Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of August 10, 2026.

Sean Mathis Lewallyn

Individual provider Clinical Social Worker · NPI 1861220691

Sean Mathis Lewallyn is a Clinical Social Worker in Los Angeles, California. Practices as a sole proprietor. Licensed in California.

Licensed in
CA
In the registry since
2024

Practice location Address checks out

8836 S Vermont Ave
Los Angeles, CA 90044-4832
Phone: (323) 593-5300
Show map & directions

Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Clinical Social Worker (primary) Taxonomy 1041C0700X (CA)

Record details

NPI number1861220691
Entity typeIndividual (Type 1)
GenderMale
Sole proprietorYes
NPI enumeratedJuly 23, 2024
Last updated in NPPESSeptember 12, 2025
Certification dateSeptember 12, 2025

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