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
Mailing address5 Neponset St Fl Street2, Worcester, MA 01606-2714

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