Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. Dennis Watanabe, O.D.

Optometrist in South Gate, CA · enumerated 2006.

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

National Provider Identifier

1851404040

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Registry record

Entity type Individual (Type 1)

Name Dr. Dennis Watanabe

Credential O.D.

Sex Male

Practice address 4476 Tweedy Blvd, South Gate, CA, 90280

Phone (323) 563-9499

Fax (323) 563-9056

Enumeration date Aug 15, 2006

Last updated in NPPES Jul 15, 2016

Taxonomy & licenses

152W00000X Optometrist Eye and Vision Services Providers · License OPT7702T (CA) Secondary

152W00000X Optometrist Eye and Vision Services Providers · License 7702T (CA) 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
SD007020	Medicaid	CA	-
SD0077020	Medicaid	CA	-
410046776	Other	CA	MEDICARE RAILROAD
00OPT7702T0	Other	CA	BLUE SHIELD
410046776	Other	CA	RAILROAD MEDICARE

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 Dennis Watanabe's NPI record?

Cross-check NPI 1851404040 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

Is NPI 1851404040 active?

Yes, as of the latest NPPES snapshot, NPI 1851404040 is active (record last updated 2016-07-15).

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2016-07-15.