Zachary R. Marwil, MD
Gastroenterology Physician · Wantagh, NY
Zachary R. Marwil, MD is a gastroenterology physician with a practice address in Wantagh, New York, and NPI 1609002229, issued on Jun 10, 2009. Check the license (New York 268414, as entered in NPPES) on the NYS Education Department, Office of the Professions; the Medicare figures below come from public CMS files.
- Name
- Zachary R. Marwil
- Credential
- MD
- Primary taxonomy
- Gastroenterology Physician 207RG0100X
- License number
- 268414 NY
Self-reported in NPPES; status is on the state search - Practice location
- 3019 Merrick RD, Wantagh, NY 11793
- Phone
- (516) 785-8075
- Enumerated
- Jun 10, 2009
- Record last updated
- Mar 22, 2021 (not updated in 5 years: call before relying on the address or phone)
- Fax
- (516) 785-8139
- Medicare enrollment
- Enrolled (PECOS I20140501001262); accepts Medicare assignment
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest gastroenterology physician records → All 1,797 in New York → Look up another NPI →
Also registered at 3019 Merrick RD
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Arthur Boshnack, M.D.Specialist1235212242
- Jeffrey Novak, M.D.Specialist1700969714
Verify Zachary R. Marwil 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 268414Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
65% more Medicare Part D claims than the average gastroenterology physician in 2024
1,338 Medicare Part D claims for 371 beneficiaries, against an average of 811 among the 16,445 providers of this specialty who prescribed in Part D. Brand-name drugs were 20% of claims.
Most prescribed
- Pantoprazole Sodium316 claims
- Famotidine168 claims
- Sod Sulf-Potass Sulf-Mag Sulf144 claims
- Omeprazole113 claims
- Mesalamine59 claims
- Mesalamine Er47 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 practice group's MIPS final score for 2023 (Medicare payment program): 73.4 of 100
The Merit-based Incentive Payment System score is reported for the practice group, not for one clinician alone. 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, group reporting; category weights for 2023 (qpp.cms.gov).
Industry payments in 2024: $1,519.64
70 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
- Gastrointestinal Specialist OF Long Island, P.C.Wantagh, NY
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Zachary R. Marwil among 1,797 gastroenterology physician records in New York
Zachary R. Marwil, 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 2009, is newer than 69% of them.
- NPI issued2009 · 69% of these records are older, 27% newer
- In a Medicare fileYes · 88% of these records are
- In the CMS Doctors and Clinicians fileYes · 77% of these records are
- Graduated2009 · median 1999 among the 1,378 with a school on file
- Record last updated2021 · 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 Wantagh → Gastroenterology Physician nationwide →
The 8 gastroenterology physician records with the nearest ZIP codes
- Carly Barth, M.D.Wantagh, NY 117931588926604
- Jarred Marshak, M.D.Wantagh, NY 117931538417027
- Phillip Moskowitz, MDWantagh, NY 117931285628032
- Anthony Razzano, MDWantagh, NY 117931912388430
- Jordan Rush, M.D.Wantagh, NY 117931306002373
- Juan Carlos Bucobo, M.D.Stony Brook, NY 117941982892592
- Michael Clores, D.O.Stony Brook, NY 117941598024390
- Daniel Jamorabo, M.D.Stony Brook, NY 117941912325044
Common questions
What is Zachary R. Marwil, MD's NPI number?
Zachary R. Marwil, MD's National Provider Identifier (NPI) is 1609002229, issued on Jun 10, 2009. An NPI identifies a provider in billing; it is not a license.
Where is Zachary R. Marwil, MD located?
The NPPES record lists a practice address at 3019 Merrick RD, Wantagh, NY, 11793. Phone: (516) 785-8075. Providers update this record themselves, so call before visiting.
How can I verify Zachary R. Marwil, MD's license?
NPPES lists New York license number 268414, 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 Zachary R. Marwil, MD prescribe under Medicare Part D?
In 2024, Zachary R. Marwil, MD had 1,338 Medicare Part D claims for 371 beneficiaries; the average among gastroenterology physician prescribers was 811. Part D covers Medicare prescriptions only.
What is Zachary R. Marwil, MD's MIPS final score?
The 2023 MIPS final score is 73.4 of 100, reported for the practice group. 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.