Claire Niewiara, MD
Radiation Oncology Physician · Maywood, IL
Claire Niewiara, MD is a radiation oncology physician with a practice address in Maywood, Illinois, and NPI 1487458113, issued on Apr 2, 2025. Check the license (Illinois 125085666, as entered in NPPES) on the Illinois Department of Financial and Professional Regulation; the federal record below is the public data PlainDoctor holds for this provider.
- Name
- Claire Niewiara
- Credential
- MD
- Primary taxonomy
- Radiation Oncology Physician 2085R0001X
- License numbers
- 125085666 IL
125.085666 IL
Self-reported in NPPES; status is on the state search - Practice location
- 2160 S 1St Ave, Maywood, IL 60153
- Phone
- (708) 216-2729
- Enumerated
- Apr 2, 2025
- Record last updated
- May 20, 2026
- Entity
- Type 1 · individual
Also registered at 2160 S 1St Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Stefanie AbbottFamily Medicine Physician1861137457
- Osamah Abdallah, M.D.Internal Medicine Physician1275976144
- Abdelhai Abdelqader, MDGastroenterology Physician1073931127
- Samer Abdelsamie, D.M.DOral and Maxillofacial Surgery (Dentist)1366732257
- Zaid Abdelsattar, MD, MSCThoracic Surgery (Cardiothoracic Vascular Surgery) Physician1760793293
- Gerges Abdelsayed, MBBCH BAODiagnostic Radiology Physician1942902606
Verify Claire Niewiara in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersIllinois Department of Financial and Professional Regulation
Search for license 125085666Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Radiation Oncology Physician providers in Illinois
There are 277 radiation oncology physician records in Illinois. No Medicare prescribing, quality score, industry payment or hospital affiliation is published for this NPI.
Other radiation oncology physician records in Illinois
- Mohamed Abazeed, MD, PHDChicago, IL1205096609
- Christopher Abraham, MDSpringfield, IL1083900294
- Ross Abrams, M.D.Chicago, IL1356317564
- Iftekhar Ahmad, M.D.Rockford, IL1164641791
- Elke Aippersbach, M.D.,M.SC.,Oak Lawn, IL1285754895
- Adil Akthar, M.D.Warrenville, IL1598175531
- Neal Andruska, MD, PHDWarrenville, IL1972035798
- Sobiya Ansari, M.D.Chicago, IL1336554666
- Muzamil Arshad, MD/PHDChicago, IL1518429570
- Guhan Arumugam Shanmugasundaram, M.B.B.S.Chicago, IL1023800943
Common questions
What is Claire Niewiara, MD's NPI number?
Claire Niewiara, MD's National Provider Identifier (NPI) is 1487458113, issued on Apr 2, 2025. An NPI identifies a provider in billing; it is not a license.
Where is Claire Niewiara, MD located?
The NPPES record lists a practice address at 2160 S 1St Ave, Maywood, IL, 60153. Phone: (708) 216-2729. Providers update this record themselves, so call before visiting.
How can I verify Claire Niewiara, MD's license?
NPPES lists Illinois license number 125085666, as entered by the provider. Search the Illinois Department of Financial and Professional Regulation at https://idfpr.illinois.gov/checklicense.html. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. 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.