Margaret R. Ostrowski, PAC
Physician Assistant · Park Ridge, IL
Margaret R. Ostrowski, PAC is a physician assistant with a practice address in Park Ridge, Illinois, and NPI 1134464704, issued on Dec 7, 2012. Check the license (Illinois 085004477, as entered in NPPES) with the Illinois board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Margaret R. Ostrowski
- Credential
- PAC
- Primary taxonomy
- Physician Assistant 363A00000X
- License number
- 085004477 IL
Self-reported in NPPES; status is on the state search - Practice location
- 350 S Northwest Hwy Ste 106, Park Ridge, IL 60068
- Phone
- (847) 470-1500
- Enumerated
- Dec 7, 2012
- Record last updated
- Dec 8, 2021 (not updated in 5 years: call before relying on the address or phone)
- Fax
- (847) 470-1550
- Entity
- Type 1 · individual
8 nearest physician assistant records → All 4,926 in Illinois → Look up another NPI →
Also registered at 350 S Northwest Hwy Ste 106
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Margaret R. Ostrowski in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich Illinois board licenses this profession
Search for license 085004477Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Industry payments in 2024: $322.41
12 payments; by number, the most common kind was food and beverage; the largest payer was Galderma Laboratories, L.P. The 64,719 providers of this specialty with any payment received $841.65 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
Margaret R. Ostrowski among 4,926 physician assistant records in Illinois
Margaret R. Ostrowski, PAC 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 2012, is newer than 27% of them.
- NPI issued2012 · 27% of these records are older, 71% newer
- In a Medicare fileYes · 82% of these records are
- In the CMS Doctors and Clinicians fileNo · 69% of these records are
- Record last updated2021 · 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).
61 physician assistant records list a practice address in Park Ridge
They are 61 of the 2,577 NPPES records with a practice address in Park Ridge, and 4,926 physician assistant records in Illinois.
All 4,926 in Illinois → Every provider in Park Ridge → Physician Assistant nationwide →
The 8 physician assistant records with the nearest ZIP codes
- Kelly Ali, PHYSICIAN ASSISTANTPark Ridge, IL 600681659656049
- Dominique Azarcon, PA-CPark Ridge, IL 600681780918920
- Carissa Griffith, P.A.Park Ridge, IL 600681134368194
- Brian Hennig, PA-CPark Ridge, IL 600681457439408
- Leah Kampas, P.A.Park Ridge, IL 600681588778906
- Tara Lykowski, PA-CPark Ridge, IL 600681023092319
- Ashley Mores, PA-CPark Ridge, IL 600681558617910
- Donna Mullahy, PA-CPark Ridge, IL 600681386722783
Common questions
What is Margaret R. Ostrowski, PAC's NPI number?
Margaret R. Ostrowski, PAC's National Provider Identifier (NPI) is 1134464704, issued on Dec 7, 2012. An NPI identifies a provider in billing; it is not a license.
Where is Margaret R. Ostrowski, PAC located?
The NPPES record lists a practice address at 350 S Northwest Hwy Ste 106, Park Ridge, IL, 60068. Phone: (847) 470-1500. Providers update this record themselves, so call before visiting.
How can I verify Margaret R. Ostrowski, PAC's license?
NPPES lists Illinois license number 085004477, 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.
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.