NPPES file of Aug 9, 2026

John Allen Kowalski

Infectious Disease Physician · Chicago, IL

John Allen Kowalski is an infectious disease physician with a practice address in Chicago, Illinois, and NPI 1235178708, issued on Jun 6, 2006. Check the license (Illinois 036053307, 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.

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

NPPES recordNPPES file of Aug 9, 2026
1235178708
Name
John Allen Kowalski
Primary taxonomy
Infectious Disease Physician 207RI0200X
License number
036053307 IL
Self-reported in NPPES; status is on the state search
Practice location
2020 W Harrison St, Chicago, IL 60612
Phone
(312) 572-4739
Enumerated
Jun 6, 2006
Record last updated
Apr 26, 2013 (not updated in 13 years: call before relying on the address or phone)
Fax
(312) 572-4719
Entity
Type 1 · individual
Public record from CMS NPPES (open it on the CMS NPI Registry). A record is not a license: verify it with the state board.
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8 nearest infectious disease physician records → All 464 in Illinois → Look up another NPI →

Also registered at 2020 W Harrison St

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

  1. Patricia Aguado, PHD, LCSWClinical Social Worker1760651848
  2. Sharon Allen, NPAdult Health Nurse Practitioner1659583359
  3. Jessica Arroyo Ortiz, LPCProfessional Counselor1861984940
  4. David Barker, M.D.Infectious Disease Physician1306870993
  5. Melody Bather-Gardner, MA, MISA IIAddiction (Substance Use Disorder) Counselor1215107438
  6. Ulana Bodnar, MDInfectious Disease Physician1447377551

Verify John Allen Kowalski 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 036053307    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.

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John Allen Kowalski among 464 infectious disease physician records in Illinois

John Allen Kowalski is one of 464 infectious disease physician records with a practice address in Illinois. 79% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does not. Its NPI, issued in 2006, is newer than 16% of them.

  • NPI issued2006 · 16% of these records are older, 56% newer
  • In a Medicare fileNo · 79% of these records are
  • In the CMS Doctors and Clinicians fileNo · 67% of these records are
  • Record last updated2013 · 61% of these records were not updated in five years or more

Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RI0200X and a Illinois practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).

Infectious Disease Physician providers in Illinois

There are 464 infectious disease physician records in Illinois. No Medicare prescribing, quality score, industry payment or hospital affiliation is published for this NPI.

All 464 in Illinois → Every provider in Chicago → Infectious Disease Physician nationwide →

The 8 infectious disease physician records with the nearest ZIP codes

  1. Stephanie Black, M.D.Chicago, IL 606121316908791
  2. Larry Goodman, M.DChicago, IL 606121356396550
  3. Alan Harris, M.D.Chicago, IL 606121699736488
  4. Mary Hayden, M.D.Chicago, IL 606121730140187
  5. Ronald Hershow, M.D.Chicago, IL 606121942241054
  6. Preeti Kaur, M.D.,M.P.H.Chicago, IL 606121972560639
  7. Harold Kessler, M.D.Chicago, IL 606121730140534
  8. Katayoun Rezai, M.D.Chicago, IL 606121730111576

Common questions

What is John Allen Kowalski's NPI number?

John Allen Kowalski's National Provider Identifier (NPI) is 1235178708, issued on Jun 6, 2006. An NPI identifies a provider in billing; it is not a license.

Where is John Allen Kowalski located?

The NPPES record lists a practice address at 2020 W Harrison St, Chicago, IL, 60612. Phone: (312) 572-4739. Providers update this record themselves, so call before visiting.

How can I verify John Allen Kowalski's license?

NPPES lists Illinois license number 036053307, 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.

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.