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

Mr. Marc Joseph Diamond, LCSW

Individual provider Clinical Social Worker · NPI 1285844381

Mr. Marc Joseph Diamond, LCSW is a Clinical Social Worker in San Leandro, California. Licensed in California. Registered with an NPI since 2007.

Licensed in
CA
In the registry since
2007
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

2045 Fairmont Dr
San Leandro, CA 94578-1088
Phone: (510) 845-2522
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Clinical Social Worker (primary) Taxonomy 1041C0700X · Licence 21820 (CA)

Record details

NPI number1285844381
Entity typeIndividual (Type 1)
GenderMale
Credentials LCSW
Sole proprietorNo
NPI enumeratedMay 23, 2007
Last updated in NPPESJuly 8, 2007

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