Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Alegra Isabel Mendez, MD

Internal Medicine Physician in San Francisco, CA · enumerated 2022.

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

National Provider Identifier

1669121265

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Registry record

Entity type Individual (Type 1)

Name Alegra Isabel Mendez

Credential MD

Sex Female

Practice address 1101 Van Ness Ave Ste 1100, San Francisco, CA, 94109

Phone (415) 600-6000

Enumeration date Mar 21, 2022

Last updated in NPPES Aug 19, 2025

Taxonomy & licenses

207R00000X Internal Medicine Physician Allopathic & Osteopathic Physicians · License A189472 (CA) Primary

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

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

Is NPI 1669121265 active?

Yes, as of the latest NPPES snapshot, NPI 1669121265 is active (record last updated 2025-08-19).

How do I verify Alegra Mendez's NPI record?

Cross-check NPI 1669121265 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2025-08-19.