John Colby, MSW LADC
NPI 1639123011 · Addiction (Substance Use Disorder) Counselor · Derry, NH
John Colby, MSW LADC is a Addiction (Substance Use Disorder) Counselor provider in Derry, NH (NPI 1639123011).
Provider details
- NPI number
- 1639123011
- Entity type
- Individual
- Primary specialty
- Addiction (Substance Use Disorder) CounselorBehavioral Health & Social Service Providers
- Credential
- MSW LADC
- Sex
- Male
- License
- LADC380 (NH)
Specialties & taxonomies
Behavioral Health & Social Service Providers
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
20 yrs in NPPES registry
- Profile completeness38% of score
100% of core fields populated
- Practice footprint23% of score
1 documented practice location
Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-05-20
- Last updated
- 2007-07-08
Frequently asked questions
- What is John Colby's NPI number?
- John Colby's National Provider Identifier (NPI) is 1639123011, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is John Colby's specialty?
- John Colby is listed in the NPPES registry with a primary specialty of Addiction (Substance Use Disorder) Counselor (Behavioral Health & Social Service Providers).
- Where is John Colby located?
- John Colby's practice location on file with NPPES is 43 Birch Street, Derry, NH 03038.
- What is John Colby's phone number?
- The practice phone number listed in the NPPES registry for John Colby is (603) 434-1577.
- Is John Colby's NPI active?
- Yes — John Colby's NPI (1639123011) is active in the NPPES registry as of the last update on 2007-07-08.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.