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

William Callahan

Individual provider Addiction (Substance Use Disorder) Counselor · NPI 1649136193

William Callahan is an Addiction (Substance Use Disorder) Counselor in Plymouth, Massachusetts. Registered with an NPI since 2025.

In the registry since
2025

Practice location Address checks out

61 Industrial Park Rd
Plymouth, MA 02360-7246
Phone: (508) 689-5576
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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

Record details

NPI number1649136193
Entity typeIndividual (Type 1)
GenderMale
Sole proprietorNo
NPI enumeratedDecember 29, 2025
Last updated in NPPESDecember 29, 2025
Certification dateDecember 29, 2025
Mailing address61 Industrial Park Rd, Plymouth, MA 02360-7246

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