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

John P. McMahon, LCSW

Individual provider Social Worker · NPI 1548464092

John P. McMahon, LCSW is a Social Worker in Westborough, Massachusetts. Licensed in Massachusetts. Registered with an NPI since 2007.

Licensed in
MA
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.

See every abbreviation used in this directory →

Practice location Address checks out

900 Union St
Westborough, MA 01581-5408
Phone: (508) 898-2338
Fax: (508) 366-9938
Show map & directions

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

Specialties & licences

Social Worker (primary) Taxonomy 104100000X · Licence 213699 (MA)

Record details

NPI number1548464092
Entity typeIndividual (Type 1)
GenderMale
Credentials LCSW
Sole proprietorNo
NPI enumeratedJune 11, 2007
Last updated in NPPESMarch 26, 2019

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