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

Mr. John R Colby, MSWLADC

Individual provider Addiction (Substance Use Disorder) Counselor · NPI 1639123011

Mr. John R Colby, MSWLADC is an Addiction (Substance Use Disorder) Counselor in Derry, New Hampshire. Licensed in New Hampshire. Registered with an NPI since 2006.

Licensed in
NH
In the registry since
2006

Practice location Address checks out

43 Birch St
Derry, NH 03038
Phone: (603) 434-1577
Fax: (603) 434-3101
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 LADC380 (NH)

Record details

NPI number1639123011
Entity typeIndividual (Type 1)
GenderMale
Credentials MSWLADC
Sole proprietorNo
NPI enumeratedMay 20, 2006
Last updated in NPPESJuly 13, 2026

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