Radiation Oncologists in Iowa
Data updated monthly · Last refresh October 2026
67 Radiation Oncology providers practice in Iowa, including 6 (9%) offering telehealth. The largest concentration is in Iowa City. 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.
67providers
6telehealth
Iowa Citytop city
Radiation Oncology by city in Iowa
Choose a city to see providers there.
Where Radiation Oncologists in Iowa practice
From CMS Medicare enrollment records covering 39 of the 67 providers listed here (58%). Providers who do not bill Medicare are not included in these figures.
15%solo or small practice (under 10 clinicians)
3%mid-size group (10 to 99)
82%large group or health system (100+)
Largest practice groups
| Group (as registered with Medicare) | Radiation Oncologists | All clinicians in group | Main city |
| State University of Iowa | 12 | 1,886 | Iowa City |
| Central Iowa Hospital Corp.oration | 7 | 233 | Des Moines |
| Mercy Clinics Inc. | 6 | 441 | Des Moines |
| The Finley Hospital | 3 | 84 | Dubuque |
| Quint Cities Radiation Oncology LTD | 3 | 4 | Davenport |
Hospitals where they hold privileges
| Hospital | City | Ownership | CMS star rating | Radiation Oncologists affiliated |
| University of Iowa Hospital & Clinics | Iowa City | Government | 2 of 5 | 22 |
| Mercyone Des Moines Medical Center | Des Moines | Nonprofit | 1 of 5 | 10 |
| Unitypoint Health - Des Moines Iowa Methodist Medi | Des Moines | Nonprofit | 3 of 5 | 7 |
| Mercyone Clinton Medical Center | Clinton | Nonprofit | 4 of 5 | 6 |
| Pella Regional Health Center | Pella | Nonprofit | 4 of 5 | 6 |
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.
Radiation Oncology providers in Iowa
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. Gregory Yee, MDAmes, IA · No drug or device payments recorded (2025) ·
(515) 239-2411 Dr. Nicholas Olson, MDAmes, IA · No drug or device payments recorded (2025) ·
(515) 239-2411 Dr. Farida Rajput, MDBettendorf, IA · No drug or device payments recorded (2025) ·
(563) 441-1998 Dr. Geovanne Mauro, MDBettendorf, IA · No drug or device payments recorded (2025) ·
(563) 441-1998 Dr. John Longo, MDCarroll, IA · No drug or device payments recorded (2025) ·
(712) 792-8265 Dr. Candace Correa, M.D.Cedar Rapids, IA · $43 in drug and device payments (2025) · Telehealth ·
(319) 558-4876 Dr. Gary Shultz, D.O.Cedar Rapids, IA · No drug or device payments recorded (2025) ·
(563) 556-3944 Dr. Janet Merfeld, MDCedar Rapids, IA · No drug or device payments recorded (2025) ·
(319) 398-6180 Dr. Louis Keiler, M.D.Cedar Rapids, IA · No drug or device payments recorded (2025) ·
(319) 558-4876 Dr. Michael Marquardt, M.D.Cedar Rapids, IA · $25 in drug and device payments (2025) ·
(319) 398-6180 Dr. Wook Lee, MDCedar Rapids, IA · No drug or device payments recorded (2025) ·
(319) 398-6180 Dr. Sami Koro, MDClinton, IA · No drug or device payments recorded (2025) ·
(563) 244-3611 Dr. Antonio Vigliotti, MDDavenport, IA · $72 in drug and device payments (2025) ·
(563) 421-1900 Dr. Christine Sharis, MDDavenport, IA · No drug or device payments recorded (2025) ·
(563) 421-1900 Dr. Kiwhoon Lee, M.D.Davenport, IA · $23 in drug and device payments (2025) ·
(563) 421-1901 Dr. Adam Gliniewicz, M.D.Des Moines, IA · $26 in drug and device payments (2025) ·
(515) 643-8780 Dr. Arshin Sheybani, M.D.Des Moines, IA · $771 in drug and device payments (2025) ·
(515) 241-4330 Dr. Crosby RockDes Moines, IA · No drug or device payments recorded (2025) · Telehealth ·
(970) 261-9089 Dr. Emily Merfeld, MDDes Moines, IA · $21 in drug and device payments (2025) ·
(515) 643-8780 Dr. George Voynov, MDDes Moines, IA · $21 in drug and device payments (2025) ·
(515) 643-8780 Dr. John Martens, MDDes Moines, IA · $26 in drug and device payments (2025) ·
(515) 643-5168 Dr. John Triantafyllos, M.D.Des Moines, IA · $180 in drug and device payments (2025) ·
(515) 241-4330 Dr. Joseph Carmicheal, MD, PHDDes Moines, IA · No drug or device payments recorded (2025) ·
