NPPES file of Aug 9, 2026

Mark Brimmeier, PA-C

Physician Assistant · Chicago, IL

Mark Brimmeier, PA-C is a physician assistant with a practice address in Chicago, Illinois, and NPI 1083441455, issued on Sep 18, 2024. Check the license (Illinois 085-011947, as entered in NPPES) with the Illinois board that licenses this profession; 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
1083441455
Name
Mark Brimmeier
Credential
PA-C
Primary taxonomy
Physician Assistant 363A00000X
License number
085-011947 IL
Self-reported in NPPES; status is on the state search
Practice location
1620 W Harrison St, Chicago, IL 60612
Phone
(312) 942-4200
Enumerated
Sep 18, 2024
Record last updated
May 1, 2026
Medicare enrollment
Enrolled (PECOS I20241209002693); accepts Medicare assignment
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 physician assistant records → All 4,926 in Illinois → Look up another NPI →

Also registered at 1620 W Harrison St

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

  1. Kylie Abernathy, OTOccupational Therapist1518489269
  2. Iris Abrahantes Morales, MDObstetrics & Gynecology Physician1164155164
  3. Sunaina Addanki, MDInternal Medicine Physician1396593349
  4. Favour AdebayoPhysical Therapist1245072081
  5. Adebanke Adeyemi, MDInternal Medicine Physician1922933936
  6. Emily Adochio-Clancy, MDInfectious Disease Physician1629606975

Verify Mark Brimmeier in five checks

  1. 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
  2. 2LicenseActive license and public ordersWhich Illinois board licenses this profession
    Search for license 085-011947    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
Find 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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Bills Medicare through one group practice

  1. University OF Pittsburgh PhysiciansPittsburgh, PA

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

Mark Brimmeier among 4,926 physician assistant records in Illinois

Mark Brimmeier, PA-C is one of 4,926 physician assistant records with a practice address in Illinois. 82% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2024, is newer than 83% of them.

  • NPI issued2024 · 83% of these records are older, 10% newer
  • In a Medicare fileYes · 82% of these records are
  • In the CMS Doctors and Clinicians fileYes · 69% of these records are
  • Graduated2024 · median 2019 among the 3,407 with a school on file
  • Record last updated2026 · 35% of these records were not updated in five years or more

Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 363A00000X and a Illinois practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).

1,445 physician assistant records list a practice address in Chicago

They are 1,445 of the 63,379 NPPES records with a practice address in Chicago, and 4,926 physician assistant records in Illinois.

All 4,926 in Illinois → Every provider in Chicago → Physician Assistant nationwide →

The 8 physician assistant records with the nearest ZIP codes

  1. Stacy Arens, PA-CChicago, IL 606121568485464
  2. Alejandra Argueta, PA-CChicago, IL 606121407980337
  3. Owen BarmadaChicago, IL 606121851301030
  4. Megan Burns, PA-C, PTChicago, IL 606121265574032
  5. Nicole Burrows, PAChicago, IL 606121689612004
  6. Katherine El, PA-CChicago, IL 606121972524791
  7. M Holden, MPH,MMS, PA-CChicago, IL 606121245259639
  8. Ratna Kanumury, PA-CChicago, IL 606121396757050

Common questions

What is Mark Brimmeier, PA-C's NPI number?

Mark Brimmeier, PA-C's National Provider Identifier (NPI) is 1083441455, issued on Sep 18, 2024. An NPI identifies a provider in billing; it is not a license.

Where is Mark Brimmeier, PA-C located?

The NPPES record lists a practice address at 1620 W Harrison St, Chicago, IL, 60612. Phone: (312) 942-4200. Providers update this record themselves, so call before visiting.

How can I verify Mark Brimmeier, PA-C's license?

NPPES lists Illinois license number 085-011947, as entered by the provider. Search the Illinois board that licenses this profession; the NPPES record confirms identity only.

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.