Margaret Ostrowski, PAC
NPI 1134464704 · Physician Assistant · Park Ridge, IL
Enrolled with Medicare as Practitioner - Physician Assistant · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Margaret Ostrowski, PAC is a Physician Assistant provider in Park Ridge, IL (NPI 1134464704).
Provider details
- NPI number
- 1134464704
- Entity type
- Individual
- Primary specialty
- Physician AssistantPhysician Assistants & Advanced Practice Nursing Providers
- Credential
- PAC
- Sex
- Female
- Sole proprietor
- No
- License
- 085004477 (IL)
Specialties & taxonomies
Physician Assistants & Advanced Practice Nursing Providers
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure33% of score
13 yrs in NPPES registry
- Profile completeness33% of score
100% of core fields populated
- Practice footprint20% of score
1 documented practice location
- Open Payments transparency13% of score
Has Open Payments disclosures (2024)
Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$322 across 12 records (Open Payments 2024)
Open Payments discloses payments and transfers of value (meals, travel, consulting, research, royalties) from drug and device makers to providers. This is a transparency signal, not a verdict — such payments are legal and common, and their presence is neither an endorsement nor a criticism. Source: CMS Open Payments, program year 2024.
Practice location
Mailing address
Registry dates
- Enumerated
- 2012-12-07
- Last updated
- 2021-12-08
- Certified
- 2021-12-08
Frequently asked questions
- What is Margaret Ostrowski's NPI number?
- Margaret Ostrowski's National Provider Identifier (NPI) is 1134464704, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Margaret Ostrowski's specialty?
- Margaret Ostrowski is listed in the NPPES registry with a primary specialty of Physician Assistant (Physician Assistants & Advanced Practice Nursing Providers).
- Where is Margaret Ostrowski located?
- Margaret Ostrowski's practice location on file with NPPES is 350 S Northwest Hwy Ste 106, Park Ridge, IL 60068-4262.
- What is Margaret Ostrowski's phone number?
- The practice phone number listed in the NPPES registry for Margaret Ostrowski is (847) 470-1500.
- Does Margaret Ostrowski accept Medicare?
- Margaret Ostrowski is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Margaret Ostrowski's NPI active?
- Yes — Margaret Ostrowski's NPI (1134464704) is active in the NPPES registry as of the last update on 2021-12-08.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.