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

Individual provider Clinical Social Worker · NPI 1982820650

Mr. William Martin Breer, LCSW is a Clinical Social Worker in Grand Terrace, California. Practices as a sole proprietor. Licensed in California.

Licensed in
CA
In the registry since
2007
Specialties on file
2
What do these letters mean?
LCSW — Licensed Clinical Social Worker
A social worker licensed to diagnose and treat mental health conditions independently.

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Practice location Address checks out

22365 Barton Rd Ste 314
Grand Terrace, CA 92313-5015
Phone: (909) 825-2151
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Marriage & Family Therapist (primary) Taxonomy 106H00000X · Licence M14503 (CA)
Clinical Social Worker Taxonomy 1041C0700X · Licence LCS 7330 (CA)

Record details

NPI number1982820650
Entity typeIndividual (Type 1)
GenderMale
Credentials LCSW
Sole proprietorYes
NPI enumeratedApril 18, 2007
Last updated in NPPESSeptember 11, 2025

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