in the U.S.?
5,408 radiation oncologists are enrolled in Medicare according to CMS (data imported October 2026), about 1.6 for every 100,000 people. California has the most, with 1,039.
How do I find a radiation oncologist near me?
Choose your state, then your city, to see every Medicare-enrolled radiation oncologist practicing there with their address, phone number and hospital affiliations. If you have insurance other than Original Medicare, check the doctor is in your plan's network before booking.
Related specialties
Counts are distinct clinicians whose primary Medicare specialty is radiation oncology; a clinician practicing in several cities appears in each city. Source: CMS Doctors and Clinicians national file, imported October 2026; population from the U.S. Census Bureau. About the data.