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

William B. Greenberg, LCSW

Individual provider Clinical Social Worker · NPI 1003939521

William B. Greenberg, LCSW is a Clinical Social Worker in San Francisco, 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

1650 Mission Street 4th Fl
San Francisco, CA 94103 Not confirmed with CMS for 19 years — call before visiting
Phone: (415) 355-3695
Fax: (415) 355-3683
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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 LCS9040 (CA)

Record details

NPI number1003939521
Entity typeIndividual (Type 1)
GenderMale
Credentials LCSW
Sole proprietorNo
NPI enumeratedApril 9, 2007
Last updated in NPPESAugust 10, 2007

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