Nicklas B. Oldenburg, M.D.
Radiation Oncology Physician · Providence, RI
Nicklas B. Oldenburg, M.D. is a radiation oncology physician with a practice address in Providence, Rhode Island, and NPI 1801899760, issued on May 24, 2005. Check the license (Rhode Island MD10931, as entered in NPPES) on the Rhode Island Board of Medical Licensure and Discipline; the Medicare figures below come from public CMS files.
- Name
- Nicklas B. Oldenburg
- Credential
- M.D.
- Primary taxonomy
- Radiation Oncology Physician 2085R0001X
- License numbers
- MD10931 RI
205005 MA
Self-reported in NPPES; status is on the state search - Practice location
- 825 N Main St, Providence, RI 02904
- Phone
- (401) 521-9700
- Enumerated
- May 24, 2005
- Record last updated
- Mar 10, 2026
- Fax
- (401) 751-1686
- Medicare enrollment
- Enrolled (PECOS I20071001000831); accepts Medicare assignment
- Medical or professional school
- University Of North Carolina At Chapel Hill School Of Medicine, 1995
- Entity
- Type 1 · individual
8 nearest radiation oncology physician records → All 29 in Rhode Island → Look up another NPI →
Also registered at 825 N Main St
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Donald Joyce, M.D.Radiation Oncology Physician1871596833
- Gabriela Masko, M.D.Radiation Oncology Physician1285637256
- Sheva Mirdamadi- Tehrani, NPFamily Nurse Practitioner1689030579
- Kathy Radie Keane, M.D.Radiation Oncology Physician1912900879
- Allen Rossetti-Chung, M.D., PH.D.Radiation Oncology Physician1669834552
- Scott Triedman, M.D.Radiation Oncology Physician1538162508
Verify Nicklas B. Oldenburg in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersRhode Island Board of Medical Licensure and Discipline
Search for license MD10931Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
72% more Medicare Part D claims than the average radiation oncology physician in 2024
230 Medicare Part D claims for 83 beneficiaries, against an average of 134 among the 4,851 providers of this specialty who prescribed in Part D.
Most prescribed
- Tamsulosin Hcl201 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): 97 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 4 group practices
- Brockton Radiation OncologyBrockton, MA
- Brown Urology, Inc.Providence, RI
- Lifespan Physician Group IncProvidence, RI
- Radiation Oncology Associates, Inc.Providence, RI
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Nicklas B. Oldenburg among 29 radiation oncology physician records in Rhode Island
Nicklas B. Oldenburg, M.D. is one of 29 radiation oncology physician records with a practice address in Rhode Island. 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 2005, is newer than 0% of them.
- NPI issued2005 · 0% of these records are older, 76% newer
- In a Medicare fileYes · 83% of these records are
- In the CMS Doctors and Clinicians fileYes · 79% of these records are
- Graduated1995 · median 2007 among the 23 with a school on file
- Record last updated2026 · 41% 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 Rhode Island 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 Rhode Island
There are 29 radiation oncology physician records in Rhode Island.
All 29 in Rhode Island → Every provider in Providence → Radiation Oncology Physician nationwide →
The 8 radiation oncology physician records with the nearest ZIP codes
- Donald Joyce, M.D.Providence, RI 029041871596833
- Gabriela Masko, M.D.Providence, RI 029041285637256
- Kathy Radie Keane, M.D.Providence, RI 029041912900879
- Allen Rossetti-Chung, M.D., PH.D.Providence, RI 029041669834552
- Scott Triedman, M.D.Providence, RI 029041538162508
- Brijal Desai, MDProvidence, RI 029031811282767
- Thomas Dipetrillo, M.DProvidence, RI 029031881651941
- Jonathan Glanzman, MDProvidence, RI 029031649533175
Common questions
What is Nicklas B. Oldenburg, M.D.'s NPI number?
Nicklas B. Oldenburg, M.D.'s National Provider Identifier (NPI) is 1801899760, issued on May 24, 2005. An NPI identifies a provider in billing; it is not a license.
Where is Nicklas B. Oldenburg, M.D. located?
The NPPES record lists a practice address at 825 N Main St, Providence, RI, 02904. Phone: (401) 521-9700. Providers update this record themselves, so call before visiting.
How can I verify Nicklas B. Oldenburg, M.D.'s license?
NPPES lists Rhode Island license number MD10931, as entered by the provider. Search the Rhode Island Board of Medical Licensure and Discipline at https://healthri.mylicense.com/Verification/. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Nicklas B. Oldenburg, M.D. prescribe under Medicare Part D?
In 2024, Nicklas B. Oldenburg, M.D. had 230 Medicare Part D claims for 83 beneficiaries; the average among radiation oncology physician prescribers was 134. Part D covers Medicare prescriptions only.
What is Nicklas B. Oldenburg, M.D.'s MIPS final score?
The 2023 MIPS final score is 97 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.