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SEAN MATHIS LEWALLYN
NPI 1861220691
Social Worker - Clinical in Los Angeles, CA

Active since July 23, 2024
8836 S VERMONT AVE, LOS ANGELES, CA 90044(323) 593-5300 Get Directions Write a Review

NPPES record last updated: September 12, 2025. Verified against the NPPES registry weekly; last sync: August 02, 2026.

Record update history: Sep 12, 2025, Nov 6, 2024, Jul 23, 2024 (3 updates tracked since 2024).

About Sean Mathis Lewallyn NPPES

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

SEAN MATHIS LEWALLYN (NPI 1861220691) is an individual clinical provider in Los Angeles, California and active in the NPI registry since July 2024.

NPPES Registry Identity

NPI1861220691
Entity TypeIndividualMale
Primary Taxonomy1041C0700X
Provider Legal NameSEAN MATHIS LEWALLYN
Location Address8836 S VERMONT AVELos Angeles, CA 90044-4832
Mailing Address8836 S Vermont AveLos Angeles, CA 90044-4832 · (323) 593-5300
Phone(323) 593-5300
Sole ProprietorYes
Enumeration DateJuly 23, 2024
Last NPPES UpdateSeptember 12, 20253 updates tracked since enumeration
NPPES CertifiedSeptember 12, 2025
✔ NPI 1861220691 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtySocial Worker · ClinicalBehavioral Health & Social Service Providers
Taxonomy Code1041C0700X
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.

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.

DANA K. MCDOWELL
Rehabilitation Practitioner
8836 S VERMONT AVE, 8836 S. VERMONT
LOS ANGELES, CA 90044
Los Angeles County (323) 751-3026
JASON ANTHONY BARRETT
Psychiatry & Neurology (Psychiatry)
8836 S VERMONT AVE
LOS ANGELES, CA 90044
Los Angeles County (323) 593-5300
CRIS MARTINEZ VERDUGO
Peer Specialist
8836 S VERMONT AVE
LOS ANGELES, CA 90044
Los Angeles County (323) 593-5300
GIOVANNY ISIDORO
Social Worker (Clinical)
8836 S VERMONT AVE
LOS ANGELES, CA 90044
Los Angeles County (323) 593-5300
DOREEN BALESTRERI
Rehabilitation Practitioner
8836 S VERMONT AVE
LOS ANGELES, CA 90044
Los Angeles County (323) 751-3026
MARIA ESTHER ROSALES
Marriage & Family Therapist
8836 S VERMONT AVE
LOS ANGELES, CA 90044
Los Angeles County (310) 514-5444
SHNIEKA ROYAL
Case Manager/Care Coordinator
8836 S VERMONT AVE
LOS ANGELES, CA 90044
Los Angeles County (223) 751-3026
ASHLEY MEZA
Community Health Worker
8836 S VERMONT AVE
LOS ANGELES, CA 90044
Los Angeles County (323) 751-3026

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 Sean Lewallyn's NPI number?

The NPI number for Sean Lewallyn is 1861220691. It was assigned to this individual provider in the NPPES registry on July 23, 2024.

Where is Sean Lewallyn located?

Sean Lewallyn practices at 8836 S Vermont Ave, Los Angeles, CA 90044. The listed phone number is (323) 593-5300.

What is Sean Lewallyn'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 Sean Lewallyn was last updated on September 12, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 10 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.