Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Gerardo Guerrero

Registered Nurse in Oakley, CA · enumerated 2026.

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

National Provider Identifier

1154255784

Verified

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Registry record

Entity type Individual (Type 1)

Name Gerardo Guerrero

Sex Male

Practice address 2220 Truman Ln, Oakley, CA, 94561

Phone (925) 330-7674

Enumeration date Jun 9, 2026

Last updated in NPPES Jun 9, 2026

Taxonomy & licenses

163W00000X Registered Nurse Nursing Service Providers · License 728531 (CA) Primary

Other identifiers

Identifier	Type	State	Issuer
333542393	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.

Read the full guide → Validate an NPI →

Frequently asked questions

How do I verify Gerardo Guerrero's NPI record?

Cross-check NPI 1154255784 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

Is NPI 1154255784 active?

Yes, as of the latest NPPES snapshot, NPI 1154255784 is active (record last updated 2026-06-09).

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2026-06-09.