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Ms. Margaret Denise Tahan, LCSW

Clinical Social Worker in Martinez, CA · enumerated 2006.

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

National Provider Identifier

1366411886

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Registry record

Entity type Individual (Type 1)
Name Ms. Margaret Denise Tahan
Credential LCSW
Sex Female
Practice address 150 Muir Rd Bldg 24, Martinez, CA, 94553
Phone (925) 372-2545
Enumeration date Mar 16, 2006
Last updated in NPPES Sep 21, 2026

Taxonomy & licenses

1041C0700X Clinical Social Worker Behavioral Health & Social Service Providers · License LCS20059 (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 Margaret Tahan's NPI record?
Cross-check NPI 1366411886 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.
Is NPI 1366411886 active?
Yes, as of the latest NPPES snapshot, NPI 1366411886 is active (record last updated 2026-09-21).

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2026-09-21.