Ruben Niesvizky, MD
Hematology & Oncology Physician · New York, NY
Ruben Niesvizky, MD is a hematology & oncology physician with a practice address in New York, New York, and NPI 1710074885, issued on Oct 9, 2006. Check the license (New York 195309, as entered in NPPES) on the NYS Education Department, Office of the Professions; the Medicare figures below come from public CMS files.
- Name
- Ruben Niesvizky
- Credential
- MD
- Primary taxonomy
- Hematology & Oncology Physician 207RH0003X
- License number
- 195309 NY
Self-reported in NPPES; status is on the state search - Practice location
- 425 E 61St St FL 8, New York, NY 10065
- Phone
- (646) 962-6500
- Enumerated
- Oct 9, 2006
- Record last updated
- Jul 31, 2023
- Fax
- (212) 746-8961
- Medicare enrollment
- Enrolled (PECOS I20100707000469); accepts Medicare assignment
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest hematology & oncology physician records → All 1,163 in New York → Look up another NPI →
Also registered at 425 E 61St St FL 8
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Tessa Cigler, MDMedical Oncology Physician1184692964
- Janiece Francis, NURSE PRACTITIONERPrimary Care Nurse Practitioner1467963157
- Christopher Lee, PHARMDPharmacist1558675835
- Alicia Lewis, FNP-BCFamily Nurse Practitioner1366825549
- Nicole Michaels, NPAdult Health Nurse Practitioner1518505767
- Raymond Pastore, M.D.Hematology & Oncology Physician1124027487
Verify Ruben Niesvizky 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 195309Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
41% fewer Medicare Part D claims than the average hematology & oncology physician in 2024
514 Medicare Part D claims for 74 beneficiaries, against an average of 877 among the 10,784 providers of this specialty who prescribed in Part D. Brand-name drugs were 13% of claims. 22 claims were for opioids.
Most prescribed
- Valacyclovir63 claims
- Eliquis21 claims
- Acyclovir18 claims
- Dexamethasone17 claims
- Sulfamethoxazole-Trimethoprim16 claims
- Montelukast Sodium15 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): 100 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).
Industry payments in 2024: $143,017.36
31 payments; by number, the most common kind was food and beverage; the largest payer was GlaxoSmithKline, LLC. The 8,560 providers of this specialty with any payment received $7,481.41 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
- Weill Medical College OF CornellNew York, NY
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Ruben Niesvizky among 1,163 hematology & oncology physician records in New York
Ruben Niesvizky, MD is one of 1,163 hematology & oncology physician records with a practice address in New York. 83% 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 15% of them.
- NPI issued2006 · 15% of these records are older, 53% newer
- In a Medicare fileYes · 83% of these records are
- In the CMS Doctors and Clinicians fileYes · 72% of these records are
- Graduated1985 · median 2002 among the 833 with a school on file
- Record last updated2023 · 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 207RH0003X and a New York practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Hematology & Oncology Physician providers in New York
There are 1,163 hematology & oncology physician records in New York.
All 1,163 in New York → Every provider in New York → Hematology & Oncology Physician nationwide →
The 8 hematology & oncology physician records with the nearest ZIP codes
- Massimo Cristofanilli, M.D.New York, NY 100651891880563
- James Fetten, M.D.New York, NY 100651811966435
- Richard Geltman, MDNew York, NY 100651659362242
- Sergio Giralt, M.D.New York, NY 100651639278880
- Ross Levine, MDNew York, NY 100651225011091
- Raymond Pastore, M.D.New York, NY 100651124027487
- Jacob Rand, MDNew York, NY 100651164531828
- Charles Rudin, M.D., PH.D.New York, NY 100651467483404
Common questions
What is Ruben Niesvizky, MD's NPI number?
Ruben Niesvizky, MD's National Provider Identifier (NPI) is 1710074885, issued on Oct 9, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Ruben Niesvizky, MD located?
The NPPES record lists a practice address at 425 E 61St St FL 8, New York, NY, 10065. Phone: (646) 962-6500. Providers update this record themselves, so call before visiting.
How can I verify Ruben Niesvizky, MD's license?
NPPES lists New York license number 195309, 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 Ruben Niesvizky, MD prescribe under Medicare Part D?
In 2024, Ruben Niesvizky, MD had 514 Medicare Part D claims for 74 beneficiaries; the average among hematology & oncology physician prescribers was 877. Part D covers Medicare prescriptions only.
What is Ruben Niesvizky, MD's MIPS final score?
The 2023 MIPS final score is 100 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.