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

Mr. Brian William Diehl, LICSW

Individual provider Counselor · NPI 1245679372

Mr. Brian William Diehl, LICSW is a Counselor in Boston, Massachusetts. Practices as a sole proprietor. Registered with an NPI since 2013.

In the registry since
2013
Specialties on file
2
What do these letters mean?
LICSW — Licensed Independent Clinical Social Worker
The title some states use for an independently practising clinical social worker.

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Practice location Address checks out

1601 Washington St
Boston, MA 02118-1951
Phone: (617) 425-2000
Fax: (617) 425-2061
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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 121205
Counselor Taxonomy 101Y00000X

Record details

NPI number1245679372
Entity typeIndividual (Type 1)
GenderMale
Credentials LICSW
Sole proprietorYes
NPI enumeratedJune 21, 2013
Last updated in NPPESMay 5, 2022
Certification dateMay 5, 2022

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