What is John Widlak's NPI number?

John Widlak's National Provider Identifier (NPI) is 1740379635, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.

What is John Widlak's specialty?

John Widlak is listed in the NPPES registry with a primary specialty of General Practice Dentistry (Dental Providers).

Where is John Widlak located?

John Widlak's practice location on file with NPPES is 163 Ledgewood Rd, Groton, CT 06340-6611.

What is John Widlak's phone number?

The practice phone number listed in the NPPES registry for John Widlak is (505) 491-7009.

Is John Widlak's NPI active?

Yes — John Widlak's NPI (1740379635) is active in the NPPES registry as of the last update on 2007-07-08.

IndividualActive

John Widlak, D.M.D.

NPI 1740379635 · General Practice Dentistry · Groton, CT

John Widlak, D.M.D. is a General Practice Dentistry provider in Groton, CT (NPI 1740379635).

Provider details

NPI number: 1740379635
Entity type: Individual
Primary specialty: General Practice DentistryDental Providers
Credential: D.M.D.
Sex: Male
Sole proprietor: Yes
License: 008204 (CT)

Practice location

163 Ledgewood Rd

Apt 412

Groton, CT 06340-6611

Phone: (505) 491-7009

Street-level locationGet directions

More CT providers

Mailing address

1 Wahoo Drive

Groton, CT 06349-5600

Specialties & taxonomies

General Practice DentistryPrimary1223G0001XLicense 008204 (CT)
Dental Providers

Profile Score

Detailed profile(91/100 index)

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.

Enumerated: 2006-10-11
Last updated: 2007-07-08

Frequently asked questions

What is John Widlak's NPI number?: John Widlak's National Provider Identifier (NPI) is 1740379635, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
What is John Widlak's specialty?: John Widlak is listed in the NPPES registry with a primary specialty of General Practice Dentistry (Dental Providers).
Where is John Widlak located?: John Widlak's practice location on file with NPPES is 163 Ledgewood Rd, Groton, CT 06340-6611.
What is John Widlak's phone number?: The practice phone number listed in the NPPES registry for John Widlak is (505) 491-7009.
Is John Widlak's NPI active?: Yes — John Widlak's NPI (1740379635) 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.

Provider details

Practice location

Mailing address

Specialties & taxonomies

Profile Score

Registry dates

Frequently asked questions

Specialties & taxonomies

Profile Score

Frequently asked questions