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Thomas M. Grischow, O.D., Inc.

Optometrist in Warren, OH · enumerated 2007 · authorized official Thomas Grischow, President.

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

National Provider Identifier

1144340589

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Registry record

Entity type Organization (Type 2)
Legal business name Thomas M. Grischow, O.D., Inc.
Other name <Unavail>
Practice address 199 Niles Cortland Rd Se, Warren, OH, 44484
Phone (330) 856-1782
Fax (330) 856-2760
Enumeration date Mar 30, 2007
Last updated in NPPES Apr 20, 2008

Taxonomy & classification

152W00000X Optometrist Eye and Vision Services Providers · License 4457 T1113 (OH) Primary

Authorized official

Name Thomas Grischow
Title President
Phone (330) 856-1782

Other identifiers

Identifier Type State Issuer
OP0517 Other OH EYEMED
52322 Other OH DAVIS VISION
29416 Other OH SPECTERA
279544883006 Other OH MEDICAL MUTUAL
7483230 Other OH AETNA
2559539 Medicaid OH -
000000364655 Other OH ANTHEM

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 type of organization is Thomas M. Grischow, O.D., Inc.?
Thomas M. Grischow, O.D., Inc. is registered in NPPES as a Optometrist (its primary provider taxonomy).
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.

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2008-04-20.