1. Home
  2. Directory
  3. New Hampshire
  4. Derry
  5. Counselor
  6. NPI Profile

MR. JOHN R COLBY MSW LADC
NPI 1639123011
Counselor - Addiction (Substance Use Disorder) in Derry, NH

Active since May 20, 2006
43 BIRCH STREET, DERRY, NH 03038(603) 434-1577(603) 434-3101 Get Directions Write a Review

NPPES record last updated: July 13, 2026. Verified against the NPPES registry weekly; last sync: September 06, 2026.

About Mr. John R Colby Msw Ladc NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

MR. JOHN R COLBY MSW LADC (NPI 1639123011) is an individual addiction (substance use disorder) provider in Derry, New Hampshire, licensed in New Hampshire (LADC380) and active in the NPI registry since May 2006.

NPPES Registry Identity

NPI1639123011
Entity TypeIndividualMale
Primary Taxonomy101YA0400X
Provider Legal NameMR. JOHN R COLBYCredential: MSW LADC
Location Address43 BIRCH STREETDerry, NH 03038
Mailing Address43 Birch StreetDerry, NH 03038 · (603) 434-1577 · Fax (603) 434-3101
Phone(603) 434-1577
Fax(603) 434-3101
Sole ProprietorNo
Enumeration DateMay 20, 2006
Last NPPES UpdateJuly 13, 2026
✔ NPI 1639123011 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyCounselor · Addiction (Substance Use Disorder)Behavioral Health & Social Service Providers
Taxonomy Code101YA0400X
License✔ Licensed in NH · LADC380
43 BIRCH STREET, Derry, NH 03038
Open in Google Maps ↗

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Ambetter from NH Healthy Families, Anthem Blue Cross and Blue Sheld, Anthem Blue Cross and Blue Shield and more.Insurance ›

Other Providers at the Same Location NPPES 5

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

MR. PETER A REINERTSEN MS
Counselor (Mental Health)
43 BIRCH STREET
DERRY, NH 03038
Rockingham County (603) 434-1577
MR. EDWARD F COONEY MA
Counselor
43 BIRCH STREET
DERRY, NH 03038
Rockingham County (603) 434-1577
CARRIE E WINN MA
Counselor
43 BIRCH STREET
DERRY, NH 03038
Rockingham County (603) 434-1577
HOLLY C SALACH-LAFERTE MCMHC
Counselor
43 BIRCH STREET
DERRY, NH 03038
Rockingham County (603) 434-1577
MARSHA MENTER LCMHC
Counselor (Mental Health)
43 BIRCH STREET
DERRY, NH 03038
Rockingham County (603) 434-1577

Frequently Asked Questions NPPES & CMS

Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.

What is John Colby's NPI number?

The NPI number for John Colby is 1639123011. It was assigned to this individual provider in the NPPES registry on May 20, 2006.

Where is John Colby located?

John Colby practices at 43 Birch Street, Derry, NH 03038. The listed phone number is (603) 434-1577.

What is John Colby's specialty?

The primary specialty registered for this NPI is Counselor, specializing in Addiction (Substance Use Disorder), with taxonomy code 101YA0400X.

What insurance does John Colby accept?

Health plans from Ambetter from NH Healthy Families, Anthem Blue Cross and Blue Sheld, Anthem Blue Cross and Blue Shield, Harvard Pilgrim Health Care and Providence Health Plan and 1 other insurer list John Colby as in-network in at least one marketplace plan. Coverage varies by plan and year; verify with the insurer or the provider before a visit.

When was this NPI record last updated?

The NPPES record for John Colby was last updated on July 13, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 2 months ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.