What is Joseph Demers's NPI number?

Joseph Demers's National Provider Identifier (NPI) is 1871139196, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.

What is Joseph Demers's specialty?

Joseph Demers is listed in the NPPES registry with a primary specialty of Psychologist (Behavioral Health & Social Service Providers).

Where is Joseph Demers located?

Joseph Demers's practice location on file with NPPES is 330 Post Rd, Darien, CT 06820-3600.

What is Joseph Demers's phone number?

The practice phone number listed in the NPPES registry for Joseph Demers is (203) 202-7654.

Is Joseph Demers's NPI active?

Yes — Joseph Demers's NPI (1871139196) is active in the NPPES registry as of the last update on 2020-10-13.

IndividualActive

Joseph Demers, PHD

NPI 1871139196 · Psychologist · Darien, CT

Joseph Demers, PHD is a Psychologist provider in Darien, CT (NPI 1871139196).

Provider details

NPI number: 1871139196
Entity type: Individual
Primary specialty: PsychologistBehavioral Health & Social Service Providers
Credential: PHD
Sex: Male
Sole proprietor: Yes
License: 3893 (CT)

Practice location

330 Post Rd

Darien, CT 06820-3600

Phone: (203) 202-7654

Fax: (203) 202-7655

Street-level locationGet directions

More CT providers

Mailing address

330 Post Rd

Darien, CT 06820-3600

Specialties & taxonomies

PsychologistPrimary103T00000XLicense 3893 (CT)
Behavioral Health & Social Service Providers

Profile Score

Established profile(66/100 index)

A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.

Registry tenure38% of score
6 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.

Enumerated: 2019-11-21
Last updated: 2020-10-13
Certified: 2020-10-13

Frequently asked questions

What is Joseph Demers's NPI number?: Joseph Demers's National Provider Identifier (NPI) is 1871139196, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
What is Joseph Demers's specialty?: Joseph Demers is listed in the NPPES registry with a primary specialty of Psychologist (Behavioral Health & Social Service Providers).
Where is Joseph Demers located?: Joseph Demers's practice location on file with NPPES is 330 Post Rd, Darien, CT 06820-3600.
What is Joseph Demers's phone number?: The practice phone number listed in the NPPES registry for Joseph Demers is (203) 202-7654.
Is Joseph Demers's NPI active?: Yes — Joseph Demers's NPI (1871139196) is active in the NPPES registry as of the last update on 2020-10-13.

Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.

Provider details

Practice location

Mailing address

Specialties & taxonomies

Profile Score

Registry dates

Frequently asked questions

Specialties & taxonomies

Profile Score

Frequently asked questions