MR. STEPHEN JOSEPH IRWIN LCSW
NPI 1093404485
Social Worker - Clinical in San Francisco, CA

Active since May 02, 2023
1263 MISSION ST, SAN FRANCISCO, CA 94103(628) 758-2433(415) 514-6466 Get Directions Write a Review

NPPES record last updated: January 26, 2026. Verified against the NPPES registry weekly; last sync: July 26, 2026.

Record update history: Jan 26, 2026, May 10, 2023, May 2, 2023 (3 updates tracked since 2023).

About Mr. Stephen Joseph Irwin Lcsw NPPES

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

MR. STEPHEN JOSEPH IRWIN LCSW (NPI 1093404485) is an individual clinical provider in San Francisco, California, licensed in California (136529) and active in the NPI registry since May 2023.

NPPES Registry Identity

NPI1093404485
Entity TypeIndividualMale
Primary Taxonomy1041C0700X
Provider Legal NameMR. STEPHEN JOSEPH IRWINCredential: LCSW
Location Address1263 MISSION STSan Francisco, CA 94103-2705
Mailing Address1263 Mission StSan Francisco, CA 94103-2705 · (628) 758-2433 · Fax (415) 514-6466
Fax(415) 514-6466
Sole ProprietorYes
Enumeration DateMay 2, 2023
Last NPPES UpdateJanuary 26, 20263 updates tracked since enumeration
NPPES CertifiedJanuary 26, 2026
NPI 1093404485 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

Primary SpecialtySocial Worker · ClinicalBehavioral Health & Social Service Providers
Taxonomy Code1041C0700X
License Licensed in CA · 136529
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.

Also ListedCase Manager/Care CoordinatorTaxonomy 171M00000X · License 136529 (CA)
1263 MISSION ST, San Francisco, CA 94103

Other Identifiers 3

Other136529CA · Lcsw
Other211Y-W011-SCNXCA · Msw
Other104780CA · Asw

Group Practice 1

Group TaxonomyThis provider is a business group of one or more individual practitioners, who practice with different areas of specialization.193200000X MULTI-SPECIALTY GROUP

Other Providers at the Same Location NPPES 20

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

Technician, Other
1263 MISSION ST
SAN FRANCISCO, CA 94103
Nurse Practitioner
1263 MISSION ST
SAN FRANCISCO, CA 94103
Rehabilitation Practitioner
1263 MISSION ST
SAN FRANCISCO, CA 94103
Specialist
1263 MISSION ST
SAN FRANCISCO, CA 94103
Student in an Organized Health Care Education/Training Program
1263 MISSION ST
SAN FRANCISCO, CA 94103
Case Manager/Care Coordinator
1263 MISSION ST
SAN FRANCISCO, CA 94103
Social Worker (Clinical)
1263 MISSION ST
SAN FRANCISCO, CA 94103
Counselor (Professional)
1263 MISSION ST
SAN FRANCISCO, CA 94103

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 Stephen Irwin's NPI number?

The NPI number for Stephen Irwin is 1093404485. It was assigned to this individual provider in the NPPES registry on May 2, 2023.

Where is Stephen Irwin located?

Stephen Irwin practices at 1263 Mission St, San Francisco, CA 94103. The listed phone number is (628) 758-2433.

What is Stephen Irwin'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 Stephen Irwin was last updated on January 26, 2026. NPI Profile syncs with the weekly NPPES data releases published by CMS.