Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Ms. Judith Larson, RN

Registered Nurse in Pittsburg, CA · enumerated 2012.

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

National Provider Identifier

1528334547

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Registry record

Entity type Individual (Type 1)

Name Ms. Judith Larson

Credential RN

Sex Female

Practice address 2311 Loveridge Rd, Pittsburg, CA, 94565

Phone (925) 431-2642

Enumeration date Mar 23, 2012

Last updated in NPPES Jun 21, 2023

Taxonomy & licenses

163W00000X Registered Nurse Nursing Service Providers · License 493694 (CA) Primary

RN · Registered Nurse: A nurse who completed an accredited nursing program and passed the NCLEX-RN licensure exam. About the RN 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 1528334547 active?

Yes, as of the latest NPPES snapshot, NPI 1528334547 is active (record last updated 2023-06-21).

How do I verify Judith Larson's NPI record?

Cross-check NPI 1528334547 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 2023-06-21.