Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. Efrain Mascareno, O.D.

Optometrist in Chula Vista, CA · enumerated 2008 · practices at Efrain Mascareno Od Apc.

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

National Provider Identifier

1457507279

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Registry record

Entity type Individual (Type 1)

Name Dr. Efrain Mascareno

Credential O.D.

Sex Male

Practice address 440 4th Ave, Chula Vista, CA, 91910

Phone (619) 427-2020

Enumeration date Aug 12, 2008

Last updated in NPPES Apr 17, 2013

Taxonomy & licenses

152W00000X Optometrist Eye and Vision Services Providers · License 10906 (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
SD0109061	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

Where does Efrain Mascareno practice?

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

What is the NPI number for Efrain Mascareno?

The National Provider Identifier (NPI) for Efrain Mascareno is 1457507279, a Type 1 (individual) record in the CMS NPPES registry.

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Efrain Mascareno Od Apc Optometrist · Chula Vista, CA NPI 1073687851

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2013-04-17.