NPPES file of Aug 9, 2026

Megan M. Mastalerz

Physician Assistant · Elmhurst, IL

Megan M. Mastalerz is a physician assistant with a practice address in Elmhurst, Illinois, and NPI 1093695447, issued on Sep 5, 2025. Check the license (Illinois 085011185, 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
1093695447
Name
Megan M. Mastalerz
Primary taxonomy
Physician Assistant 363A00000X
License number
085011185 IL
Self-reported in NPPES; status is on the state search
Practice location
133 E Brush Hill RD Ste 110, Elmhurst, IL 60126
Phone
(630) 545-7565
Enumerated
Sep 5, 2025
Record last updated
Oct 17, 2025
Medicare enrollment
Enrolled (PECOS I20251001003160); 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 133 E Brush Hill RD Ste 110

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

  1. Asrar Ahmed, D.OHospitalist Physician1407298334
  2. Faith Almieri, APNNurse Practitioner1497511752
  3. Ashish Arora, MDGastroenterology Physician1336157171
  4. Viveka Boddipalli, M.D., MBAPulmonary Disease Physician1225262934
  5. Brett Collander, M.D.Pulmonary Disease Physician1497088322
  6. Katrina Johnson, NPPrimary Care Nurse Practitioner1679664924

Verify Megan M. Mastalerz 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 085011185    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. Dupage Medical Group LtdNaperville, IL

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

Megan M. Mastalerz among 4,926 physician assistant records in Illinois

Megan M. Mastalerz 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 2025, is newer than 90% of them.

  • NPI issued2025 · 90% of these records are older, 3% 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 updated2025 · 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).

21 physician assistant records list a practice address in Elmhurst

They are 21 of the 1,540 NPPES records with a practice address in Elmhurst, and 4,926 physician assistant records in Illinois.

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

The 8 physician assistant records with the nearest ZIP codes

  1. Aysha Ahmed, PA-CElmhurst, IL 601261053880138
  2. David Avina, P.A.Elmhurst, IL 601261730569807
  3. Joseph Baez, PA- CElmhurst, IL 601261730520529
  4. Meredith BrackettElmhurst, IL 601261407326382
  5. Abbey Graves, PA-CElmhurst, IL 601261700489093
  6. Nabihah Khan, PA-CElmhurst, IL 601261144793308
  7. Kendall Kilander, PA-CElmhurst, IL 601261013552595
  8. Yunah Lee, PA-CElmhurst, IL 601261396382933

Common questions

What is Megan M. Mastalerz's NPI number?

Megan M. Mastalerz's National Provider Identifier (NPI) is 1093695447, issued on Sep 5, 2025. An NPI identifies a provider in billing; it is not a license.

Where is Megan M. Mastalerz located?

The NPPES record lists a practice address at 133 E Brush Hill RD Ste 110, Elmhurst, IL, 60126. Phone: (630) 545-7565. Providers update this record themselves, so call before visiting.

How can I verify Megan M. Mastalerz's license?

NPPES lists Illinois license number 085011185, 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.