Marc Dinowitz, M.D.
Ophthalmology Physician · Riverhead, NY
Marc Dinowitz, M.D. is an ophthalmology physician with a practice address in Riverhead, New York, and NPI 1578582466, issued on Jul 19, 2006. Check the license (New York 207586, as entered in NPPES) on the NYS Education Department, Office of the Professions; the Medicare figures below come from public CMS files.
- Name
- Marc Dinowitz
- Credential
- M.D.
- Primary taxonomy
- Ophthalmology Physician 207W00000X
- License number
- 207586 NY
Self-reported in NPPES; status is on the state search - Practice location
- 937 E Main St, Riverhead, NY 11901
- Phone
- (631) 369-0777
- Enumerated
- Jul 19, 2006
- Record last updated
- Dec 14, 2016 (not updated in 10 years: call before relying on the address or phone)
- Fax
- (631) 369-0976
- Medicaid ID
- 02138907 NY
- Medicare enrollment
- Enrolled (PECOS I20081107000129); accepts Medicare assignment
- Medical or professional school
- State University Of New York At Stony Brook, School Of Medicine, 1996
- Entity
- Type 1 · individual
8 nearest ophthalmology physician records → All 1,822 in New York → Look up another NPI →
Also registered at 937 E Main St
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Daniel Hamou, MDOphthalmology Physician1548208473
- Tami Lapp, ODOptometrist1669517918
- Sheel Patel, MDOphthalmology Physician1790304459
- Scott Sheren, MDOphthalmology Physician1225070378
- Eric Vinokur, MDOphthalmology Physician1801838701
Verify Marc Dinowitz 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 207586Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
17% more Medicare Part D claims than the average ophthalmology physician in 2024
1,775 Medicare Part D claims for 595 beneficiaries, against an average of 1,518 among the 16,459 providers of this specialty who prescribed in Part D.
Most prescribed
- Latanoprost509 claims
- Dorzolamide-Timolol286 claims
- Prednisolone Acetate182 claims
- Neomycin-Polymyxin-Dexameth129 claims
- Erythromycin73 claims
- Travoprost51 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): 91.3 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).
Bills Medicare through one group practice
- North Shore-Lij Medical PCPort Jefferson, NY
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Marc Dinowitz among 1,822 ophthalmology physician records in New York
Marc Dinowitz, M.D. is one of 1,822 ophthalmology physician records with a practice address in New York. 79% 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 16% of them.
- NPI issued2006 · 16% of these records are older, 34% newer
- In a Medicare fileYes · 79% of these records are
- In the CMS Doctors and Clinicians fileYes · 67% of these records are
- Graduated1996 · median 1995 among the 1,215 with a school on file
- Record last updated2016 · 71% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207W00000X and a New York practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Ophthalmology Physician providers in New York
There are 1,822 ophthalmology physician records in New York.
All 1,822 in New York → Every provider in Riverhead → Ophthalmology Physician nationwide →
The 8 ophthalmology physician records with the nearest ZIP codes
- Daniel Hamou, MDRiverhead, NY 119011548208473
- Lauren Mileo, MDRiverhead, NY 119011033609110
- Sheel Patel, MDRiverhead, NY 119011790304459
- Louis Pizzarello, M.D.Riverhead, NY 119011699720466
- Lewis Roberts, MDRiverhead, NY 119011588606602
- Scott Sheren, MDRiverhead, NY 119011225070378
- Eric Vinokur, MDRiverhead, NY 119011801838701
- Keith Scheinblum, M.D.Shirley, NY 119671528134806
Common questions
What is Marc Dinowitz, M.D.'s NPI number?
Marc Dinowitz, M.D.'s National Provider Identifier (NPI) is 1578582466, issued on Jul 19, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Marc Dinowitz, M.D. located?
The NPPES record lists a practice address at 937 E Main St, Riverhead, NY, 11901. Phone: (631) 369-0777. Providers update this record themselves, so call before visiting.
How can I verify Marc Dinowitz, M.D.'s license?
NPPES lists New York license number 207586, 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 Marc Dinowitz, M.D. prescribe under Medicare Part D?
In 2024, Marc Dinowitz, M.D. had 1,775 Medicare Part D claims for 595 beneficiaries; the average among ophthalmology physician prescribers was 1,518. Part D covers Medicare prescriptions only.
What is Marc Dinowitz, M.D.'s MIPS final score?
The 2023 MIPS final score is 91.3 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.