Type 2 · Organization ✓ Active NPI ✓ Valid NPI checksum

Stephen R. Keller, O.D., Inc.

Optometrist in Rancho Cucamonga, CA · enumerated 2007 · authorized official Stephen Keller, President.

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

National Provider Identifier

1619019197

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Registry record

Entity type Organization (Type 2)

Legal business name Stephen R. Keller, O.D., Inc.

Other name <Unavail>

Practice address 9596 Baseline Rd, Rancho Cucamonga, CA, 91701

Phone (909) 989-1791

Fax (909) 989-0782

Enumeration date Feb 13, 2007

Last updated in NPPES Dec 3, 2007

Taxonomy & classification

152W00000X Optometrist Eye and Vision Services Providers · License OPT10085T (CA) Primary

Authorized official

Name Stephen Keller

Title President

Phone (909) 989-1791

Other identifiers

Identifier	Type	State	Issuer
GSD003130	Medicaid	CA	-

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 current is this record?

Data comes from the CMS NPPES public dissemination file; this record was last updated in NPPES on 2007-12-03. Verify at npiregistry.cms.hhs.gov.

Where is Stephen R. Keller, O.D., Inc. located?

The practice location on file with NPPES is in Rancho Cucamonga, CA.

Providers at this address

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Nancy Kwan Optometrist · Rancho Cucamonga, CA NPI 1922187855 Morton Optometric Inc Optometrist · Rancho Cucamonga, CA NPI 1487067609

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2007-12-03.