David Fiellin, MD
NPI 1194700666 · Internal Medicine Physician · New Haven, CT
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
David Fiellin, MD is a Internal Medicine Physician provider in New Haven, CT (NPI 1194700666).
Provider details
- NPI number
- 1194700666
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- 033601 (CT)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
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.
Practice location
Mailing address
Registry dates
- Enumerated
- 2005-12-07
- Last updated
- 2013-02-06
Frequently asked questions
- What is David Fiellin's NPI number?
- David Fiellin's National Provider Identifier (NPI) is 1194700666, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is David Fiellin's specialty?
- David Fiellin is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is David Fiellin located?
- David Fiellin's practice location on file with NPPES is 789 Howard Ave, New Haven, CT 06519-1304.
- What is David Fiellin's phone number?
- The practice phone number listed in the NPPES registry for David Fiellin is (203) 688-2471.
- Does David Fiellin accept Medicare?
- David Fiellin is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is David Fiellin's NPI active?
- Yes — David Fiellin's NPI (1194700666) is active in the NPPES registry as of the last update on 2013-02-06.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.