Recently Updated NPI Information — some details in this NPI profile have been updated in the NPI registry within the last 30 days.

DR. MARK CWERN MD
NPI 1780661769
Internal Medicine - Gastroenterology in Nyc, NY

Q: What is Mark Cwern's NPI number?

The NPI number for Mark Cwern is 1780661769. It was assigned to this individual provider in the NPPES registry on December 29, 2005.

Q: What is Mark Cwern's specialty?

The primary specialty registered for this NPI is Internal Medicine, specializing in Gastroenterology, with taxonomy code 207RG0100X.

Q: When was this NPI record last updated?

The NPPES record for Mark Cwern was last updated on July 13, 2026. NPI Profile syncs with the weekly NPPES data releases published by CMS.

Active since December 29, 2005PECOS Enrolled

305 E 55TH ST, NYC, NY 10022(212) 751-9714(212) 832-1821 Get Directions Write a Review

NPPES record last updated: July 13, 2026. Verified against the NPPES registry weekly; last sync: July 19, 2026.

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About Dr. Mark Cwern Md NPPES

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

DR. MARK CWERN MD (NPI 1780661769) is an individual gastroenterology provider in Nyc, New York, licensed in New York (125031) and active in the NPI registry since December 2005. He is enrolled in Medicare PECOS.

NPPES Registry Identity

NPI1780661769

Entity TypeIndividualMale

Primary Taxonomy207RG0100X

Provider Legal NameDR. MARK CWERNCredential: MD

Location Address305 E 55TH STNyc, NY 10022

Mailing Address305 E 55th StNyc, NY 10022 · (212) 751-9714 · Fax (212) 832-1821

Phone(212) 751-9714

Fax(212) 832-1821

Sole ProprietorNo

Enumeration DateDecember 29, 2005

Last NPPES UpdateJuly 13, 2026

✔ NPI 1780661769 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyInternal Medicine · GastroenterologyAllopathic & Osteopathic Physicians

Taxonomy Code207RG0100X

License✔ Licensed in NY · 125031

Definition

An internist who specializes in diagnosis and treatment of diseases of the digestive organs including the stomach, bowels, liver and gallbladder. This specialist treats conditions such as abdominal pain, ulcers, diarrhea, cancer and jaundice and performs complex diagnostic and therapeutic procedures using endoscopes to visualize internal organs.

305 E 55TH ST, Nyc, NY 10022

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Other Identifiers 1

Medicaid00741662NY

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, and ordering and referring status from the CMS PECOS system.

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Dr. Mark Cwern Md is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

Eligible to Order & Refer✔ Part B Labs & Imaging✔ Durable Medical Equipment✔ Home Health Agency✔ Power Mobility DevicesPer the CMS Ordering and Referring file. Eligibility means Medicare pays claims that this provider orders or refers for these categories.

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 10022 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.

New Patient

$150.24 typical visit price

range $65.69 – $198.19

Typical copayment $37.56 (range $16.42 – $49.54)

Most-billed visit code 99204

Established Patient

$114.88 typical visit price

range $21.20 – $160.66

Typical copayment $28.72 (range $5.30 – $40.16)

Most-billed visit code 99214

Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.