(515) 282-2200 Dr. Philip Colletier, MDDes Moines, IA · No drug or device payments recorded (2025) ·
(515) 643-5168 Dr. Richard Deming, MDDes Moines, IA · $190 in drug and device payments (2025) · Telehealth ·
(515) 643-8206 Dr. Robert Isaak, M.D., PHARM.D.Des Moines, IA · $228 in drug and device payments (2025) · Telehealth ·
(515) 241-4330 Dr. Samuel Schroeder, M.D.Des Moines, IA · $97 in drug and device payments (2025) · Telehealth ·
(515) 241-4330 Dr. Sarah Mcavoy, M.D.Des Moines, IA · $83 in drug and device payments (2025) ·
(515) 643-8780 Dr. Truston Bodine, MD, PHDDes Moines, IA · $47 in drug and device payments (2025) ·
(515) 643-8780 Dr. Edward Miles, M.D.Dubuque, IA · $165 in drug and device payments (2025) ·
(563) 584-3480 Dr. Thomas Lally, MDDubuque, IA · No drug or device payments recorded (2025) ·
(563) 556-2097 Dr. Addison Willett, MD, JD, MBAIowa City, IA · $205 in drug and device payments (2025) ·
(319) 356-2253 Dr. Albert Hass, MDIowa City, IA · No drug or device payments recorded (2025) ·
(319) 356-7609 Dr. Bryan Allen, M.D., PH.D.Iowa City, IA · $275 in drug and device payments (2025) ·
(319) 353-8836 Dr. Carryn Anderson, MDIowa City, IA · No drug or device payments recorded (2025) ·
(319) 353-8836 Dr. Ferial Tewfik, MDIowa City, IA · No drug or device payments recorded (2025) ·
(319) 354-8777 Dr. James Byrne, M.D., PH.D.Iowa City, IA · No drug or device payments recorded (2025) ·
(319) 353-8836 Dr. Jessica Parkhurst, M.D.Iowa City, IA · $61 in drug and device payments (2025) ·
(319) 353-8836 Dr. John Buatti, MDIowa City, IA · No drug or device payments recorded (2025) ·
(319) 356-2699 Dr. Kailin Yang, MD, PHDIowa City, IA · $108 in drug and device payments (2025) ·
(319) 353-8836 Dr. Kristin PlichtaIowa City, IA · No drug or device payments recorded (2025) ·
(319) 356-0581 Dr. Logan Verheyen, MDIowa City, IA · No drug or device payments recorded (2025) ·
(319) 384-6135 Dr. Malgorzata Kozak, M.D.Iowa City, IA · No drug or device payments recorded (2025) · Telehealth ·
(319) 353-8836 Dr. Mark Dion, MDIowa City, IA · No drug or device payments recorded (2025) ·
(319) 356-2699 Dr. Mark Lo Galbo, DO, MPHIowa City, IA · No drug or device payments recorded (2025) ·
(319) 384-6135 Dr. Mark Smith, MDIowa City, IA · No drug or device payments recorded (2025) ·
(319) 356-4884 Dr. Moses Evbuomwan, MDIowa City, IA · No drug or device payments recorded (2025) ·
(319) 384-6135 Dr. Samuel Andrews, M.D.Iowa City, IA · No drug or device payments recorded (2025) ·
(319) 356-2699 Common questions
How many Radiation Oncology providers are in Iowa?There are 67 Radiation Oncology providers with active NPI records practicing in Iowa, according to federal NPPES data refreshed monthly.
Do Radiation Oncology providers in Iowa offer telehealth?Yes. 6 of the 67 Radiation Oncology providers in Iowa (about 9%) report offering telehealth services in CMS data.
Which cities in Iowa have the most Radiation Oncology providers?Iowa City (21), Des Moines (14), Cedar Rapids (6) have the highest concentration of Radiation Oncology providers in Iowa.
How many Radiation Oncology providers in Iowa received drug or device company payments?26 of 67 Radiation Oncology providers in Iowa (39%) 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 Iowa work in independent practices or large health systems?Among 39 Radiation Oncologists in Iowa enrolled in Medicare, 15% bill through a solo or small practice with fewer than 10 clinicians, 3% through a mid-size group of 10 to 99, and 82% through a large group or health system with 100 or more clinicians, according to CMS enrollment records.
Which hospitals do Radiation Oncologists in Iowa work at?According to CMS facility affiliation records, the Iowa hospitals where the most Radiation Oncologists hold privileges are University of Iowa Hospital & Clinics in Iowa City; Mercyone Des Moines Medical Center in Des Moines; Unitypoint Health - Des Moines Iowa Methodist Medi in Des Moines.
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