James Donald Byrne, M.D., PH.D.
Radiation Oncology Physician · Iowa City, IA
James Donald Byrne, M.D., PH.D. is a radiation oncology physician with a practice address in Iowa City, Iowa, and NPI 1386091148, issued on May 20, 2016. Check the license (Iowa MD-48641, as entered in NPPES) on the Iowa Board of Medicine; the Medicare figures below come from public CMS files.
- Name
- James Donald Byrne
- Credential
- M.D., PH.D.
- Primary taxonomy
- Radiation Oncology Physician 2085R0001X
- License numbers
- MD-48641 IA
218309 NC
Self-reported in NPPES; status is on the state search - Practice location
- 200 Hawkins Dr, Iowa City, IA 52242
- Phone
- (319) 353-8836
- Enumerated
- May 20, 2016
- Record last updated
- Aug 5, 2021 (not updated in 5 years: call before relying on the address or phone)
- Fax
- (319) 356-1530
- Medicare enrollment
- Enrolled (PECOS I20210714001331); accepts Medicare assignment
- Medical or professional school
- University Of North Carolina At Chapel Hill School Of Medicine, 2016
- Entity
- Type 1 · individual
8 nearest radiation oncology physician records → All 67 in Iowa → Look up another NPI →
Also registered at 200 Hawkins Dr
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Francois Abboud, MDCardiovascular Disease Physician1598753113
- Abdalla Abdalla, MBBCHAnatomic Pathology & Clinical Pathology Physician1518859826
- Sameh AbdallaAnatomic Pathology & Clinical Pathology Physician1437902160
Verify James Donald Byrne in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersIowa Board of Medicine
Search for license MD-48641Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
60% fewer Medicare Part D claims than the average radiation oncology physician in 2024
54 Medicare Part D claims for 22 beneficiaries, against an average of 134 among the 4,851 providers of this specialty who prescribed in Part D.
Most prescribed
- Tamsulosin Hcl43 claims
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
Bills Medicare through one group practice
- State University OF IowaIowa City, IA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
James Donald Byrne among 67 radiation oncology physician records in Iowa
James Donald Byrne, M.D., PH.D. is one of 67 radiation oncology physician records with a practice address in Iowa. 73% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2016, is newer than 73% of them.
- NPI issued2016 · 73% of these records are older, 24% newer
- In a Medicare fileYes · 73% of these records are
- In the CMS Doctors and Clinicians fileYes · 67% of these records are
- Graduated2016 · median 2010 among the 45 with a school on file
- Record last updated2021 · 60% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 2085R0001X and a Iowa practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Radiation Oncology Physician providers in Iowa
There are 67 radiation oncology physician records in Iowa.
All 67 in Iowa → Every provider in Iowa City → Radiation Oncology Physician nationwide →
The 8 radiation oncology physician records with the nearest ZIP codes
- Bryan Allen, M.D., PH.D.Iowa City, IA 522421689832081
- Carryn Anderson, MDIowa City, IA 522421891987392
- Samuel Andrews, M.D.Iowa City, IA 522421851508337
- John Buatti, MDIowa City, IA 522421205829058
- Mark Dion, MDIowa City, IA 522421447252010
- Albert Hass, MDIowa City, IA 522421235121062
- Malgorzata Kozak, M.D.Iowa City, IA 522421083091235
- Jessica Parkhurst, M.D.Iowa City, IA 522421699188664
Common questions
What is James Donald Byrne, M.D., PH.D.'s NPI number?
James Donald Byrne, M.D., PH.D.'s National Provider Identifier (NPI) is 1386091148, issued on May 20, 2016. An NPI identifies a provider in billing; it is not a license.
Where is James Donald Byrne, M.D., PH.D. located?
The NPPES record lists a practice address at 200 Hawkins Dr, Iowa City, IA, 52242. Phone: (319) 353-8836. Providers update this record themselves, so call before visiting.
How can I verify James Donald Byrne, M.D., PH.D.'s license?
NPPES lists Iowa license number MD-48641, as entered by the provider. Search the Iowa Board of Medicine at https://dial.iowa.gov/about-dial/boards-and-commissions/medicine. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does James Donald Byrne, M.D., PH.D. prescribe under Medicare Part D?
In 2024, James Donald Byrne, M.D., PH.D. had 54 Medicare Part D claims for 22 beneficiaries; the average among radiation oncology physician prescribers was 134. Part D covers Medicare prescriptions only.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.