Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. Guillermo Saenz Zavala, MD

Family Medicine Physician in Fontana, CA · enumerated 2015.

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

National Provider Identifier

1720475478

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Registry record

Entity type Individual (Type 1)

Name Dr. Guillermo Saenz Zavala

Credential MD

Sex Male

Practice address 17234 Valley Blvd, Fontana, CA, 92335

Phone (909) 427-5084

Fax (909) 427-5022

Enumeration date Apr 21, 2015

Last updated in NPPES Aug 2, 2018

Taxonomy & licenses

390200000X Student in an Organized Health Care Education/Training Program Student, Health Care Secondary

207Q00000X Family Medicine Physician Allopathic & Osteopathic Physicians · License A153513 (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

How do I verify Guillermo Saenz Zavala's NPI record?

Cross-check NPI 1720475478 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

Is NPI 1720475478 active?

Yes, as of the latest NPPES snapshot, NPI 1720475478 is active (record last updated 2018-08-02).

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2018-08-02.