Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum Sole proprietor

Dr. Glenn Edward Ostriker, M.D.

Ophthalmology Physician in Stamford, CT · enumerated 2006.

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

National Provider Identifier

1003995796

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Registry record

Entity type Individual (Type 1)

Name Dr. Glenn Edward Ostriker

Credential M.D.

Sex Male

Practice address Stamford, CT, 06902

Phone (203) 348-6300

Fax (203) 961-0710

Enumeration date Nov 3, 2006

Last updated in NPPES Oct 8, 2010

Street address withheld: NPPES sole-proprietor addresses can be home addresses. See our data policy.

Taxonomy & licenses

207W00000X Ophthalmology Physician Allopathic & Osteopathic Physicians · License 26705 (CT) Primary

MD · Doctor of Medicine: A physician who completed medical school (allopathic medicine), residency training, and state licensure. About the MD credential

Other identifiers

Identifier	Type	State	Issuer
001267053	Medicaid	CT	-
2V2621	Other	CT	HEALTHNET
ZS547	Other	CT	OXFORD
526705	Other	CT	CONNECTICARE
26705	Other	CT	LICENSE
6611458	Other	CT	CIGNA
010026705CT01	Other	CT	ANTHEM BC/BS
4304779	Other	CT	AETNA

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

How do I verify Glenn Ostriker's NPI record?

Cross-check NPI 1003995796 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

Is NPI 1003995796 active?

Yes, as of the latest NPPES snapshot, NPI 1003995796 is active (record last updated 2010-10-08).

Other providers at this practice address

Browse all →

Barbara Allen Pediatrics Physician · Stamford, CT NPI 1578605598 Glenn E. Ostriker, M.D. Ophthalmology Physician · Stamford, CT NPI 1851517122 Rainbow Pediatrics, LLC Pediatrics Physician · Stamford, CT NPI 1053575662

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2010-10-08.