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

Mr. John D Leavitt, MSW

Individual provider Addiction (Substance Use Disorder) Counselor · NPI 1972675320

Mr. John D Leavitt, MSW is an Addiction (Substance Use Disorder) Counselor in South Boston, Massachusetts. Practices as a sole proprietor. Licensed in Massachusetts.

Licensed in
MA
In the registry since
2006
What do these letters mean?
MSW — Master of Social Work
The graduate degree in social work.

See every abbreviation used in this directory →

Practice location Address checks out

210 Old Colony Ave
South Boston, MA 02127-2413
Phone: (617) 268-5000
Fax: (617) 268-5008
Show map & directions

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

Specialties & licences

Addiction (Substance Use Disorder) Counselor (primary) Taxonomy 101YA0400X · Licence 1028970 (MA)

Record details

NPI number1972675320
Entity typeIndividual (Type 1)
GenderMale
Credentials MSW
Sole proprietorYes
NPI enumeratedNovember 14, 2006
Last updated in NPPESJanuary 23, 2023
Certification dateJanuary 23, 2023
Mailing address210 Old Colony Ave, South Boston, MA 02127-2413

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