What is Mark Doublet's NPI number?

Mark Doublet's National Provider Identifier (NPI) is 1659814077, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.

What is Mark Doublet's specialty?

Mark Doublet is listed in the NPPES registry with a primary specialty of Registered Dietitian (Dietary & Nutritional Service Providers).

Where is Mark Doublet located?

Mark Doublet's practice location on file with NPPES is 75 N Country Rd, Port Jefferson, NY 11777-2119.

What is Mark Doublet's phone number?

The practice phone number listed in the NPPES registry for Mark Doublet is (631) 686-2505.

Is Mark Doublet's NPI active?

Yes — Mark Doublet's NPI (1659814077) is active in the NPPES registry as of the last update on 2016-12-03.

IndividualActive

Mark Doublet, R.D., C.D.E.

NPI 1659814077 · Registered Dietitian · Port Jefferson, NY

Mark Doublet, R.D., C.D.E. is a Registered Dietitian provider in Port Jefferson, NY (NPI 1659814077).

Provider details

NPI number: 1659814077
Entity type: Individual
Primary specialty: Registered DietitianDietary & Nutritional Service Providers
Credential: R.D., C.D.E.
Sex: Male
Sole proprietor: Yes
License: 1005065 (NY)

Specialties & taxonomies

Registered DietitianPrimary133V00000XLicense 1005065 (NY)
Dietary & Nutritional Service Providers

Profile Score

Established profile(71/100 index)

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

Registry tenure38% of score
9 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

75 N Country Rd

Port Jefferson, NY 11777-2119

Phone: (631) 686-2505

Approximate (ZIP-level) locationGet directions

More NY providers

Mailing address

215 Westview Ave

Deer Park, NY 11729-6404

Enumerated: 2016-12-03
Last updated: 2016-12-03

Frequently asked questions

What is Mark Doublet's NPI number?: Mark Doublet's National Provider Identifier (NPI) is 1659814077, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
What is Mark Doublet's specialty?: Mark Doublet is listed in the NPPES registry with a primary specialty of Registered Dietitian (Dietary & Nutritional Service Providers).
Where is Mark Doublet located?: Mark Doublet's practice location on file with NPPES is 75 N Country Rd, Port Jefferson, NY 11777-2119.
What is Mark Doublet's phone number?: The practice phone number listed in the NPPES registry for Mark Doublet is (631) 686-2505.
Is Mark Doublet's NPI active?: Yes — Mark Doublet's NPI (1659814077) is active in the NPPES registry as of the last update on 2016-12-03.

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