Robert Stewart
NPI 1841607520 · Radiation Oncology Physician · New York, NY
Enrolled with Medicare as Practitioner - Radiation Oncology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Robert Stewart is a Radiation Oncology Physician provider in New York, NY (NPI 1841607520).
Provider details
- NPI number
- 1841607520
- Entity type
- Individual
- Primary specialty
- Radiation Oncology PhysicianAllopathic & Osteopathic Physicians
- Sex
- Male
- Sole proprietor
- No
- License
- P93343 (NY)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure25% of score
11 yrs in NPPES registry
- Profile completeness25% of score
100% of core fields populated
- Practice footprint15% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)25% of score
1,058 Medicare services, 2024 (ranked within specialty)
- Open Payments transparency10% of score
Has Open Payments disclosures (2024)
Medicare volume is ranked against active providers in the same specialty. Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our .
What this provider does (Medicare)
Based on Medicare fee-for-service claims, 2024; not all care is captured.
| Service (HCPCS) | Medicare services | Typical Medicare-allowed (2024) |
|---|---|---|
| Ct Guidance for Insertion of Radiation Therapy Fields77014 | 526 | $49 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 175 | $101 |
| Calculation of Radiation Therapy Dose77300 | 97 | $35 |
| Radiation Treatment Management, 5 Treatment Sessions77427 | 96 | $211 |
| New Patient Office Or Other Outpatient Visit With a High Level of Medical Decision Making, If Using Time, 60 Minutes Or More99205 | 62 | $246 |
| Complex Radiation Therapy Planning77263 | 20 | $184 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$15 across 1 record (Open Payments 2024)
Open Payments discloses payments and transfers of value (meals, travel, consulting, research, royalties) from drug and device makers to providers. This is a transparency signal, not a verdict — such payments are legal and common, and their presence is neither an endorsement nor a criticism. Source: CMS Open Payments, program year 2024.
Practice location
Mailing address
Registry dates
- Enumerated
- 2014-07-15
- Last updated
- 2014-07-15
Frequently asked questions
- What is Robert Stewart's NPI number?
- Robert Stewart's National Provider Identifier (NPI) is 1841607520, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Robert Stewart's specialty?
- Robert Stewart is listed in the NPPES registry with a primary specialty of Radiation Oncology Physician (Allopathic & Osteopathic Physicians).
- Where is Robert Stewart located?
- Robert Stewart's practice location on file with NPPES is 353 E 17th St Fl 2, New York, NY 10003-3821.
- What is Robert Stewart's phone number?
- The practice phone number listed in the NPPES registry for Robert Stewart is (212) 420-3743.
- Does Robert Stewart accept Medicare?
- Robert Stewart is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Robert Stewart's NPI active?
- Yes — Robert Stewart's NPI (1841607520) is active in the NPPES registry as of the last update on 2014-07-15.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.