Wallen Cy Chan, M.D.
Gastroenterology Physician · Staten Island, NY
Wallen Cy Chan, M.D. is a gastroenterology physician with a practice address in Staten Island, New York, and NPI 1043287857, issued on Mar 1, 2006. Check the license (New York 183203, as entered in NPPES) on the NYS Education Department, Office of the Professions; the Medicare figures below come from public CMS files.
- Name
- Wallen Cy Chan
- Credential
- M.D.
- Primary taxonomy
- Gastroenterology Physician 207RG0100X
- License number
- 183203 NY
Self-reported in NPPES; status is on the state search - Practice location
- 78 Todt Hill RD, Staten Island, NY 10314
- Phone
- (718) 448-1122
- Enumerated
- Mar 1, 2006
- Record last updated
- Apr 14, 2008 (not updated in 18 years: call before relying on the address or phone)
- Fax
- (718) 448-8318
- Medicaid ID
- 01768538 NY
- Medicare enrollment
- Enrolled (PECOS I20060608000278); accepts Medicare assignment
- Medical or professional school
- Icahn School Of Medicine At Mount Sinai, 1989
- Entity
- Type 1 · individual
8 nearest gastroenterology physician records → All 1,797 in New York → Look up another NPI →
Also registered at 78 Todt Hill RD
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Phillip Cosentino, MDPulmonary Disease Physician1821039926
- Richard Fazio, M.D.Gastroenterology Physician1285601419
- Alexander Julius, PA-CPhysician Assistant1518501345
- Robert Jutkowitz, MDNeurology Physician1003922915
- Ronald Krantz, M.D.Urology Physician1598858748
- Vito Larocca, MDOphthalmology Physician1376637991
Verify Wallen Cy Chan 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 183203Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
2.3 times the Medicare Part D claims of the average gastroenterology physician in 2024
1,901 Medicare Part D claims for 534 beneficiaries, against an average of 811 among the 16,445 providers of this specialty who prescribed in Part D. Brand-name drugs were 12% of claims.
Most prescribed
- Famotidine371 claims
- Pantoprazole Sodium358 claims
- Omeprazole322 claims
- Gavilyte-G134 claims
- Hydrocortisone73 claims
- Dicyclomine Hcl54 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.
The MIPS final score for 2023 (Medicare payment program): 66.8 of 100
The Merit-based Incentive Payment System score is reported for this clinician. Four categories are weighted into the final score; the average among 454,083 clinicians with a measured score was 83.5.
Source: CMS Quality Payment Program, MIPS performance year 2023; category weights for 2023 (qpp.cms.gov).
Industry payments in 2024: $511.54
21 payments; by number, the most common kind was food and beverage; the largest payer was Madrigal Pharmaceuticals. 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
- Amboy Medical Practice PCStaten Island, NY
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Wallen Cy Chan among 1,797 gastroenterology physician records in New York
Wallen Cy Chan, M.D. 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
- Graduated1989 · median 1999 among the 1,378 with a school on file
- Record last updated2008 · 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 Staten Island → Gastroenterology Physician nationwide →
The 8 gastroenterology physician records with the nearest ZIP codes
- Richard Fazio, M.D.Staten Island, NY 103141285601419
- Elias Purow, M.D.Staten Island, NY 103141306934807
- Vahe Shahnazarian, M.D.Staten Island, NY 103141265770085
- Jeffrey Shaps, MDStaten Island, NY 103141467566497
- Constantine Yiachos, M.D.Staten Island, NY 103141063588127
- Magda Daoud, M.D.Staten Island, NY 103121992051635
- Sherif Farag, MDStaten Island, NY 103121861467250
- Sunil Patel, M.D.Staten Island, NY 103121588721658
Common questions
What is Wallen Cy Chan, M.D.'s NPI number?
Wallen Cy Chan, M.D.'s National Provider Identifier (NPI) is 1043287857, issued on Mar 1, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Wallen Cy Chan, M.D. located?
The NPPES record lists a practice address at 78 Todt Hill RD, Staten Island, NY, 10314. Phone: (718) 448-1122. Providers update this record themselves, so call before visiting.
How can I verify Wallen Cy Chan, M.D.'s license?
NPPES lists New York license number 183203, 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 Wallen Cy Chan, M.D. prescribe under Medicare Part D?
In 2024, Wallen Cy Chan, M.D. had 1,901 Medicare Part D claims for 534 beneficiaries; the average among gastroenterology physician prescribers was 811. Part D covers Medicare prescriptions only.
What is Wallen Cy Chan, M.D.'s MIPS final score?
The 2023 MIPS final score is 66.8 of 100. The average among 454,083 clinicians with a measured score was 83.5.
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.