Mark N. Sayegh, MD
Infectious Disease Physician · Hawthorne, NY
Mark N. Sayegh, MD is an infectious disease physician with a practice address in Hawthorne, New York, and NPI 1700374360, issued on Apr 28, 2018. Check the license (New York 311603, as entered in NPPES) on the NYS Education Department, Office of the Professions; the Medicare figures below come from public CMS files.
- Name
- Mark N. Sayegh
- Credential
- MD
- Primary taxonomy
- Infectious Disease Physician 207RI0200X
- License number
- 311603 NY
Self-reported in NPPES; status is on the state search - Practice location
- 19 Bradhurst Ave Ste 3060N, Hawthorne, NY 10532
- Phone
- (914) 372-7887
- Enumerated
- Apr 28, 2018
- Record last updated
- Nov 11, 2024
- Fax
- (914) 372-7882
- Medicare enrollment
- Enrolled (PECOS I20210810003477); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest infectious disease physician records → All 970 in New York → Look up another NPI →
Also registered at 19 Bradhurst Ave Ste 3060N
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Mark N. Sayegh 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 311603Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
77% fewer Medicare Part D claims than the average infectious disease physician in 2024
161 Medicare Part D claims for 16 beneficiaries, against an average of 689 among the 7,388 providers of this specialty who prescribed in Part D. Brand-name drugs were 37% of claims.
Most prescribed
- Genvoya22 claims
- Biktarvy20 claims
- Atorvastatin Calcium15 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): 100 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: $281.52
11 payments; by number, the most common kind was food and beverage; the largest payer was ViiV Healthcare Company. The 3,895 providers of this specialty with any payment received $4,362.19 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 2 group practices
- Symphony Medical PCYonkers, NY
- Westchester Medical Center Advanced Physician Services PCValhalla, NY
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Mark N. Sayegh among 970 infectious disease physician records in New York
Mark N. Sayegh, MD is one of 970 infectious disease physician records with a practice address in New York. 78% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2018, is newer than 91% of them.
- NPI issued2018 · 91% of these records are older, 6% newer
- In a Medicare fileYes · 78% of these records are
- In the CMS Doctors and Clinicians fileYes · 64% of these records are
- Graduated2018 · median 2002 among the 624 with a school on file
- Record last updated2024 · 63% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RI0200X and a New York practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Infectious Disease Physician providers in New York
There are 970 infectious disease physician records in New York.
All 970 in New York → Every provider in Hawthorne → Infectious Disease Physician nationwide →
The 8 infectious disease physician records with the nearest ZIP codes
- Marisa Montecalvo, MDHawthorne, NY 105321609899335
- John Nowakowski, MDHawthorne, NY 105321558384198
- Akira Shishido, M.D.Hawthorne, NY 105321912346909
- Fnu Sonia, MDHawthorne, NY 105321467028506
- Gary Wormser, MDHawthorne, NY 105321790708428
- Ruchika Jain, M.DHartsdale, NY 105301538335104
- Sean Cloonan, M.D.Harrison, NY 105281912171430
- Kenneth Croen, M.D.Harrison, NY 105281831115880
Common questions
What is Mark N. Sayegh, MD's NPI number?
Mark N. Sayegh, MD's National Provider Identifier (NPI) is 1700374360, issued on Apr 28, 2018. An NPI identifies a provider in billing; it is not a license.
Where is Mark N. Sayegh, MD located?
The NPPES record lists a practice address at 19 Bradhurst Ave Ste 3060N, Hawthorne, NY, 10532. Phone: (914) 372-7887. Providers update this record themselves, so call before visiting.
How can I verify Mark N. Sayegh, MD's license?
NPPES lists New York license number 311603, 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 N. Sayegh, MD prescribe under Medicare Part D?
In 2024, Mark N. Sayegh, MD had 161 Medicare Part D claims for 16 beneficiaries; the average among infectious disease physician prescribers was 689. Part D covers Medicare prescriptions only.
What is Mark N. Sayegh, MD's MIPS final score?
The 2023 MIPS final score is 100 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.