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Dennis Stempien, M.D.
NPI 1649304734 · Internal Medicine Physician · Stamford, CT
Dennis Stempien, M.D. is a Internal Medicine Physician provider in Stamford, CT (NPI 1649304734).
Provider details
- NPI number
- 1649304734
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- 016857 (CT)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
Detailed profile(89/100 index)
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
260 Long Ridge Rd
Ge Medical Center
Stamford, CT 06927-1600
Phone: (203) 961-2583
Fax: (203) 602-9580
Street-level locationGet directions
Mailing address
103 Canoe Brook Rd
Trumbull, CT 06611-2101
Registry dates
- Enumerated
- 2007-03-14
- Last updated
- 2007-07-08
Frequently asked questions
- What is Dennis Stempien's NPI number?
- Dennis Stempien's National Provider Identifier (NPI) is 1649304734, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Dennis Stempien's specialty?
- Dennis Stempien is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Dennis Stempien located?
- Dennis Stempien's practice location on file with NPPES is 260 Long Ridge Rd, Stamford, CT 06927-1600.
- What is Dennis Stempien's phone number?
- The practice phone number listed in the NPPES registry for Dennis Stempien is (203) 961-2583.
- Is Dennis Stempien's NPI active?
- Yes — Dennis Stempien's NPI (1649304734) 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.