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Compare the published Medicare service mix of Ruben Niesvizky, MD with clinicians in the same registry specialty: Hematology · Medical Oncology (CMS).

NEW YORK, NY · Exact areaEdit location

2024 published service data · 190 eligible profiles compared. Similarity describes billing patterns, not quality, outcomes, or suitability for your care.

Mateo Mejia Saldarriaga, M.D

Internal Medicine · Medical Oncology (CMS) · New York, NY

Shared published services
3 shared services · view billing descriptions
  • Insertion of needle into vein for collection of blood sample (36415)
  • Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more (99215)
  • Administration of non-hormonal anti-neoplastic chemotherapy under skin or into muscle (96401)
89%Service-mix similarityView profile →

Robert Matthew Gelfand, M.D.

Hematology/Oncology (CMS) · New York, NY

Shared published services
3 shared services · view billing descriptions
  • Insertion of needle into vein for collection of blood sample (36415)
  • Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more (99215)
  • Administration of non-hormonal anti-neoplastic chemotherapy under skin or into muscle (96401)
68%Service-mix similarityView profile →

Rachel Vivian Kramer, M.D.

Hematology/Oncology (CMS) · New York, NY

Shared published services
3 shared services · view billing descriptions
  • Insertion of needle into vein for collection of blood sample (36415)
  • Administration of non-hormonal anti-neoplastic chemotherapy under skin or into muscle (96401)
  • Infusion into a vein for therapy, prevention, or diagnosis, each additional hour (96366)
64%Service-mix similarityView profile →

Rafael Winograd, M.D., PH.D.

Medical Oncology (CMS) · New York, NY

Shared published services
3 shared services · view billing descriptions
  • Insertion of needle into vein for collection of blood sample (36415)
  • Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more (99215)
  • Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)
61%Service-mix similarityView profile →

Veronica Zaharia, M.D.

Hematology/Oncology · Internal Medicine (CMS) · New York, NY

Shared published services
3 shared services · view billing descriptions
  • Insertion of needle into vein for collection of blood sample (36415)
  • Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more (99215)
  • Infusion into a vein for therapy, prevention, or diagnosis, each additional hour (96366)
58%Service-mix similarityView profile →

Boris Kobrinsky, MD

Hematology · Hematology/Oncology · Medical Oncology (CMS) · New York, NY

Shared published services
3 shared services · view billing descriptions
  • Insertion of needle into vein for collection of blood sample (36415)
  • Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more (99215)
  • Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)
57%Service-mix similarityView profile →

Raymond David Pastore, M.D.

Geriatric Medicine · Hematology/Oncology (CMS) · New York, NY

Shared published services
3 shared services · view billing descriptions
  • Insertion of needle into vein for collection of blood sample (36415)
  • Infusion into a vein for therapy, prevention, or diagnosis, each additional hour (96366)
  • Infusion into a vein for therapy, prevention, or diagnosis, 1 hour or less (96365)
57%Service-mix similarityView profile →

Douglas Kanter Marks, M.D.

Hematology/Oncology (CMS) · New York, NY

Shared published services
3 shared services · view billing descriptions
  • Insertion of needle into vein for collection of blood sample (36415)
  • Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more (99215)
  • Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)
56%Service-mix similarityView profile →

Alec S Goldenberg, MD

Hematology/Oncology (CMS) · New York, NY

Shared published services
3 shared services · view billing descriptions
  • Insertion of needle into vein for collection of blood sample (36415)
  • Infusion into a vein for therapy, prevention, or diagnosis, each additional hour (96366)
  • Infusion into a vein for therapy, prevention, or diagnosis, 1 hour or less (96365)
55%Service-mix similarityView profile →

Elaine Shum, M.D.

Medical Oncology (CMS) · New York, NY

Shared published services
3 shared services · view billing descriptions
  • Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more (99215)
  • Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)
  • New patient office or other outpatient visit with a high level of medical decision making, if using time, 60 minutes or more (99205)
52%Service-mix similarityView profile →

Elliot Michael Belenkov, M.D.

Internal Medicine · Medical Oncology (CMS) · New York, NY

Shared published services
3 shared services · view billing descriptions
  • Insertion of needle into vein for collection of blood sample (36415)
  • Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more (99215)
  • Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)
50%Service-mix similarityView profile →

Danielle Seidman

Hematology/Oncology (CMS) · New York, NY

Shared published services
3 shared services · view billing descriptions
  • Insertion of needle into vein for collection of blood sample (36415)
  • Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more (99215)
  • Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)
50%Service-mix similarityView profile →
How this comparison works

We use the same calendar year of CMS Medicare Physician & Other Practitioners data for both providers. Published non-drug service counts are combined by HCPCS code across places of service. We apply log(1 + count), normalize the vectors, and compare them using cosine similarity.

Candidates share the reference provider’s current NPPES primary taxonomy and match the location you enter. We examine up to 500 candidates in NPI order, then show up to 12 with the highest positive similarity within that set. The score is not a percentile, medical recommendation, or prediction. Suppressed services are not estimated. Medicare fee-for-service data does not describe a provider’s entire practice.

Source: CMS Medicare Physician & Other Practitioners - by Provider and Service : 2024-12-01 · Published May 21, 2026.