278 Radiation Oncology providers practice in Illinois, including 68 (24%) offering telehealth. The largest concentration is in Chicago. Profiles include federal Open Payments records of money received from drug and device companies in 2025. Listings are drawn from federal public records and are not endorsements.
Choose a city to see providers there.
| Radiation Oncology in Chicago | 87 providers |
| Radiation Oncology in Maywood | 17 providers |
| Radiation Oncology in Springfield | 13 providers |
| Radiation Oncology in Rockford | 9 providers |
| Radiation Oncology in Oak Lawn | 8 providers |
| Radiation Oncology in Warrenville | 8 providers |
| Radiation Oncology in Peoria | 7 providers |
| Radiation Oncology in Elgin | 6 providers |
| Radiation Oncology in Aurora | 6 providers |
| Radiation Oncology in Hinsdale | 5 providers |
| Radiation Oncology in Berwyn | 5 providers |
| Radiation Oncology in Urbana | 5 providers |
| Radiation Oncology in Joliet | 5 providers |
| Radiation Oncology in Bourbonnais | 4 providers |
| Radiation Oncology in Decatur | 4 providers |
| Radiation Oncology in Zion | 4 providers |
| Radiation Oncology in Libertyville | 4 providers |
| Radiation Oncology in Elk Grove Village | 3 providers |
| Radiation Oncology in Harvey | 3 providers |
| Radiation Oncology in Mchenry | 3 providers |
| Radiation Oncology in Evanston | 3 providers |
| Radiation Oncology in Park Ridge | 3 providers |
| Radiation Oncology in Barrington | 3 providers |
| Radiation Oncology in Geneva | 3 providers |
From CMS Medicare enrollment records covering 166 of the 278 providers listed here (60%). Providers who do not bill Medicare are not included in these figures.
| Group (as registered with Medicare) | Radiation Oncologists | All clinicians in group | Main city |
| Northwestern Medical Faculty Foundation | 25 | 4,386 | Chicago |
| University of Chicago | 19 | 1,674 | Chicago |
| Radiation Oncology Consultants, LTD | 19 | 19 | Barrington |
| Osf Multi-Specialty Group | 12 | 2,123 | Peoria |
| Rush University Medical Group | 10 | 1,521 | Chicago |
| Hospital | City | Ownership | CMS star rating | Radiation Oncologists affiliated |
| Northwestern Medicine Central Dupage Hospital | Winfield | Nonprofit | 5 of 5 | 24 |
| The University of Chicago Medical Center | Chicago | Nonprofit | 4 of 5 | 19 |
| Northwestern Memorial Hospital | Chicago | Nonprofit | 5 of 5 | 15 |
| Advocate Lutheran General Hospital | Park Ridge | Nonprofit | 4 of 5 | 12 |
| Advocate Illinois Masonic Medical Center | Chicago | Nonprofit | 3 of 5 | 11 |
Sources: CMS Doctors and Clinicians (August 2026) and Facility Affiliation files (August 2026); hospital ownership type and overall star rating from CMS Hospital General Information (July 2026). A clinician in several groups is counted once, in the largest group they bill through. Ownership type is what the hospital reports to CMS; it does not show private equity or other investor ownership. How we build this directory.
Listed by city, largest first. Payment figures come from the federal Open Payments program, which requires drug and device companies to report what they pay physicians for consulting, speaking, meals, travel and royalties. A disclosed payment is a financial relationship, not evidence of wrongdoing, and many totals reflect a single meal. Figures cover calendar year 2025.
There are 278 Radiation Oncology providers with active NPI records practicing in Illinois, according to federal NPPES data refreshed monthly.
Yes. 68 of the 278 Radiation Oncology providers in Illinois (about 24%) report offering telehealth services in CMS data.
Chicago (87), Maywood (17), Springfield (13) have the highest concentration of Radiation Oncology providers in Illinois.
123 of 278 Radiation Oncology providers in Illinois (44%) received at least one payment from a drug or device company in 2025, according to the federal Open Payments program.
Provider counts and profiles come from the federal NPPES registry and CMS Doctors and Clinicians files. Payment figures come from the CMS Open Payments program for calendar year 2025. The directory refreshes monthly.
Among 166 Radiation Oncologists in Illinois enrolled in Medicare, 7% bill through a solo or small practice with fewer than 10 clinicians, 17% through a mid-size group of 10 to 99, and 76% through a large group or health system with 100 or more clinicians, according to CMS enrollment records.
According to CMS facility affiliation records, the Illinois hospitals where the most Radiation Oncologists hold privileges are Northwestern Medicine Central Dupage Hospital in Winfield; The University of Chicago Medical Center in Chicago; Northwestern Memorial Hospital in Chicago.
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