Mark Cwern, MD
Gastroenterology Physician · Nyc, NY
Mark Cwern, MD is a gastroenterology physician with a practice address in Nyc, New York, and NPI 1780661769, issued on Dec 29, 2005. Check the license (New York 125031, as entered in NPPES) on the NYS Education Department, Office of the Professions; the Medicare figures below come from public CMS files.
- Name
- Mark Cwern
- Credential
- MD
- Primary taxonomy
- Gastroenterology Physician 207RG0100X
- License number
- 125031 NY
Self-reported in NPPES; status is on the state search - Practice location
- 305 E 55TH St, Nyc, NY 10022
- Phone
- (212) 751-9714
- Enumerated
- Dec 29, 2005
- Record last updated
- Jul 13, 2026
- Fax
- (212) 832-1821
- Medicaid ID
- 00741662 NY
- Entity
- Type 1 · individual
8 nearest gastroenterology physician records → All 1,797 in New York → Look up another NPI →
Verify Mark Cwern in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersNYS Education Department, Office of the Professions
Search for license 125031Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
98% fewer Medicare Part D claims than the average gastroenterology physician in 2024
18 Medicare Part D claims, against an average of 811 among the 16,445 providers of this specialty who prescribed in Part D. Brand-name drugs were 0% of claims.
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
Mark Cwern among 1,797 gastroenterology physician records in New York
Mark Cwern, MD is one of 1,797 gastroenterology physician records with a practice address in New York. 88% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2005, is newer than 0% of them.
- NPI issued2005 · 0% of these records are older, 85% newer
- In a Medicare fileYes · 88% of these records are
- In the CMS Doctors and Clinicians fileNo · 77% of these records are
- Record last updated2026 · 65% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RG0100X and a New York practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
2 gastroenterology physician records list a practice address in Nyc
They are 2 of the 119 NPPES records with a practice address in Nyc, and 1,797 gastroenterology physician records in New York.
All 1,797 in New York → Every provider in Nyc → Gastroenterology Physician nationwide →
The 8 gastroenterology physician records with the nearest ZIP codes
- Robert Cooper, M.D.New York, NY 100221396783627
- Angie Eng, M.D.New York, NY 100221174555262
- Joseph Felder, M.D.New York, NY 100221174522569
- Paul Glassman, M.D.New York, NY 100221629120886
- Edward Goldberg, M.D.New York, NY 100221235167768
- Dov Grant, M.D.New York, NY 100221164501219
- Albert Harary, MDNew York, NY 100221437243748
- Lawrence Herman, M.D.New York, NY 100221609955202
Common questions
What is Mark Cwern, MD's NPI number?
Mark Cwern, MD's National Provider Identifier (NPI) is 1780661769, issued on Dec 29, 2005. An NPI identifies a provider in billing; it is not a license.
Where is Mark Cwern, MD located?
The NPPES record lists a practice address at 305 E 55TH St, Nyc, NY, 10022. Phone: (212) 751-9714. Providers update this record themselves, so call before visiting.
How can I verify Mark Cwern, MD's license?
NPPES lists New York license number 125031, as entered by the provider. Search the NYS Education Department, Office of the Professions at https://www.op.nysed.gov/services/verifications/online-verification-searches. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Mark Cwern, MD prescribe under Medicare Part D?
In 2024, Mark Cwern, MD had 18 Medicare Part D claims; the average among gastroenterology physician prescribers was 811. Part D covers Medicare prescriptions only.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.