NPPES file of Aug 9, 2026

John Biren-Fetz, DO

Diagnostic Radiology Physician · Chicago, IL

John Biren-Fetz, DO is a diagnostic radiology physician with a practice address in Chicago, Illinois, and NPI 1255821120, issued on May 15, 2018. Check the license (Illinois 125.074472, as entered in NPPES) on the Illinois Department of Financial and Professional Regulation; the Medicare figures below come from public CMS files.

Record from CMS NPPES, file of Aug 9, 2026 · method · Verify with CMS →

NPPES recordNPPES file of Aug 9, 2026
1255821120
Name
John Biren-Fetz
Credential
DO
Primary taxonomy
Diagnostic Radiology Physician 2085R0202X
License numbers
125.074472 IL
20A22502 CA
R3011 AZ
Self-reported in NPPES; status is on the state search
Practice location
1740 W Taylor St # MC931, Chicago, IL 60612
Phone
(312) 996-0235
Enumerated
May 15, 2018
Record last updated
Aug 12, 2024
Medicaid ID
1255821120 AZ
Medicare enrollment
Enrolled (PECOS I20240521002182); accepts Medicare assignment
Medical or professional school
Arizona College Of Osteopathic Medicine Mid Western University, 2018
Entity
Type 1 · individual
Public record from CMS NPPES (open it on the CMS NPI Registry). Enrollment, assignment, school and telehealth: CMS Doctors and Clinicians file, Aug 2026. A record is not a license: verify it with the state board.
Download card Updates feed

8 nearest diagnostic radiology physician records → All 1,874 in Illinois → Look up another NPI →

Also registered at 1740 W Taylor St # MC931

A shared address usually means a shared clinic or building; it does not show who employs whom.

  1. Simon ParkStudent in an Organized Health Care Education/Training Program1568040269

Verify John Biren-Fetz in five checks

  1. 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
  2. 2LicenseActive license and public ordersIllinois Department of Financial and Professional Regulation
    Search for license 125.074472    Check the board
  3. 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
  4. 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
  5. 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Open the Illinois license search

PlainDoctor does not match the HHS-OIG exclusion list to individual records: most entries carry no NPI. Search the OIG exclusion list by name.

Is this page about you? You can ask us to correct, restrict or remove it: how.

Bills Medicare through 2 group practices

  1. Modesto Radiological Medical Group IncModesto, CA
  2. Turlock Imaging Services, LLCTurlock, CA

Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).

John Biren-Fetz among 1,874 diagnostic radiology physician records in Illinois

John Biren-Fetz, DO is one of 1,874 diagnostic radiology physician records with a practice address in Illinois. 71% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2018, is newer than 83% of them.

  • NPI issued2018 · 83% of these records are older, 14% newer
  • In a Medicare fileYes · 71% of these records are
  • In the CMS Doctors and Clinicians fileYes · 64% of these records are
  • Graduated2018 · median 2004 among the 1,201 with a school on file
  • Record last updated2024 · 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 2085R0202X and a Illinois practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).

Diagnostic Radiology Physician providers in Illinois

There are 1,874 diagnostic radiology physician records in Illinois.

All 1,874 in Illinois → Every provider in Chicago → Diagnostic Radiology Physician nationwide →

The 8 diagnostic radiology physician records with the nearest ZIP codes

  1. Davide Bova, MDChicago, IL 606121346227212
  2. Michael Bresler, M.D.Chicago, IL 606121629023700
  3. James Bui, M.D.Chicago, IL 606121982652335
  4. Meri Chen, M.D.Chicago, IL 606121053369124
  5. Nestor Cuasay, MDChicago, IL 606121467450882
  6. Patrick Dunne, M.D.Chicago, IL 606121720027758
  7. Paul Erickson, M.D.Chicago, IL 606121720025422
  8. John Hibbeln, M.D.Chicago, IL 606121093773962

Common questions

What is John Biren-Fetz, DO's NPI number?

John Biren-Fetz, DO's National Provider Identifier (NPI) is 1255821120, issued on May 15, 2018. An NPI identifies a provider in billing; it is not a license.

Where is John Biren-Fetz, DO located?

The NPPES record lists a practice address at 1740 W Taylor St # MC931, Chicago, IL, 60612. Phone: (312) 996-0235. Providers update this record themselves, so call before visiting.

How can I verify John Biren-Fetz, DO's license?

NPPES lists Illinois license number 125.074472, 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. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.

Written with AI tools from the named public files; every figure is computed from those files (how it is made).

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.