Mark Alan Fierstein, MD
Internal Medicine Physician · New Hyde Park, NY
Mark Alan Fierstein, MD is an internal medicine physician with a practice address in New Hyde Park, New York, and NPI 1457426876, issued on Nov 21, 2006. Check the license (New York 157391, as entered in NPPES) on the NYS Education Department, Office of the Professions; the Medicare figures below come from public CMS files.
- Name
- Mark Alan Fierstein
- Credential
- MD
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- 157391 NY
Self-reported in NPPES; status is on the state search - Practice location
- 2001 Marcus Ave Ste S265, New Hyde Park, NY 11042
- Phone
- (516) 686-0500
- Enumerated
- Nov 21, 2006
- Record last updated
- Mar 30, 2021 (not updated in 5 years: call before relying on the address or phone)
- Fax
- (646) 754-7508
- Medicare enrollment
- Enrolled (PECOS I20091203000128); accepts Medicare assignment
- Medical or professional school
- Js Weill Medical College, Cornell University, 1982
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 12,067 in New York → Look up another NPI →
Also registered at 2001 Marcus Ave Ste S265
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Charles Bruno, M.D.Obstetrics & Gynecology Physician1124029434
- Carol Dunetz, MDGynecology Physician1205925765
- David Fierstein, MDInternal Medicine Physician1265507685
- Stuart Hisler, M.D.Internal Medicine Physician1053307561
- Krishna PatelNeurology Physician1780212969
- Yogesh Patel, MDInternal Medicine Physician1245867191
Verify Mark Alan Fierstein 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 157391Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
32% more Medicare Part D claims than the average internal medicine physician in 2024
4,187 Medicare Part D claims for 383 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. Brand-name drugs were 11% of claims. 33 claims were for opioids.
Most prescribed
- Atorvastatin Calcium354 claims
- Amlodipine Besylate236 claims
- Rosuvastatin Calcium173 claims
- Levothyroxine Sodium158 claims
- Hydrochlorothiazide133 claims
- Zolpidem Tartrate125 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): 84.5 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).
Bills Medicare through one group practice
- New York UniversityNew York, NY
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Mark Alan Fierstein among 12,067 internal medicine physician records in New York
Mark Alan Fierstein, MD is one of 12,067 internal medicine 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 8% of them.
- NPI issued2006 · 8% of these records are older, 53% newer
- In a Medicare fileYes · 79% of these records are
- In the CMS Doctors and Clinicians fileYes · 60% of these records are
- Graduated1982 · median 2002 among the 7,221 with a school on file
- Record last updated2021 · 61% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207R00000X and a New York practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
116 internal medicine physician records list a practice address in New Hyde Park
They are 116 of the 4,217 NPPES records with a practice address in New Hyde Park, and 12,067 internal medicine physician records in New York.
All 12,067 in New York → Every provider in New Hyde Park → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Ethan Ben-Sorek, M.D.New Hyde Park, NY 110421609878305
- David Berger, M.D.Lake Success, NY 110421871591677
- David Cooper, MDLake Success, NY 110421457314114
- David Edelson, MDNew Hyde Park, NY 110421568440485
- Genya Frid, MDNew Hyde Park, NY 110421801858055
- Stuart Hisler, M.D.New Hyde Park, NY 110421053307561
- Scott Kellman, M.D.Lake Success, NY 110421215936000
- William Klein, MDNew Hyde Park, NY 110421659359578
Common questions
What is Mark Alan Fierstein, MD's NPI number?
Mark Alan Fierstein, MD's National Provider Identifier (NPI) is 1457426876, issued on Nov 21, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Mark Alan Fierstein, MD located?
The NPPES record lists a practice address at 2001 Marcus Ave Ste S265, New Hyde Park, NY, 11042. Phone: (516) 686-0500. Providers update this record themselves, so call before visiting.
How can I verify Mark Alan Fierstein, MD's license?
NPPES lists New York license number 157391, 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 Alan Fierstein, MD prescribe under Medicare Part D?
In 2024, Mark Alan Fierstein, MD had 4,187 Medicare Part D claims for 383 beneficiaries; the average among internal medicine physician prescribers was 3,176. Part D covers Medicare prescriptions only.
What is Mark Alan Fierstein, MD's MIPS final score?
The 2023 MIPS final score is 84.5 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.