Jonathan B. Ashman, MD
Radiation Oncology Physician · Scottsdale, AZ
Jonathan B. Ashman, MD is a radiation oncology physician with a practice address in Scottsdale, Arizona, and NPI 1659337566, issued on Apr 21, 2006. Check the license (Arizona 34491, as entered in NPPES) on the Arizona Medical Board; the Medicare figures below come from public CMS files.
- Name
- Jonathan B. Ashman
- Credential
- MD
- Primary taxonomy
- Radiation Oncology Physician 2085R0001X
- License number
- 34491 AZ
Self-reported in NPPES; status is on the state search - Practice location
- 13400 E Shea Blvd, Scottsdale, AZ 85259
- Phone
- (480) 301-8000
- Enumerated
- Apr 21, 2006
- Record last updated
- Nov 18, 2025
- Medicare enrollment
- Enrolled (PECOS I20060616000011); accepts Medicare assignment
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest radiation oncology physician records → All 156 in Arizona → Look up another NPI →
Also registered at 13400 E Shea Blvd
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Jonathan B. Ashman in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersArizona Medical Board
Search for license 34491Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
84% fewer Medicare Part D claims than the average radiation oncology physician in 2024
22 Medicare Part D claims for 18 beneficiaries, against an average of 134 among the 4,851 providers of this specialty who prescribed in Part D. Brand-name drugs were 0% of 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.
The practice group's MIPS final score for 2023 (Medicare payment program): 78.6 of 100
The Merit-based Incentive Payment System score is reported for the practice group, not for one clinician alone. Four categories are weighted into the final score; the average among 454,083 clinicians with a measured score was 83.5.
Source: CMS Quality Payment Program, MIPS performance year 2023, group reporting; category weights for 2023 (qpp.cms.gov).
Bills Medicare through one group practice
- Mayo Clinic ArizonaScottsdale, AZ
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Jonathan B. Ashman among 156 radiation oncology physician records in Arizona
Jonathan B. Ashman, MD is one of 156 radiation oncology physician records with a practice address in Arizona. 84% 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 15% of them.
- NPI issued2006 · 15% of these records are older, 51% newer
- In a Medicare fileYes · 84% of these records are
- In the CMS Doctors and Clinicians fileYes · 74% of these records are
- Graduated2001 · median 2003 among the 115 with a school on file
- Record last updated2025 · 46% 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 Arizona 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 Arizona
There are 156 radiation oncology physician records in Arizona.
All 156 in Arizona → Every provider in Scottsdale → Radiation Oncology Physician nationwide →
The 8 radiation oncology physician records with the nearest ZIP codes
- Safia Ahmed, MDScottsdale, AZ 852591548609910
- Sarah James, M.D.Scottsdale, AZ 852591376809814
- Sameer Keole, MDScottsdale, AZ 852591235194952
- Brady Laughlin, MDScottsdale, AZ 852591326509274
- Lisa McGee, MDScottsdale, AZ 852591770747420
- Jean-Claude Rwigema, MDScottsdale, AZ 852591396039426
- Steven Schild, M.D.Scottsdale, AZ 852591396728820
- Terence Sio, M.D.Scottsdale, AZ 852591811200736
Common questions
What is Jonathan B. Ashman, MD's NPI number?
Jonathan B. Ashman, MD's National Provider Identifier (NPI) is 1659337566, issued on Apr 21, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Jonathan B. Ashman, MD located?
The NPPES record lists a practice address at 13400 E Shea Blvd, Scottsdale, AZ, 85259. Phone: (480) 301-8000. Providers update this record themselves, so call before visiting.
How can I verify Jonathan B. Ashman, MD's license?
NPPES lists Arizona license number 34491, as entered by the provider. Search the Arizona Medical Board at https://www.azmd.gov/. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Jonathan B. Ashman, MD prescribe under Medicare Part D?
In 2024, Jonathan B. Ashman, MD had 22 Medicare Part D claims for 18 beneficiaries; the average among radiation oncology physician prescribers was 134. Part D covers Medicare prescriptions only.
What is Jonathan B. Ashman, MD's MIPS final score?
The 2023 MIPS final score is 78.6 of 100, reported for the practice group. The average among 454,083 clinicians with a measured score was 83.5.
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.