Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Ms. Ann Lynn Chong, L.C.S.W.

Clinical Social Worker in Vacaville, CA · enumerated 2013 · practices at Corrections and Rehabilitation-Headquarters.

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

National Provider Identifier

1649615451

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Registry record

Entity type Individual (Type 1)

Name Ms. Ann Lynn Chong

Credential L.C.S.W.

Sex Female

Practice address 1600 California Drive, Vacaville, CA, 95696

Phone (707) 448-6841

Enumeration date May 7, 2013

Last updated in NPPES May 7, 2013

Taxonomy & licenses

1041C0700X Clinical Social Worker Behavioral Health & Social Service Providers · License LCS 13809 (CA) Primary

LCSW · Licensed Clinical Social Worker: A social worker licensed for clinical practice including mental-health therapy. About the LCSW credential

Other identifiers

Identifier	Type	State	Issuer
13809	Other	CA	LICENSED CLINICAL SOCIAL WORKER

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 1649615451 active?

Yes, as of the latest NPPES snapshot, NPI 1649615451 is active (record last updated 2013-05-07).

How do I verify Ann Lynn Chong's NPI record?

Cross-check NPI 1649615451 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 2013-05-07.