Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of August 10, 2026.
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Mr. Patrick S Griswold, LMHC, LADC1

Individual provider Addiction (Substance Use Disorder) Counselor · NPI 1639259146

Mr. Patrick S Griswold, LMHC, LADC1 is an Addiction (Substance Use Disorder) Counselor in Somerville, Massachusetts. Practices as a sole proprietor. Licensed in Massachusetts.

Licensed in
MA
In the registry since
2006
Specialties on file
2
What do these letters mean?
LMHC — Licensed Mental Health Counselor
A licensed mental health counsellor; the title used in Florida, New York and Washington among others.

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Practice location Address checks out

260 Beacon St
Somerville, MA 02143-3534
Phone: (617) 661-5700
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Addiction (Substance Use Disorder) Counselor (primary) Taxonomy 101YA0400X · Licence 169 (MA)
Mental Health Counselor Taxonomy 101YM0800X · Licence 3993 (MA)

Record details

NPI number1639259146
Entity typeIndividual (Type 1)
GenderMale
Credentials LMHC , LADC1
Sole proprietorYes
NPI enumeratedOctober 17, 2006
Last updated in NPPESSeptember 11, 2025

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