Thomas Duffy, O.D.
NPI 1063503613 · Optometrist · Ansonia, CT
Enrolled with Medicare as Practitioner - Optometry · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Thomas Duffy, O.D. is a Optometrist provider in Ansonia, CT (NPI 1063503613).
Provider details
- NPI number
- 1063503613
- Entity type
- Individual
- Primary specialty
- OptometristEye and Vision Services Providers
- Credential
- O.D.
- Sex
- Male
- Sole proprietor
- Yes
- License
- 002121 (CT)
Specialties & taxonomies
Eye and Vision Services 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
- 2006-09-27
- Last updated
- 2007-07-08
Frequently asked questions
- What is Thomas Duffy's NPI number?
- Thomas Duffy's National Provider Identifier (NPI) is 1063503613, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Thomas Duffy's specialty?
- Thomas Duffy is listed in the NPPES registry with a primary specialty of Optometrist (Eye and Vision Services Providers).
- Where is Thomas Duffy located?
- Thomas Duffy's practice location on file with NPPES is 336 Main St, Ansonia, CT 06401-2303.
- What is Thomas Duffy's phone number?
- The practice phone number listed in the NPPES registry for Thomas Duffy is (203) 732-3937.
- Does Thomas Duffy accept Medicare?
- Thomas Duffy is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Thomas Duffy's NPI active?
- Yes — Thomas Duffy's NPI (1063503613) 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.