Dr. Robert Stewart
Radiation Oncology (Radiation Oncology Physician)
- Medicare participating
At a glance
- Years since graduation
- 17
- In the NPI registry since
- 2014
- Medicare patients seen, 2024
- 161
The NPI date is when this clinician registered for a National Provider Identifier, the billing number used on health claims. It is not a license, graduation or board-certification date. What an NPI is
Education and training
- 2014Registered with an NPI (national billing number; not a license date)
Medicare’s Care Compare data doesn’t list this clinician’s medical school. Undergraduate school, residency, fellowship, licensing exams and board certification aren’t in public federal data. Board certification can be confirmed with the certifying board (ABMS member boards for MDs, AOA boards for DOs).
Specialties and state licenses
-
Radiation Oncology Physician primary
NY license P93343
As reported to the NPI registry. To confirm a license is current, check the state medical board.
Where they work
Hospitals
- Mount Sinai West New York, NY
- Mount Sinai Beth Israel New York, NY
Medical groups
- Icahn School of Medicine at Mount Sinai (2,843 clinicians)
Hospitals this clinician lists with Medicare, and groups they bill Medicare through (Care Compare). Affiliation doesn’t mean they see patients at every location.
Medicare patients and services
- Medicare patients, 2024
- 161
- Services billed
- 1,241
- Patients’ average age
- 74
| Service | Times | Patients |
|---|---|---|
| Ct guidance for insertion of radiation therapy fields | 494 | 16 |
| Established patient office or other outpatient visit, 20-29 minutes | 146 | 86 |
| Calculation of radiation therapy dose | 145 | 30 |
| Radiation treatment management, 5 treatment sessions | 96 | 23 |
| New patient office or other outpatient visit, 60-74 minutes | 78 | 78 |
| Design and construction of complex radiation treatment device | 41 | 12 |
| Complex radiation therapy planning | 38 | 38 |
| Design and construction of radiation treatment device for high precision radiation therapy | 29 | 28 |
| High precision radiation therapy planning | 28 | 28 |
| Design and construction of simple radiation treatment device | 24 | 24 |
Medicare fee-for-service only. CMS leaves out services billed for fewer than 11 patients. These figures describe a practice’s Medicare work; they aren’t a measure of quality.
Payments from drug and device companies
In 2025, 2 companies reported 2 payments worth $35.48 in total to this clinician.
| Sumitomo Pharma America, Inc. | $18.33 |
|---|---|
| Bayer HealthCare Pharmaceuticals Inc. | $17.15 |
| Food and Beverage | $35.48 |
|---|
From CMS Open Payments. A payment is not evidence of wrongdoing; many are for consulting, teaching or meals. Clinicians can review and dispute their records with CMS.