Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. Alma Delia Guerrero Villarreal

Pharmacist in Oroville, CA · enumerated 2022.

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

National Provider Identifier

1265164891

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Registry record

Entity type Individual (Type 1)

Name Dr. Alma Delia Guerrero Villarreal

Sex Female

Practice address 2767 Olive Hwy, Oroville, CA, 95966

Phone (530) 533-8500

Enumeration date Jun 30, 2022

Last updated in NPPES Sep 28, 2025

Taxonomy & licenses

183500000X Pharmacist Pharmacy Service Providers · License 88109 (CA) Primary

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

Where does Alma Guerrero Villarreal practice?

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

What is the NPI number for Alma Guerrero Villarreal?

The National Provider Identifier (NPI) for Alma Guerrero Villarreal is 1265164891, a Type 1 (individual) record in the CMS NPPES registry.

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Chakravarthy Maddipati Internal Medicine Physician · Oroville, CA NPI 1538157151 Gregory Schneringer Anatomic Pathology & Clinical Pathology Physician · Oroville, CA NPI 1457341489 Oroville Hospital Rural Acute Care Hospital · Oroville, CA NPI 1790761013 John Schmidt Neurology Physician · Oroville, CA NPI 1295786507 Charles Reiman Anesthesiology Physician · Oroville, CA NPI 1326092552 Priss Harman Emergency Medicine Physician · Oroville, CA NPI 1851346530 Richard Levey Diagnostic Radiology Physician · Oroville, CA NPI 1396783155 North Valley Radiation Oncology Medical Group Inc Radiation Oncology Physician · Oroville, CA NPI 1972541530

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2025-09-28.