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DR. MARVIN DEN M.D.
NPI 1659363356
Internal Medicine in Norwalk, CT

Active since August 18, 2005
40 CROSS ST, 4TH FL, NORWALK, CT 06851(203) 845-4800(203) 845-4873 Get Directions Write a Review

NPPES record last updated: March 26, 2018. Verified against the NPPES registry weekly; last sync: August 02, 2026.

Record update history: Mar 26, 2018, Mar 17, 2018, Nov 18, 2016 (3 updates tracked since 2016).

About Dr. Marvin Den M.d. NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

DR. MARVIN DEN M.D. (NPI 1659363356) is an individual internal medicine provider in Norwalk, Connecticut, licensed in Connecticut (022759) and active in the NPI registry since August 2005.

NPPES Registry Identity

NPI1659363356
Entity TypeIndividualMale
Primary Taxonomy207R00000X
Provider Legal NameDR. MARVIN DENCredential: M.D.
Location Address40 CROSS ST, 4TH FLNorwalk, CT 06851-4647
Mailing Address2700 Westchester AvePurchase, NY 10577-2547 · (914) 607-5730 · Fax (914) 457-1195
Phone(203) 845-4800
Fax(203) 845-4873
Sole ProprietorNo
Enumeration DateAugust 18, 2005
Last NPPES UpdateMarch 26, 20183 updates tracked since enumeration
✔ NPI 1659363356 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtyInternal MedicineAllopathic & Osteopathic Physicians
Taxonomy Code207R00000X
License✔ Licensed in CT · 022759
Definition
A physician who provides long-term, comprehensive care in the office and the hospital, managing both common and complex illness of adolescents, adults and the elderly. Internists are trained in the diagnosis and treatment of cancer, infections and diseases affecting the heart, blood, kidneys, joints and digestive, respiratory and vascular systems. They are also trained in the essentials of primary care internal medicine, which incorporates an understanding of disease prevention, wellness, substance abuse, mental health and effective treatment of common problems of the eyes, ears, skin, nervous system and reproductive organs.
Also ListedAllergy & ImmunologyTaxonomy 207K00000X · License 022759 (CT)
40 CROSS ST, Norwalk, CT 06851
Open in Google Maps ↗

Other Identifiers 1

Medicaid001227594CT

Other Providers at the Same Location NPPES 20

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

JENNIFER I MOORE MD
Pediatrics
40 CROSS ST, SUITE 300
NORWALK, CT 06851
Western Connecticut Planning Region (203) 229-2000
MS. PAULA LEVY LMFT
Marriage & Family Therapist
40 CROSS ST, SUITE 240
NORWALK, CT 06851
Western Connecticut Planning Region (203) 761-9587
COURTNEY LYDDY DPT
Physical Therapist
40 CROSS ST, REHABILITATION SERVICES OF NORWALK HOSPITAL
NORWALK, CT 06851
Western Connecticut Planning Region (203) 840-3170
JEANNE M MARCONI MD
Pediatrics
40 CROSS ST, SUITE 300
NORWALK, CT 06851
Western Connecticut Planning Region (203) 229-2029
RONALD STEVEN KAHAN MD
Dermatology
40 CROSS ST, SUITE 340
NORWALK, CT 06851
Western Connecticut Planning Region (203) 847-1500
JOEL NOEL RAJENDRA SINGH MD
Internal Medicine (Cardiovascular Disease)
40 CROSS ST
NORWALK, CT 06851
Western Connecticut Planning Region (607) 621-7293
DR. KESAV G. NAIR M.D.
Internal Medicine (Medical Oncology)
40 CROSS ST, 4TH FL
NORWALK, CT 06851
Western Connecticut Planning Region (203) 845-4898
RALPH KIRMSER M.D.
Internal Medicine (Cardiovascular Disease)
40 CROSS ST
NORWALK, CT 06851
Western Connecticut Planning Region (203) 845-2160

Frequently Asked Questions NPPES & CMS

Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.

What is Marvin Den's NPI number?

The NPI number for Marvin Den is 1659363356. It was assigned to this individual provider in the NPPES registry on August 18, 2005.

Where is Marvin Den located?

Marvin Den practices at 40 Cross St 4th Fl, Norwalk, CT 06851. The listed phone number is (203) 845-4800.

What is Marvin Den's specialty?

The primary specialty registered for this NPI is Internal Medicine with taxonomy code 207R00000X.

When was this NPI record last updated?

The NPPES record for Marvin Den was last updated on March 26, 2018. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 8 years ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.