Marina Fronshtein, MD
Internal Medicine Physician · Brooklyn, NY
Marina Fronshtein, MD is an internal medicine physician with a practice address in Brooklyn, New York, and NPI 1134353436, issued on May 14, 2009. Check the license (New York 258283, as entered in NPPES) on the NYS Education Department, Office of the Professions; the Medicare figures below come from public CMS files.
- Name
- Marina Fronshtein
- Credential
- MD
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- 258283 NY
Self-reported in NPPES; status is on the state search - Practice location
- 800 Poly PL, Brooklyn, NY 11209
- Phone
- (718) 836-6600
- Enumerated
- May 14, 2009
- Record last updated
- Aug 15, 2014 (not updated in 12 years: call before relying on the address or phone)
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 12,067 in New York → Look up another NPI →
Also registered at 800 Poly PL
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Marina Fronshtein 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 258283Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
99% fewer Medicare Part D claims than the average internal medicine physician in 2024
20 Medicare Part D claims, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D.
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.
Marina Fronshtein among 12,067 internal medicine physician records in New York
Marina Fronshtein, 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 2009, is newer than 60% of them.
- NPI issued2009 · 60% of these records are older, 37% newer
- In a Medicare fileYes · 79% of these records are
- In the CMS Doctors and Clinicians fileNo · 60% of these records are
- Record last updated2014 · 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).
1,497 internal medicine physician records list a practice address in Brooklyn
They are 1,497 of the 64,057 NPPES records with a practice address in Brooklyn, and 12,067 internal medicine physician records in New York.
All 12,067 in New York → Every provider in Brooklyn → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Joseph Addeo, M.D.Brooklyn, NY 112091851351571
- Andrew Adler, MDBrooklyn, NY 112091629050125
- Jeffrey Hyman, MDBrooklyn, NY 112091053317396
- Mark Joy, M.D.Brooklyn, NY 112091922062504
- Robert Kelter, MDBrooklyn, NY 112091104805936
- Donald Mandel, M.D.Brooklyn, NY 112091124026265
- John Marino, M.D.Brooklyn, NY 112091568442473
- Leonard Muller, M.D.,Broolkyn, NY 112091659349553
Common questions
What is Marina Fronshtein, MD's NPI number?
Marina Fronshtein, MD's National Provider Identifier (NPI) is 1134353436, issued on May 14, 2009. An NPI identifies a provider in billing; it is not a license.
Where is Marina Fronshtein, MD located?
The NPPES record lists a practice address at 800 Poly PL, Brooklyn, NY, 11209. Phone: (718) 836-6600. Providers update this record themselves, so call before visiting.
How can I verify Marina Fronshtein, MD's license?
NPPES lists New York license number 258283, 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 Marina Fronshtein, MD prescribe under Medicare Part D?
In 2024, Marina Fronshtein, MD had 20 Medicare Part D claims; the average among internal medicine physician prescribers was 3,176. Part D covers Medicare prescriptions only.
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.