Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Gwyneth Olivia Truman

Social Worker in Irwindale, CA · enumerated 2022.

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

National Provider Identifier

1699403345

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Registry record

Entity type Individual (Type 1)

Name Gwyneth Olivia Truman

Sex Female

Practice address 13001 Ramona Blvd, Irwindale, CA, 91706

Phone (626) 480-8107

Enumeration date Aug 10, 2022

Last updated in NPPES Dec 1, 2025

Taxonomy & licenses

104100000X Social Worker Behavioral Health & Social Service Providers · License 123740 (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 Gwyneth Truman practice?

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

What is the NPI number for Gwyneth Truman?

The National Provider Identifier (NPI) for Gwyneth Truman is 1699403345, a Type 1 (individual) record in the CMS NPPES registry.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2025-12-01.