Marvin Den, M.D.
NPI 1659363356 · Internal Medicine Physician · Norwalk, CT
Marvin Den, M.D. is a Internal Medicine Physician provider in Norwalk, CT (NPI 1659363356).
Provider details
- NPI number
- 1659363356
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- 022759 (CT)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
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
- 2005-08-18
- Last updated
- 2018-03-26
Frequently asked questions
- What is Marvin Den's NPI number?
- Marvin Den's National Provider Identifier (NPI) is 1659363356, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Marvin Den's specialty?
- Marvin Den is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Marvin Den located?
- Marvin Den's practice location on file with NPPES is 40 Cross St, Norwalk, CT 06851-4647.
- What is Marvin Den's phone number?
- The practice phone number listed in the NPPES registry for Marvin Den is (203) 845-4800.
- Is Marvin Den's NPI active?
- Yes — Marvin Den's NPI (1659363356) is active in the NPPES registry as of the last update on 2018-03-26.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.