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John Madsen, M.D.
NPI 1144286667 · Gastroenterology Physician · New London, CT
John Madsen, M.D. is a Gastroenterology Physician provider in New London, CT (NPI 1144286667).
Provider details
- NPI number
- 1144286667
- Entity type
- Individual
- Primary specialty
- Gastroenterology PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- 016619 (CT)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
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.
Practice location
234a Bank St
New London, CT 06320-6054
Phone: (860) 442-0290
Fax: (860) 442-2136
Street-level locationGet directions
Mailing address
234a Bank St
New London, CT 06320-6054
Registry dates
- Enumerated
- 2006-04-24
- Last updated
- 2012-12-20
Frequently asked questions
- What is John Madsen's NPI number?
- John Madsen's National Provider Identifier (NPI) is 1144286667, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is John Madsen's specialty?
- John Madsen is listed in the NPPES registry with a primary specialty of Gastroenterology Physician (Allopathic & Osteopathic Physicians).
- Where is John Madsen located?
- John Madsen's practice location on file with NPPES is 234a Bank St, New London, CT 06320-6054.
- What is John Madsen's phone number?
- The practice phone number listed in the NPPES registry for John Madsen is (860) 442-0290.
- Is John Madsen's NPI active?
- Yes — John Madsen's NPI (1144286667) is active in the NPPES registry as of the last update on 2012-12-20.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.