Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Annette M. Guerrero, M.D.

Family Medicine Physician in Whittier, CA · enumerated 2006 · practices at County of Los Angeles.

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

National Provider Identifier

1265476162

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Registry record

Entity type Individual (Type 1)

Name Annette M. Guerrero

Credential M.D.

Sex Female

Practice address 7643 Painter Ave, Whittier, CA, 90602

Phone (562) 464-5350

Fax (562) 464-0943

Enumeration date Jun 15, 2006

Last updated in NPPES May 16, 2019

Taxonomy & licenses

207Q00000X Family Medicine Physician Allopathic & Osteopathic Physicians · License G64097 (CA) Primary

MD · Doctor of Medicine: A physician who completed medical school (allopathic medicine), residency training, and state licensure. About the MD credential

Other identifiers

Identifier	Type	State	Issuer
P01272665/DU4032	Other	CA	RAILROAD MEDICARE
00G640970	Medicaid	CA	-
00G640970	Other	CA	MEDI-CAL

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

What is the NPI number for Annette Guerrero?

The National Provider Identifier (NPI) for Annette Guerrero is 1265476162, a Type 1 (individual) record in the CMS NPPES registry.

Where does Annette Guerrero practice?

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

Other providers at this practice address

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2019-05-16.