Joann Marie Leahy, MD
Radiation Oncology Physician · Bismarck, ND
Joann Marie Leahy, MD is a radiation oncology physician with a practice address in Bismarck, North Dakota, and NPI 1972571032, issued on Mar 14, 2006. Check the license (North Dakota 10728, as entered in NPPES) on the North Dakota Board of Medicine; the Medicare figures below come from public CMS files.
- Name
- Joann Marie Leahy
- Credential
- MD
- Primary taxonomy
- Radiation Oncology Physician 2085R0001X
- License numbers
- 10728 ND
MD027824E PA
Self-reported in NPPES; status is on the state search - Practice location
- 500 N 8TH St, Bismarck, ND 58501
- Phone
- (701) 222-6102
- Enumerated
- Mar 14, 2006
- Record last updated
- Mar 26, 2008 (not updated in 18 years: call before relying on the address or phone)
- Fax
- (701) 222-6150
- Medicaid ID
- 0009113260006 PA
- Entity
- Type 1 · individual
8 nearest radiation oncology physician records → All 23 in North Dakota → Look up another NPI →
Also registered at 500 N 8TH St
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Tarek Dufan, M.D.Radiation Oncology Physician1356585293
- Cole Kreofsky, M.D.Radiation Oncology Physician1497021158
- Joon Lee, M.D.Radiation Oncology Physician1396164208
- Kathleen Nordstrom, M.D.Radiation Oncology Physician1932240025
- Robert Reynolds, M.D.Radiation Oncology Physician1285868968
- Tanner Stavn, DNP-FNPFamily Nurse Practitioner1194553156
Verify Joann Marie Leahy in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersNorth Dakota Board of Medicine
Search for license 10728Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
75% fewer Medicare Part D claims than the average radiation oncology physician in 2024
33 Medicare Part D claims, against an average of 134 among the 4,851 providers of this specialty who prescribed in Part D.
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.
Joann Marie Leahy among 23 radiation oncology physician records in North Dakota
Joann Marie Leahy, MD is one of 23 radiation oncology physician records with a practice address in North Dakota. 83% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2006, is newer than 0% of them.
- NPI issued2006 · 0% of these records are older, 61% newer
- In a Medicare fileYes · 83% of these records are
- In the CMS Doctors and Clinicians fileNo · 74% of these records are
- Record last updated2008 · 43% 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 North Dakota 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 North Dakota
There are 23 radiation oncology physician records in North Dakota.
All 23 in North Dakota → Every provider in Bismarck → Radiation Oncology Physician nationwide →
The 8 radiation oncology physician records with the nearest ZIP codes
- Tarek Dufan, M.D.Bismarck, ND 585011356585293
- Glen Hyland, M.D.Bismarck, ND 585011578679130
- Cole Kreofsky, M.D.Bismarck, ND 585011497021158
- Joon Lee, M.D.Bismarck, ND 585011396164208
- Kathleen Nordstrom, M.D.Bismarck, ND 585011932240025
- Robert Reynolds, M.D.Bismarck, ND 585011285868968
- John Watkins, M.D.Bismarck, ND 585011558450841
- Michael Grant, M.D.Minot, ND 587011003027582
Common questions
What is Joann Marie Leahy, MD's NPI number?
Joann Marie Leahy, MD's National Provider Identifier (NPI) is 1972571032, issued on Mar 14, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Joann Marie Leahy, MD located?
The NPPES record lists a practice address at 500 N 8TH St, Bismarck, ND, 58501. Phone: (701) 222-6102. Providers update this record themselves, so call before visiting.
How can I verify Joann Marie Leahy, MD's license?
NPPES lists North Dakota license number 10728, as entered by the provider. Search the North Dakota Board of Medicine at https://www.ndbom.org/. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Joann Marie Leahy, MD prescribe under Medicare Part D?
In 2024, Joann Marie Leahy, MD had 33 Medicare Part D claims; 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.