MS. JUSTINE MASON UNDERHILL LCSW
NPI 1942377957
Social Worker - Clinical in San Francisco, CA

Active since November 29, 2006
1001 POTRERO AVE # 6B, SAN FRANCISCO, CA 94110(628) 206-4444 Get Directions Write a Review

NPPES record last updated: August 18, 2021. Verified against the NPPES registry weekly; last sync: July 19, 2026.

About Ms. Justine Mason Underhill Lcsw NPPES

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

MS. JUSTINE MASON UNDERHILL LCSW (NPI 1942377957) is an individual clinical provider in San Francisco, California, licensed in California (LCSW 24079) and active in the NPI registry since November 2006. She maintains 2 additional practice locations.

NPPES Registry Identity

NPI1942377957
Entity TypeIndividualFemale
Primary Taxonomy1041C0700X
Provider Legal NameMS. JUSTINE MASON UNDERHILLCredential: LCSW
Location Address1001 POTRERO AVE # 6BSan Francisco, CA 94110-3518
Mailing Address46 Delano AveSan Francisco, CA 94112-2520 · (415) 476-7222
Sole ProprietorNo
Enumeration DateNovember 29, 2006
Last NPPES UpdateAugust 18, 2021
NPPES CertifiedAugust 18, 2021
NPI 1942377957 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 · LCSW 24079
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.

1001 POTRERO AVE # 6B, San Francisco, CA 94110

Secondary Practice Locations 2

Location 1401 Parnassus Ave, Box CAS-0984San Francisco, CA 94143-2211 · Phone (415) 476-7222
Location 21100 Sanchez StSan Francisco, CA 94114-3825 · Phone (415) 672-4700

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.

Clinic/Center (Adolescent and Children Mental Health)
1001 POTRERO AVE # 6B
SAN FRANCISCO, CA 94110
Student in an Organized Health Care Education/Training Program
1001 POTRERO AVE # 6B
SAN FRANCISCO, CA 94110
Psychiatry & Neurology (Psychiatry)
1001 POTRERO AVE # 6B
SAN FRANCISCO, CA 94110
Community Health Worker
1001 POTRERO AVE # 6B
SAN FRANCISCO, CA 94110
Student in an Organized Health Care Education/Training Program
1001 POTRERO AVE # 6B
SAN FRANCISCO, CA 94110
Student in an Organized Health Care Education/Training Program
1001 POTRERO AVE # 6B
SAN FRANCISCO, CA 94110
Speech-Language Pathologist
1001 POTRERO AVE # 6B
SAN FRANCISCO, CA 94110
Psychiatry & Neurology (Psychiatry)
1001 POTRERO AVE # 6B
SAN FRANCISCO, CA 94110

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 Justine Underhill's NPI number?

The NPI number for Justine Underhill is 1942377957. It was assigned to this individual provider in the NPPES registry on November 29, 2006.

Where is Justine Underhill located?

Justine Underhill practices at 1001 Potrero Ave # 6B, San Francisco, CA 94110. The listed phone number is (628) 206-4444.

What is Justine Underhill'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 Justine Underhill was last updated on August 18, 2021. NPI Profile syncs with the weekly NPPES data releases published by CMS.