Mark Chu, DO
Gastroenterology Physician · New York, NY
Mark Chu, DO is a gastroenterology physician with a practice address in New York, New York, and NPI 1588755565, issued on Sep 27, 2006. Check the license (New York 196705, as entered in NPPES) on the NYS Education Department, Office of the Professions; the Medicare figures below come from public CMS files.
- Name
- Mark Chu
- Credential
- DO
- Primary taxonomy
- Gastroenterology Physician 207RG0100X
- License number
- 196705 NY
Self-reported in NPPES; status is on the state search - Practice location
- 13-17 Elizabeth Street, New York, NY 10013
- Phone
- (212) 219-8031
- Enumerated
- Sep 27, 2006
- Record last updated
- Jul 8, 2007 (not updated in 19 years: call before relying on the address or phone)
- Fax
- (212) 219-3903
- Medicaid ID
- 01987824 NY
- Medicare enrollment
- Enrolled (PECOS I20040728001034); may accept Medicare assignment
- Entity
- Type 1 · individual
8 nearest gastroenterology physician records → All 1,797 in New York → Look up another NPI →
Also registered at 13-17 Elizabeth Street
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Alexander Chan, M.D.Internal Medicine Physician1568427243
- Helen Lau, M.D.Pediatrics Physician1255480042
Verify Mark Chu 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 196705Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
28% more Medicare Part D claims than the average gastroenterology physician in 2024
1,040 Medicare Part D claims for 490 beneficiaries, against an average of 811 among the 16,445 providers of this specialty who prescribed in Part D. Brand-name drugs were 11% of claims.
Most prescribed
- Omeprazole421 claims
- Sod Sulf-Potass Sulf-Mag Sulf216 claims
- Gavilyte-G50 claims
- Pantoprazole Sodium30 claims
- Linzess29 claims
- Famotidine28 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.
Industry payments in 2024: $1,672.36
62 payments; by number, the most common kind was food and beverage; the largest payer was Abbvie Inc. The 13,350 providers of this specialty with any payment received $5,015.95 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
Bills Medicare through one group practice
- Downtown Gastroenterology Associates PCNew York, NY
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Mark Chu among 1,797 gastroenterology physician records in New York
Mark Chu, DO 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 2006, is newer than 15% of them.
- NPI issued2006 · 15% of these records are older, 44% newer
- In a Medicare fileYes · 88% of these records are
- In the CMS Doctors and Clinicians fileYes · 77% of these records are
- Graduated1993 · median 1999 among the 1,378 with a school on file
- Record last updated2007 · 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).
Gastroenterology Physician providers in New York
There are 1,797 gastroenterology physician records in New York.
All 1,797 in New York → Every provider in New York → Gastroenterology Physician nationwide →
The 8 gastroenterology physician records with the nearest ZIP codes
- Anthony Chan, DONew York, NY 100131457449621
- Chien Chiang, M.D.New York, NY 100131255341723
- Danny Chu, MDNew York, NY 100131891886842
- Rene Eng, M.D.New York, NY 100131629020151
- Anthony Foong, M.D.New York, NY 100131417030917
- Timothy Johnson, M.D.New York, NY 100131801895248
- Titus Kwok, MDNew York, NY 100131528131984
- Nancy Lau, M.D.New York, NY 100131144208794
Common questions
What is Mark Chu, DO's NPI number?
Mark Chu, DO's National Provider Identifier (NPI) is 1588755565, issued on Sep 27, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Mark Chu, DO located?
The NPPES record lists a practice address at 13-17 Elizabeth Street, New York, NY, 10013. Phone: (212) 219-8031. Providers update this record themselves, so call before visiting.
How can I verify Mark Chu, DO's license?
NPPES lists New York license number 196705, 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 Chu, DO prescribe under Medicare Part D?
In 2024, Mark Chu, DO had 1,040 Medicare Part D claims for 490 beneficiaries; 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.