John Thayer, MD
NPI 1942293956 · Thoracic Surgery (Cardiothoracic Vascular Surgery) Physician · Hartford, CT
Enrolled with Medicare as Practitioner - Thoracic Surgery · source: CMS PECOS Public Provider Enrollment (2026.04.01)
John Thayer, MD is a Thoracic Surgery (Cardiothoracic Vascular Surgery) Physician provider in Hartford, CT (NPI 1942293956).
Provider details
- NPI number
- 1942293956
- Entity type
- Individual
- Primary specialty
- Thoracic Surgery (Cardiothoracic Vascular Surgery) PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- 028081 (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
- 2005-08-24
- Last updated
- 2009-03-30
Frequently asked questions
- What is John Thayer's NPI number?
- John Thayer's National Provider Identifier (NPI) is 1942293956, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is John Thayer's specialty?
- John Thayer is listed in the NPPES registry with a primary specialty of Thoracic Surgery (Cardiothoracic Vascular Surgery) Physician (Allopathic & Osteopathic Physicians).
- Where is John Thayer located?
- John Thayer's practice location on file with NPPES is 1000 Asylum Ave, Hartford, CT 06105-1770.
- What is John Thayer's phone number?
- The practice phone number listed in the NPPES registry for John Thayer is (860) 714-1094.
- Does John Thayer accept Medicare?
- John Thayer is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is John Thayer's NPI active?
- Yes — John Thayer's NPI (1942293956) is active in the NPPES registry as of the last update on 2009-03-30.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.