MRS. JOANNA MAY TOZER LCSW
NPI 1144429234
Social Worker - Clinical in San Mateo, CA

Q: What is Joanna Tozer's NPI number?

The NPI number for Joanna Tozer is 1144429234. It was assigned to this individual provider in the NPPES registry on July 17, 2007.

Q: What is Joanna Tozer's specialty?

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

Q: Is Joanna Tozer enrolled in Medicare?

No. Joanna Tozer has opted out of Medicare through October 1, 2026. Care is provided under private contracts, and Medicare does not pay for services furnished by providers who have opted out. The provider remains eligible to order and refer services for Medicare patients.

Q: When was this NPI record last updated?

The NPPES record for Joanna Tozer was last updated on January 7, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 19 months 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.

Active since July 17, 2007Opted out of Medicare · through Oct 1, 2026

327 N SAN MATEO DR STE 10, SAN MATEO, CA 94401(310) 871-0314 Get Directions Write a Review

NPPES record last updated: January 7, 2025. Verified against the NPPES registry weekly; last sync: August 16, 2026.

Record update history: Jan 7, 2025, May 27, 2022 (2 updates tracked since 2022).

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About Mrs. Joanna May Tozer Lcsw NPPES

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

MRS. JOANNA MAY TOZER LCSW (NPI 1144429234) is an individual clinical provider in San Mateo, California, licensed in California (26956) and active in the NPI registry since July 2007. She has opted out of Medicare through October 1, 2026 and remains eligible to order and refer.

NPPES Registry Identity

NPI1144429234

Entity TypeIndividualFemale

Primary Taxonomy1041C0700X

Provider Legal NameMRS. JOANNA MAY TOZERCredential: LCSW

Location Address327 N SAN MATEO DR STE 10San Mateo, CA 94401-2585

Mailing Address327 N San Mateo Dr Ste 10San Mateo, CA 94401-2585 · (310) 871-0314

Phone(310) 871-0314

Sole ProprietorNo

Enumeration DateJuly 17, 2007

Last NPPES UpdateJanuary 7, 20252 updates tracked since enumeration

NPPES CertifiedJanuary 7, 2025

✔ NPI 1144429234 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 · 26956

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.

327 N SAN MATEO DR STE 10, San Mateo, CA 94401

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Medicare Participation & PECOS CMS

Medicare enrollment, assignment, and ordering and referring status from the CMS PECOS system.

Medicare Enrollment Status

ⓘ

Opted out of Medicare

Mrs. Joanna May Tozer Lcsw has filed a Medicare opt-out affidavit. Services are provided under private contract between the provider and the patient, and are not billed to or reimbursed by Medicare. The opt-out is on file from October 1, 2024 through October 1, 2026.

Opt-Out Effective DateOctober 1, 2024

Opt-Out In Effect ThroughOctober 1, 2026Opt-out affidavits renew automatically every two years unless cancelled

Other Providers at the Same Location NPPES 3

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

BELL FAMILY THERAPY AND HEALTH SOLUTIONS A PROFESSIONAL CORPORATI

Marriage & Family Therapist

327 N SAN MATEO DR STE 10
SAN MATEO, CA 94401

San Mateo County (415) 710-9777

INTROSPECTIVE THERAPY BY JOANNA TOZER, LICENSED CLINICAL SOCIAL WORKER, INC.

Clinic/Center (Adult Mental Health)

327 N SAN MATEO DR STE 10
SAN MATEO, CA 94401

San Mateo County (310) 871-0314

DR. WILLIAM ANDERSON BELL LMFT, PH.D.

Marriage & Family Therapist

327 N SAN MATEO DR STE 10
SAN MATEO, CA 94401

San Mateo County (415) 710-9777

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 Joanna Tozer's NPI number?

The NPI number for Joanna Tozer is 1144429234. It was assigned to this individual provider in the NPPES registry on July 17, 2007.

Where is Joanna Tozer located?

Joanna Tozer practices at 327 N San Mateo Dr Ste 10, San Mateo, CA 94401. The listed phone number is (310) 871-0314.

What is Joanna Tozer's specialty?

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

Is Joanna Tozer enrolled in Medicare?

No. Joanna Tozer has opted out of Medicare through October 1, 2026. Care is provided under private contracts, and Medicare does not pay for services furnished by providers who have opted out. The provider remains eligible to order and refer services for Medicare patients.

When was this NPI record last updated?

The NPPES record for Joanna Tozer was last updated on January 7, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 19 months 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.