Radiation Oncologists in Illinois
Data updated monthly · Last refresh October 2026
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.
278providers
68telehealth
Chicagotop city
Radiation Oncology by city in Illinois
Choose a city to see providers there.
Radiation Oncology providers in Illinois
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.
Dr. Diana Chung, M.D.Chicago, IL · No drug or device payments recorded (2025) ·
(773) 792-5133 Dr. Dian Wang, MDChicago, IL · $353 in drug and device payments (2025) · Telehealth ·
(312) 942-5751 Dr. Donthamsetti Seshagirirao, MDChicago, IL · No drug or device payments recorded (2025) ·
(312) 864-3838 Dr. Eric Donnelly, M.D.Chicago, IL · No drug or device payments recorded (2025) · Telehealth ·
(312) 926-4247 Dr. Ethan Overfelt, MDChicago, IL · No drug or device payments recorded (2025) ·
(312) 926-2000 Dr. Farris Jaamour, MD, MPHChicago, IL · No drug or device payments recorded (2025) ·
(773) 702-0817 Dr. Gary Schreiber, M.D.Chicago, IL · No drug or device payments recorded (2025) ·
(773) 989-1613 Dr. Gaurav Marwaha, M.D.Chicago, IL · $86 in drug and device payments (2025) · Telehealth ·
(312) 942-5751 Dr. Guhan Arumugam Shanmugasundaram, M.B.B.S.Chicago, IL · No drug or device payments recorded (2025) ·
(312) 355-0104 Dr. Howard HalpernChicago, IL · No drug or device payments recorded (2025) ·
(888) 824-0200 Dr. Jagdish Thakrar, M.D.Chicago, IL · No drug or device payments recorded (2025) ·
(312) 864-3837 Dr. Jeffrey GrossChicago, IL · No drug or device payments recorded (2025) ·
(248) 761-6628 Dr. John Kalapurakal, M.D.Chicago, IL · No drug or device payments recorded (2025) · Telehealth ·
(312) 926-2520 Dr. John KimballChicago, IL · No drug or device payments recorded (2025) · Telehealth ·
(773) 702-0817 Dr. Jonathan Strauss, M.D.Chicago, IL · No drug or device payments recorded (2025) ·
(312) 926-2520 Dr. Joshua Lorenz, MDChicago, IL · $146 in drug and device payments (2025) · Telehealth ·
(312) 996-3631 Dr. Ken Tatebe, MDChicago, IL · $15,969 in drug and device payments (2025) · Telehealth ·
(312) 942-5751 Dr. Kevin King, M.D.Chicago, IL · $380 in drug and device payments (2025) · Telehealth ·
(800) 322-9183 Dr. Laila Gharzai, M.D.Chicago, IL · No drug or device payments recorded (2025) · Telehealth ·
(312) 926-5434 Dr. Linda ChenChicago, IL · No drug or device payments recorded (2025) · Telehealth ·
(888) 824-0200 Dr. Lucas Serra, MDChicago, IL · $175 in drug and device payments (2025) ·
(773) 702-0817 Dr. Mark Korpics, MDChicago, IL · No drug or device payments recorded (2025) · Telehealth ·
(312) 996-3631 Dr. Maryanne Marymont, M.D.Chicago, IL · No drug or device payments recorded (2025) ·
(312) 926-2520 Dr. Matthew Koshy, MDChicago, IL · $202 in drug and device payments (2025) · Telehealth ·
(773) 702-0817 Dr. Michael Gutman, MDChicago, IL · No drug or device payments recorded (2025) ·
(773) 795-0528 Dr. Michael Kharouta, MDChicago, IL · $2,782 in drug and device payments (2025) · Telehealth ·
(773) 296-7076 Dr. Michael Spiotto, M.D., PH.D.Chicago, IL · No drug or device payments recorded (2025) ·
(773) 702-6860 Dr. Mira Patel, MDChicago, IL · No drug or device payments recorded (2025) ·
(773) 834-8288 Dr. Mohamed Abazeed, MD, PHDChicago, IL · $69 in drug and device payments (2025) · Telehealth ·
(312) 926-5392 Dr. Montserrat Quintana, MD Dr. Muzamil Arshad, MD/PHDChicago, IL · No drug or device payments recorded (2025) ·
(773) 795-0528 Dr. Nam Kim, MDChicago, IL · No drug or device payments recorded (2025) ·
(773) 506-0900 Dr. Nathaniel Camden, MDChicago, IL · No drug or device payments recorded (2025) · Telehealth ·
(312) 942-5751 Dr. Neil Mehta, M.D.Chicago, IL · $258 in drug and device payments (2025) · Telehealth ·
(312) 595-1444 Dr. Nikhil Joshi, M.D.Chicago, IL · No drug or device payments recorded (2025) ·
(312) 942-5751 Dr. Omar Azem, MDChicago, IL · $269 in drug and device payments (2025) ·
(312) 942-5751 Dr. Paul Schabinger, M.D.Chicago, IL · No drug or device payments recorded (2025) ·
(773) 792-5133 Dr. Philip Blumenfeld, M.D.Chicago, IL · No drug or device payments recorded (2025) ·
(773) 899-0473 Dr. Philip ConnellChicago, IL · No drug or device payments recorded (2025) · Telehealth ·
(888) 824-0200 Dr. Preston Thomas, MDChicago, IL · No drug or device payments recorded (2025) ·
(312) 227-4000 Dr. Ralph Weichselbaum, M.D.Chicago, IL · No drug or device payments recorded (2025) ·
(773) 702-0817 Dr. Renuka MalikChicago, IL · $18 in drug and device payments (2025) · Telehealth ·
(888) 824-0200 Dr. Rohan Katipally, MDChicago, IL · No drug or device payments recorded (2025) · Telehealth ·
(773) 702-0817 Dr. Ross Abrams, M.D.Chicago, IL · No drug or device payments recorded (2025) ·
(312) 942-0712 Dr. Ross ZeitlinChicago, IL · No drug or device payments recorded (2025) ·
(312) 864-3838 Dr. Ruchika Gutt, M.D.Chicago, IL · No drug or device payments recorded (2025) ·
(773) 702-6870 Dr. Ryan Rhome, MD, PHDChicago, IL · $155 in drug and device payments (2025) ·
(843) 412-9919 Dr. Sean Pitroda, M.D.Chicago, IL · No drug or device payments recorded (2025) · Telehealth ·
(773) 702-6870 Common questions
How many Radiation Oncology providers are in Illinois?There are 278 Radiation Oncology providers with active NPI records practicing in Illinois, according to federal NPPES data refreshed monthly.
Do Radiation Oncology providers in Illinois offer telehealth?Yes. 68 of the 278 Radiation Oncology providers in Illinois (about 24%) report offering telehealth services in CMS data.
Which cities in Illinois have the most Radiation Oncology providers?Chicago (87), Maywood (17), Springfield (13) have the highest concentration of Radiation Oncology providers in Illinois.
How many Radiation Oncology providers in Illinois received drug or device company payments?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.
Where does this data come from?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.
Do most Radiation Oncologists in Illinois work in independent practices or large health systems?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.
Which hospitals do Radiation Oncologists in Illinois work at?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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