DR. MARVIN DEN (M.D.) – Internal Medicine Physician, NPI 1659363356

DR. MARVIN DEN (M.D.) is a healthcare provider. based in Norwalk, Connecticut. specializing in Internal Medicine Physician. They hold the professional credentials M.D.. They hold a License No. 022759 (CT). The NPI Number for DR. MARVIN DEN (M.D.) is 1659363356

Main info

Male
50 Years Of Experience
Accepts Medicare Assignment
Name
DR. MARVIN DEN (M.D.)
NPI
1659363356
Phone
(203) 845-4800
Address
40 CROSS ST
Enumeration Date
18 August 2005
Last Update Date
26 March 2018

Doctor Profile

Medical School Name
NEW YORK UNIVERSITY SCHOOL OF MEDICINE
Secondary Phone
2038454800
Graduation Year
1976 (50 years ago)
PAC ID
5597854679
Group Practice PAC ID
6406752963
Professional Enrollment ID
I20100526000929
Data current as of
19 May 2026

Profile Insights

NPPES metrics only — not quality of care.

Methodology
Experience59
Completeness75
Years active:20State licenses:1Digital endpointsOther names

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Provider Addresses for DR. MARVIN DEN (M.D.)

  • 40, Cross Street, Norwalk, Fairfield County, Connecticut, 06851, United States

    4TH FL

    NORWALK, CT 068514647

    Phone: (203) 845-4800

    Fax: (203) 845-4873

    Type: Location

  • 2700 WESTCHESTER AVE

    PURCHASE, NY 105772547

    Phone: (914) 607-5730

    Fax: (914) 457-1195

    Type: Mailing

NPPES updates history

No NPPES updates recorded for this provider.

Prescription Activity

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Open Payments (CMS)

No Open Payments data available for this provider.

This can happen when there are no reportable CMS Open Payments records.

Medicare Enrollment & Revalidation

Source: CMS public data · Not endorsed by CMS ·

Educational use only—not medical, billing, or legal advice.

No Medicare enrollment or revalidation data available for this provider in our database.

Prepare CMS-855 application → · Look up this NPI in PECOS → · Verify on CMS PECOS

Medicare Utilization (FFS)

Source: CMS public data · Not endorsed by CMS · Beneficiary counts under 11 are suppressed in source data ·

Educational use only—not medical, billing, or legal advice.

No Medicare fee-for-service utilization data available for this provider in our database.

Insurance plans in this area (ZIP 06851)

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Provider's Procedures

DR. MARVIN DEN (M.D.) performs procedures in Internal Medicine Physician. See the list of HCPCS codes below.
SpecialtyPractice State
HCPCS Code
Description
Service Count
Beneficiary Count
INTERNAL MEDICINECT94060Measurement and graphic recording of the amount and speed of breathed air, before and following medication administration1615

Group practice members

Group practice members are other physicians who share the same Group Practice PAC ID with this doctor. When doctors form a group practice and register in PECOS as a single entity, they receive a shared identification number. This table lists all providers in the same group practice.
PAC ID: 6406752963View full group profile
NameSpecialtyState
Qualified AudiologistNY
Diagnostic RadiologyNY
Physician AssistantNY
-CT
-NY
O B S T E T R I C S/ G Y N E C O L O G YNY
A N E S T H E S I O L O G YNY
Physician AssistantCT
O B S T E T R I C S/ G Y N E C O L O G YNY
-CT

Reviews

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Frequently asked questions

Where can patients find DR. MARVIN DEN (M.D.)'s NPI?
You can confirm DR. MARVIN DEN (M.D.) with NPI 1659363356; it appears in the national provider directory.
Is DR. MARVIN DEN (M.D.) active in the national directory?
DR. MARVIN DEN (M.D.)'s public NPI profile is in an active state.
What does DR. MARVIN DEN (M.D.) treat or focus on?
Patients typically see DR. MARVIN DEN (M.D.) under the specialty Internal Medicine Physician. Clinical services aligned with this taxonomy classification.
What location metadata exists for DR. MARVIN DEN (M.D.)?
The page summarizes Norwalk, Connecticut for DR. MARVIN DEN (M.D.); expand the address list for detail.
Is DR. MARVIN DEN (M.D.) a real provider?
This page reflects official NPPES data for NPI 1659363356. Always confirm identity and privileges with the practice and licensing boards.

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