Recently Updated NPI Information — some details in this NPI profile have been updated in the NPI registry within the last 60 days.

MS. MARGARET DENISE TAHAN LCSW
NPI 1366411886
Social Worker - Clinical in Martinez, CA

Active since March 16, 2006
150 MUIR RD BLDG 24, MARTINEZ, CA 94553(925) 372-2545 Get Directions Write a Review

NPPES record last updated: September 21, 2026. Verified against the NPPES registry weekly; last sync: October 11, 2026.

Record update history: Sep 21, 2026, Jul 13, 2026 (2 updates tracked since 2026).

About Ms. Margaret Denise Tahan Lcsw NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

MS. MARGARET DENISE TAHAN LCSW (NPI 1366411886) is an individual clinical provider in Martinez, California, licensed in California (LCS20059) and active in the NPI registry since March 2006.

NPPES Registry Identity

NPI1366411886
Entity TypeIndividualFemale
Primary Taxonomy1041C0700X
Provider Legal NameMS. MARGARET DENISE TAHANCredential: LCSW
Location Address150 MUIR RD BLDG 24Martinez, CA 94553-4668
Mailing Address150 Muir Rd Bldg 24Martinez, CA 94553-4668 · (925) 372-2545
Sole ProprietorNo
Enumeration DateMarch 16, 2006
Last NPPES UpdateSeptember 21, 20262 updates tracked since enumeration
NPPES CertifiedSeptember 21, 2026
✔ NPI 1366411886 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtySocial Worker · ClinicalBehavioral Health & Social Service Providers
Taxonomy Code1041C0700X
License✔ Licensed in CA · LCS20059
Definition
A social worker who holds a master's or doctoral degree in social work from an accredited school of social work in addition to at least two years of post-master's supervised experience in a clinical setting. The social worker must be licensed, certified, or registered at the clinical level in the jurisdiction of practice. A clinical social worker provides direct services, including interventions focused on interpersonal interactions, intrapsychic dynamics, and life management issues. Clinical social work services are based on bio-psychosocial perspectives. Services consist of assessment, diagnosis, treatment (including psychotherapy and counseling), client-centered advocacy, consultation, evaluation, and prevention of mental illness, emotional, or behavioral disturbances.
150 MUIR RD BLDG 24, Martinez, CA 94553

Other Providers at the Same Location NPPES 4

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

Nurse Practitioner (Psychiatric/Mental Health)
150 MUIR RD BLDG 24
MARTINEZ, CA 94553
Psychiatry & Neurology (Addiction Psychiatry)
150 MUIR RD BLDG 24
MARTINEZ, CA 94553
Social Worker (Clinical)
150 MUIR RD BLDG 24
MARTINEZ, CA 94553
Student in an Organized Health Care Education/Training Program
150 MUIR RD BLDG 24
MARTINEZ, CA 94553

Frequently Asked Questions NPPES & CMS

Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.

What is Margaret Tahan's NPI number?

The NPI number for Margaret Tahan is 1366411886. It was assigned to this individual provider in the NPPES registry on March 16, 2006.

Where is Margaret Tahan located?

Margaret Tahan practices at 150 Muir Rd Bldg 24, Martinez, CA 94553. The listed phone number is (925) 372-2545.

What is Margaret Tahan's specialty?

The primary specialty registered for this NPI is Social Worker, specializing in Clinical, with taxonomy code 1041C0700X.

When was this NPI record last updated?

The NPPES record for Margaret Tahan was last updated on September 21, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 28 days ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.