Steven Gruenstein, M.D.
Hematology & Oncology Physician · New York, NY
Steven Gruenstein, M.D. is a hematology & oncology physician with a practice address in New York, New York, and NPI 1407855307, issued on Jul 21, 2005. Check the license (New York 1776051, as entered in NPPES) on the NYS Education Department, Office of the Professions; the Medicare figures below come from public CMS files.
- Name
- Steven Gruenstein
- Credential
- M.D.
- Primary taxonomy
- Hematology & Oncology Physician 207RH0003X
- License number
- 1776051 NY
Self-reported in NPPES; status is on the state search - Practice location
- 12 E 86TH St Ofc 4, New York, NY 10028
- Phone
- (212) 861-6660
- Enumerated
- Jul 21, 2005
- Record last updated
- Jan 17, 2020 (not updated in 6 years: call before relying on the address or phone)
- Fax
- (212) 744-4696
- Medicare enrollment
- Enrolled (PECOS I20060323000785); 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 →
Verify Steven Gruenstein 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 1776051Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
91% more Medicare Part D claims than the average hematology & oncology physician in 2024
1,673 Medicare Part D claims for 245 beneficiaries, against an average of 877 among the 10,784 providers of this specialty who prescribed in Part D. 27 claims were for opioids.
Most prescribed
- Aranesp216 claims
- Hydroxyurea116 claims
- Prednisone72 claims
- Akynzeo64 claims
- Xgeva51 claims
- Lupron Depot48 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): 99.2 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: $16.53
1 payment: education; the largest payer was Agios Pharmaceuticals, Inc. 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
- North Shore Hematology Oncology Associates PCNew York, NY
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Steven Gruenstein among 1,163 hematology & oncology physician records in New York
Steven Gruenstein, M.D. 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 2005, is newer than 0% of them.
- NPI issued2005 · 0% of these records are older, 85% newer
- In a Medicare fileYes · 83% of these records are
- In the CMS Doctors and Clinicians fileYes · 72% of these records are
- Graduated1984 · median 2002 among the 833 with a school on file
- Record last updated2020 · 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
- Joseph Ament, M.D.New York, NY 100281740212166
- Elliot Belenkov, M.D.New York, NY 100281093785396
- Seymour Cohen, M.D.New York, NY 100281477552404
- Anna Gattani, MDNew York, NY 100281255333811
- Robert Glassman, MDNew York, NY 100281558447946
- Michael Goldsmith, M.D.New York, NY 100281528067550
- Amory Novoselac, M.D.New York, NY 100281699852962
- Brenda Panzera, M.D.New York, NY 100281962502013
Common questions
What is Steven Gruenstein, M.D.'s NPI number?
Steven Gruenstein, M.D.'s National Provider Identifier (NPI) is 1407855307, issued on Jul 21, 2005. An NPI identifies a provider in billing; it is not a license.
Where is Steven Gruenstein, M.D. located?
The NPPES record lists a practice address at 12 E 86TH St Ofc 4, New York, NY, 10028. Phone: (212) 861-6660. Providers update this record themselves, so call before visiting.
How can I verify Steven Gruenstein, M.D.'s license?
NPPES lists New York license number 1776051, 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 Steven Gruenstein, M.D. prescribe under Medicare Part D?
In 2024, Steven Gruenstein, M.D. had 1,673 Medicare Part D claims for 245 beneficiaries; the average among hematology & oncology physician prescribers was 877. Part D covers Medicare prescriptions only.
What is Steven Gruenstein, M.D.'s MIPS final score?
The 2023 MIPS final score is 99.2 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.