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Arthur L Ostrowski MD Sc

Internal Medicine Physician in Barrington, IL · enumerated 2007 · authorized official Arthur Ostrowski, President.

Data current as of Jul 13, 2026 · sourced from CMS NPPES

National Provider Identifier

1518156280

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Registry record

Entity type Organization (Type 2)
Legal business name Arthur L Ostrowski MD Sc
Practice address 800 Fox Gln, Barrington, IL, 60010
Phone (847) 382-5850
Fax (847) 382-5852
Enumeration date Oct 18, 2007
Last updated in NPPES Oct 18, 2007

Taxonomy & classification

207R00000X Internal Medicine Physician Allopathic & Osteopathic Physicians Primary
207R00000X Internal Medicine Physician Allopathic & Osteopathic Physicians Secondary

Authorized official

Name Arthur Ostrowski
Title President
Phone (847) 382-5850

What is an NPI number?

A National Provider Identifier (NPI) is a unique 10-digit number that CMS assigns to every U.S. healthcare provider and organization under HIPAA. Type 1 NPIs identify individual providers; Type 2 NPIs identify organizations. The NPI appears on insurance claims, prescriptions, and credentialing paperwork, and never changes, even if the provider moves or changes specialty.

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Frequently asked questions

What is a Type 2 NPI?
A Type 2 NPI identifies an organization (group practice, hospital, pharmacy, lab), while Type 1 NPIs identify individual providers. Organizations bill under their Type 2 NPI.
What type of organization is Arthur L Ostrowski MD Sc?
Arthur L Ostrowski MD Sc is registered in NPPES as a Internal Medicine Physician (its primary provider taxonomy).

Providers at this address

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2007-10-18.