DR. MARK DAM (M.D) – Internal Medicine Physician, NPI 1720005507

DR. MARK DAM (M.D) is a healthcare provider. based in Darien, Connecticut. specializing in Internal Medicine Physician. They hold the professional credentials M.D. They hold a License No. 033665 (CT). The NPI Number for DR. MARK DAM (M.D) is 1720005507

Main info

Male
Sole Proprietor
36 Years Of Experience
Accepts Medicare Assignment
Name
DR. MARK DAM (M.D)
NPI
1720005507
Phone
(203) 662-8900
Address
40 HEIGHTS RD
Enumeration Date
16 July 2006
Last Update Date
5 November 2021

Doctor Profile

Medical School Name
OTHER
Secondary Phone
7864088502
Graduation Year
1990 (36 years ago)
PAC ID
8426052622
Group Practice PAC ID
2567702517
Professional Enrollment ID
I20060830000465
Data current as of
19 May 2026

Profile Insights

NPPES metrics only — not quality of care.

Methodology
Experience52
Completeness75
Years active:19State licenses:1Digital endpointsOther names

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Provider Addresses for DR. MARK DAM (M.D)

  • 40, Heights Road, Noroton, Darien, Fairfield County, Connecticut, 06820, United States

    DARIEN, CT 068204132

    Phone: (203) 662-8900

    Fax: (203) 662-8906

    Mailing address matches the actual address.

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.

PECOS enrollment status

Participating (accepts Medicare assignment)

Enrollment effective: 2006-08-30

PECOS data refreshed: 2026-05-27

Medicare revalidation (CMS due date list)

Due date not assigned yet

CMS is tracking this Medicare enrollment for revalidation, but has not published a due date.

Enrollment records

1

Earliest due date

Not assigned (TBD)

CMS data updated

2026-06-01

Revalidation progress

  1. Medicare enrolled
  2. On CMS revalidation list
  3. Due date assigned
  4. Revalidate in PECOS

CMS enrollment records

Enrollment IDTypeSpecialtyStateDue date
I20060830000465IInternal MedicineCTTBD

What to do next

  • No action required while the due date shows TBD.
  • Check the CMS Revalidation Lookup Tool periodically — CMS updates the list about every 60 days.
  • Do not submit a revalidation application in PECOS until CMS publishes a concrete due date.

Verify on CMS Revalidation Lookup Tool

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 06820)

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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: 2567702517View full group profile

Reviews

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Frequently asked questions

Can I use this page to confirm DR. MARK DAM (M.D)'s NPI?
Yes. DR. MARK DAM (M.D) is listed with NPI 1720005507 in the public NPI dataset.
Does the file indicate DR. MARK DAM (M.D) is practicing under active NPI?
Directory data currently reports DR. MARK DAM (M.D) as active.
What is DR. MARK DAM (M.D) best known for clinically?
Directory data describes DR. MARK DAM (M.D) with Internal Medicine Physician. Clinical services aligned with this taxonomy classification.
Where should I expect DR. MARK DAM (M.D) on a map?
Expect Darien, Connecticut as a primary anchor for DR. MARK DAM (M.D) unless the record lists multiple sites.
Why does DR. MARK DAM (M.D) have multiple addresses?
2 practice locations appear in the available data. Multiple addresses are common for hospital privileges, telehealth, or multi-site groups.

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