Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. Charles E Keller, O.D.

Optometrist in Warren, PA · enumerated 2005.

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

National Provider Identifier

1245212885

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Registry record

Entity type Individual (Type 1)

Name Dr. Charles E Keller

Credential O.D.

Sex Male

Practice address 103 W Saint Clair St, Warren, PA, 16365

Phone (814) 726-2020

Fax (814) 726-1215

Enumeration date Nov 18, 2005

Last updated in NPPES Sep 8, 2010

Taxonomy & licenses

152W00000X Optometrist Eye and Vision Services Providers · License OE5123T (PA) Primary

OD · Doctor of Optometry: A licensed optometrist providing primary vision care, eye exams, and corrective lenses. About the OD credential

Other identifiers

Identifier	Type	State	Issuer
000546016	Medicaid	PA	-

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

Where does Charles Keller practice?

The practice location on file with NPPES is in Warren, PA. Providers can have multiple locations; NPPES lists the primary practice address.

What is the NPI number for Charles Keller?

The National Provider Identifier (NPI) for Charles Keller is 1245212885, a Type 1 (individual) record in the CMS NPPES registry.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2010-09-08.