Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum Sole proprietor

Mr. Mitchell Eckstein, LCSW

Clinical Social Worker in San Mateo, CA · enumerated 2014.

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

National Provider Identifier

1316346232

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Registry record

Entity type Individual (Type 1)

Name Mr. Mitchell Eckstein

Credential LCSW

Sex Male

Practice address San Mateo, CA, 94402

Phone (650) 458-7920

Fax (877) 991-8755

Enumeration date Aug 15, 2014

Last updated in NPPES Aug 27, 2018

Street address withheld: NPPES sole-proprietor addresses can be home addresses. See our data policy.

Taxonomy & licenses

1041C0700X Clinical Social Worker Behavioral Health & Social Service Providers · License LCS18381 (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.

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Frequently asked questions

How do I verify Mitchell Eckstein's NPI record?

Cross-check NPI 1316346232 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

Is NPI 1316346232 active?

Yes, as of the latest NPPES snapshot, NPI 1316346232 is active (record last updated 2018-08-27).

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Dui Chen Clinical Social Worker · San Mateo, CA NPI 1881001188

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2018-08-27.