Steven Horwitz, MD
Medical Oncology Physician · New York, NY
Steven Horwitz, MD is a medical oncology physician with a practice address in New York, New York, and NPI 1811968852, issued on Jan 29, 2006. Check the license (New York 198458, as entered in NPPES) on the NYS Education Department, Office of the Professions; the Medicare figures below come from public CMS files.
- Name
- Steven Horwitz
- Credential
- MD
- Primary taxonomy
- Medical Oncology Physician 207RX0202X
- License number
- 198458 NY
Self-reported in NPPES; status is on the state search - Practice location
- 1275 York Ave, New York, NY 10021
- Phone
- (212) 639-2000
- Enumerated
- Jan 29, 2006
- Record last updated
- Apr 6, 2015 (not updated in 11 years: call before relying on the address or phone)
- Medicare enrollment
- Enrolled (PECOS I20070816000940); accepts Medicare assignment
- Medical or professional school
- Clvlnd Clinic Lerner College Of Med Of Case Wstn Rsv University, 1993
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest medical oncology physician records → All 548 in New York → Look up another NPI →
Also registered at 1275 York Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Ghassan Abou-Alfa, MDMedical Oncology Physician1134190168
- Andrea Abramson, MDDiagnostic Radiology Physician1952381030
- David H Abramson, MDOphthalmology Physician1235114026
- Sara Abramson, MDDiagnostic Radiology Physician1497733133
- Lauren Abrey, MDNeurology Physician1336110360
- Nadeem Abu-Rustum, MDGynecologic Oncology Physician1164407540
Verify Steven Horwitz 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 198458Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
83% fewer Medicare Part D claims than the average medical oncology physician in 2024
122 Medicare Part D claims for 33 beneficiaries, against an average of 703 among the 4,230 providers of this specialty who prescribed in Part D. Brand-name drugs were 19% of claims.
Most prescribed
- Levothyroxine Sodium33 claims
- Bexarotene16 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): 79 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: $3,187.42
2 payments; by number, the most common kind was food and beverage; the largest payer was Takeda Pharmaceuticals U.S.A., Inc. The 3,343 providers of this specialty with any payment received $11,773.47 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
- Memorial Hematology Lymphoma GroupNew York, NY
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Steven Horwitz among 548 medical oncology physician records in New York
Steven Horwitz, MD is one of 548 medical oncology physician records with a practice address in New York. 80% 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 6% of them.
- NPI issued2006 · 6% of these records are older, 60% newer
- In a Medicare fileYes · 80% of these records are
- In the CMS Doctors and Clinicians fileYes · 71% of these records are
- Graduated1993 · median 2005 among the 389 with a school on file
- Record last updated2015 · 60% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RX0202X and a New York practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Medical Oncology Physician providers in New York
There are 548 medical oncology physician records in New York.
All 548 in New York → Every provider in New York → Medical Oncology Physician nationwide →
The 8 medical oncology physician records with the nearest ZIP codes
- Ghassan Abou-Alfa, MDNew York, NY 100211134190168
- Christopher Azzoli, MDNew York, NY 100211861463895
- Ethan Basch, MDNew York, NY 100211306817333
- George Bosl, MDNew York, NY 100211679544605
- Jacqueline Bromberg, MDNew York, NY 100211114998143
- Gabriella D'Andrea, MDNew York, NY 100211013988047
- Kapil Dhingra, MDNew York, NY 100211912978941
- Maura Dickler, MDNew York, NY 100211730150764
Common questions
What is Steven Horwitz, MD's NPI number?
Steven Horwitz, MD's National Provider Identifier (NPI) is 1811968852, issued on Jan 29, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Steven Horwitz, MD located?
The NPPES record lists a practice address at 1275 York Ave, New York, NY, 10021. Phone: (212) 639-2000. Providers update this record themselves, so call before visiting.
How can I verify Steven Horwitz, MD's license?
NPPES lists New York license number 198458, 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 Horwitz, MD prescribe under Medicare Part D?
In 2024, Steven Horwitz, MD had 122 Medicare Part D claims for 33 beneficiaries; the average among medical oncology physician prescribers was 703. Part D covers Medicare prescriptions only.
What is Steven Horwitz, MD's MIPS final score?
The 2023 MIPS final score is 79 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.