John Gagnon, PHD
NPI 1679789234 · Marriage & Family Therapist · Stamford, CT
John Gagnon, PHD is a Marriage & Family Therapist provider in Stamford, CT (NPI 1679789234).
Provider details
- NPI number
- 1679789234
- Entity type
- Individual
- Primary specialty
- Marriage & Family TherapistBehavioral Health & Social Service Providers
- Credential
- PHD
- Sex
- Male
- Sole proprietor
- Yes
- License
- 0000112 (CT)
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
19 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
- 2007-05-14
- Last updated
- 2007-07-08
Frequently asked questions
- What is John Gagnon's NPI number?
- John Gagnon's National Provider Identifier (NPI) is 1679789234, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is John Gagnon's specialty?
- John Gagnon is listed in the NPPES registry with a primary specialty of Marriage & Family Therapist (Behavioral Health & Social Service Providers).
- Where is John Gagnon located?
- John Gagnon's practice location on file with NPPES is 233 Oaklawn Ave, Stamford, CT 06905-3518.
- What is John Gagnon's phone number?
- The practice phone number listed in the NPPES registry for John Gagnon is (203) 326-5657.
- Is John Gagnon's NPI active?
- Yes — John Gagnon's NPI (1679789234) 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.