Benjamin Ernst Onderdonk, M.D.
Radiation Oncology Physician · Rochester, NY
Benjamin Ernst Onderdonk, M.D. is a radiation oncology physician with a practice address in Rochester, New York, and NPI 1013370295, issued on Apr 4, 2016. Check the license (New York 309314, as entered in NPPES) on the NYS Education Department, Office of the Professions; the Medicare figures below come from public CMS files.
- Name
- Benjamin Ernst Onderdonk
- Credential
- M.D.
- Primary taxonomy
- Radiation Oncology Physician 2085R0001X
- License numbers
- 309314 NY
125.069772 IL
Self-reported in NPPES; status is on the state search - Practice location
- 1425 Portland Ave, Rochester, NY 14621
- Phone
- (585) 922-4031
- Enumerated
- Apr 4, 2016
- Record last updated
- Jul 2, 2021 (not updated in 5 years: call before relying on the address or phone)
- Fax
- (585) 922-2971
- Medicare enrollment
- Enrolled (PECOS I20210709002810); accepts Medicare assignment
- Medical or professional school
- State University Of Ny Upstate Medical University, 2016
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest radiation oncology physician records → All 449 in New York → Look up another NPI →
Also registered at 1425 Portland Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Azza Abdalla, MDStudent in an Organized Health Care Education/Training Program1043053077
- Salman Abdul Basit, M.D.Hospitalist Physician1346987104
- Abdullah Abdullah, MDCardiovascular Disease Physician1073965042
- Mouhamed Yazan Abou-Ismail, M.D.Hematology & Oncology Physician1336553676
Verify Benjamin Ernst Onderdonk in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersNYS Education Department, Office of the Professions
Search for license 309314Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
96% more Medicare Part D claims than the average radiation oncology physician in 2024
263 Medicare Part D claims for 124 beneficiaries, against an average of 134 among the 4,851 providers of this specialty who prescribed in Part D. Brand-name drugs were 10% of claims. 20 claims were for opioids.
Most prescribed
- Mometasone Furoate71 claims
- Tamsulosin Hcl40 claims
- Lidocaine Hcl Viscous33 claims
- Ssd20 claims
- Oxycodone Hcl19 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 MIPS final score for 2023 (Medicare payment program): 95.2 of 100
The Merit-based Incentive Payment System score is reported for this clinician. 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; category weights for 2023 (qpp.cms.gov).
Industry payments in 2024: $165.66
2 payments; by number, the most common kind was food and beverage; the largest payer was Siemens Medical Solutions USA, Inc. The 3,275 providers of this specialty with any payment received $1,897.85 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
2 hospitals and group practices
- Rochester General HospitalRochester, NY · Acute Care Hospitals2 of 5 stars
- Clifton Springs Sanitarium COClifton Springs, NY
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through); hospitals matched to CMS Hospital General Information (Care Compare) (data.cms.gov). Star ratings are CMS hospital ratings, not ratings of this provider.
Benjamin Ernst Onderdonk among 449 radiation oncology physician records in New York
Benjamin Ernst Onderdonk, M.D. is one of 449 radiation oncology physician records with a practice address in New York. 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 2016, is newer than 79% of them.
- NPI issued2016 · 79% of these records are older, 19% newer
- In a Medicare fileYes · 83% of these records are
- In the CMS Doctors and Clinicians fileYes · 74% of these records are
- Graduated2016 · median 2005 among the 331 with a school on file
- Record last updated2021 · 59% 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 New York 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 New York
There are 449 radiation oncology physician records in New York.
All 449 in New York → Every provider in Rochester → Radiation Oncology Physician nationwide →
The 8 radiation oncology physician records with the nearest ZIP codes
- Sheema Chawla, MDRochester, NY 146211932119716
- Jeffrey Haynes, MDRochester, NY 146211013073873
- Joshua Jones, MDRochester, NY 146211790987121
- Adam Richman, MDRochester, NY 146211417485293
- Khusraw SabitRochester, NY 146211477075166
- Benjamin Silver, MDRochester, NY 146211891292553
- Shilpa Vyas, MDRochester, NY 146211891082442
- Jan Dombrowski, MDRochester, NY 146231275587859
Common questions
What is Benjamin Ernst Onderdonk, M.D.'s NPI number?
Benjamin Ernst Onderdonk, M.D.'s National Provider Identifier (NPI) is 1013370295, issued on Apr 4, 2016. An NPI identifies a provider in billing; it is not a license.
Where is Benjamin Ernst Onderdonk, M.D. located?
The NPPES record lists a practice address at 1425 Portland Ave, Rochester, NY, 14621. Phone: (585) 922-4031. Providers update this record themselves, so call before visiting.
How can I verify Benjamin Ernst Onderdonk, M.D.'s license?
NPPES lists New York license number 309314, as entered by the provider. Search the NYS Education Department, Office of the Professions at https://www.op.nysed.gov/services/verifications/online-verification-searches. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Benjamin Ernst Onderdonk, M.D. prescribe under Medicare Part D?
In 2024, Benjamin Ernst Onderdonk, M.D. had 263 Medicare Part D claims for 124 beneficiaries; the average among radiation oncology physician prescribers was 134. Part D covers Medicare prescriptions only.
What is Benjamin Ernst Onderdonk, M.D.'s MIPS final score?
The 2023 MIPS final score is 95.2 of 100. 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.