Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Cynthia Lynn Ahnin, LCSW

Clinical Social Worker in Elk Grove, CA · enumerated 2011 · practices at Elk Grove Unified School District.

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

National Provider Identifier

1639453111

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Registry record

Entity type Individual (Type 1)

Name Cynthia Lynn Ahnin

Credential LCSW

Sex Female

Practice address 9510 Elk Grove Florin Rd, Elk Grove, CA, 95624

Phone (916) 202-3638

Enumeration date Oct 3, 2011

Last updated in NPPES Jun 3, 2026

Taxonomy & licenses

1041C0700X Clinical Social Worker Behavioral Health & Social Service Providers · License 16153 (CA) Primary

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

Where does Cynthia Ahnin practice?

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

What is the NPI number for Cynthia Ahnin?

The National Provider Identifier (NPI) for Cynthia Ahnin is 1639453111, 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 2026-06-03.