Type 2 · Organization ✓ Active NPI ✓ Valid NPI checksum

Northewestern Opthalmic Institute

Q: What is the NPI number for Northewestern Opthalmic Institute?

The NPI for Northewestern Opthalmic Institute is 1881754570, a Type 2 (organization) record in the CMS NPPES registry.

Ophthalmology Physician in Glenview, IL · enumerated 2006 · authorized official Thomas Bournias, Dr.

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

National Provider Identifier

1881754570

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Registry record

Entity type Organization (Type 2)

Legal business name Northewestern Opthalmic Institute

Practice address 3633 West Lake Avenue, Suite 104, Glenview, IL, 60026

Phone (847) 832-3900

Fax (847) 832-3904

Enumeration date Dec 11, 2006

Last updated in NPPES Mar 15, 2013

Taxonomy & classification

207W00000X Ophthalmology Physician Allopathic & Osteopathic Physicians · License 36093343 (IL) Primary

Authorized official

Name Thomas Bournias

Title Dr

Phone (847) 832-3900

Other identifiers

Identifier	Type	State	Issuer
7797487	Other	IL	AETNA
036093343	Medicaid	IL	-

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.

Read the full guide → Validate an NPI →

Frequently asked questions

What is the NPI number for Northewestern Opthalmic Institute?

The NPI for Northewestern Opthalmic Institute is 1881754570, a Type 2 (organization) record in the CMS NPPES registry.

Who is the authorized official for Northewestern Opthalmic Institute?

NPPES lists Thomas Bournias (Dr) as the authorized official for this organization.

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2013-03-15.