NPPES file of Aug 9, 2026

Claire Justin

Hospitalist Physician · Chicago, IL

Claire Justin is a hospitalist physician with a practice address in Chicago, Illinois, and NPI 1154065407, issued on Apr 22, 2022. Check the license (Illinois 036.179308, 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
1154065407
Name
Claire Justin
Primary taxonomy
Hospitalist Physician 208M00000X
License numbers
036.179308 IL
A190823 CA
Self-reported in NPPES; status is on the state search
Practice location
225 E Chicago Ave, Chicago, IL 60611
Phone
(312) 227-4000
Enumerated
Apr 22, 2022
Record last updated
Jul 15, 2026
Medicare enrollment
Enrolled (PECOS I20250904004234); may accept Medicare assignment
Medical or professional school
University Of Southern California Keck School Of Medicine, 2022
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.
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8 nearest hospitalist physician records → All 1,535 in Illinois → Look up another NPI →

Also registered at 225 E Chicago Ave

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

  1. Jasmene Abernathy, MDStudent in an Organized Health Care Education/Training Program1881454957
  2. Tamkeen Abreu, PHARMD, BCPSPharmacist Clinician (PhC)/ Clinical Pharmacy Specialist1366888653
  3. Matthew Abts, MDPediatric Pulmonology Physician1588989750
  4. Samuel AccordinoStudent in an Organized Health Care Education/Training Program1194525204
  5. Carly Adajian, DDSDentist1184373029
  6. Julie Adams, RDRegistered Dietitian1417569153

Verify Claire Justin 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 036.179308    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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Claire Justin among 1,535 hospitalist physician records in Illinois

Claire Justin is one of 1,535 hospitalist physician records with a practice address in Illinois. 92% 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 2022, is newer than 93% of them.

  • NPI issued2022 · 93% of these records are older, 2% newer
  • In a Medicare fileNo · 92% of these records are
  • In the CMS Doctors and Clinicians fileYes · 87% of these records are
  • Graduated2022 · median 2013 among the 1,339 with a school on file
  • Record last updated2026 · 32% of these records were not updated in five years or more

Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 208M00000X and a Illinois practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).

Hospitalist Physician providers in Illinois

There are 1,535 hospitalist physician records in Illinois. No Medicare prescribing, quality score, industry payment or hospital affiliation is published for this NPI.

All 1,535 in Illinois → Every provider in Chicago → Hospitalist Physician nationwide →

The 8 hospitalist physician records with the nearest ZIP codes

  1. Abby Agulnek, DOChicago, IL 606111689662942
  2. Jeffrey Barsuk, MDChicago, IL 606111528031333
  3. Anjali Desai, M.D.Chicago, IL 606111730126004
  4. Vinnette Forde, MDChicago, IL 606111033174164
  5. Peter Kallas, M.D.Chicago, IL 606111760425797
  6. Michael Kornfeld, MDChicago, IL 606111538198833
  7. Nita Kulkarni, MDChicago, IL 606111790717460
  8. Matthew Landler, MDChicago, IL 606111740212398

Common questions

What is Claire Justin's NPI number?

Claire Justin's National Provider Identifier (NPI) is 1154065407, issued on Apr 22, 2022. An NPI identifies a provider in billing; it is not a license.

Where is Claire Justin located?

The NPPES record lists a practice address at 225 E Chicago Ave, Chicago, IL, 60611. Phone: (312) 227-4000. Providers update this record themselves, so call before visiting.

How can I verify Claire Justin's license?

NPPES lists Illinois license number 036.179308, 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.