Roger Keresztes, MD
NPI 1770638868 · Hematology & Oncology Physician · Stony Brook, NY
Enrolled with Medicare as Practitioner - Medical Oncology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Roger Keresztes, MD is a Hematology & Oncology Physician provider in Stony Brook, NY (NPI 1770638868).
Provider details
- NPI number
- 1770638868
- Entity type
- Individual
- Primary specialty
- Hematology & Oncology PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- 180051 (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
19 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
902 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) |
|---|---|---|
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 430 | $107 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 212 | $150 |
| Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 35 Minutes99232 | 143 | $91 |
| New Patient Office Or Other Outpatient Visit With a High Level of Medical Decision Making, If Using Time, 60 Minutes Or More99205 | 41 | $260 |
| Initial Hospital Care With Moderate Level of Medical Decision Making, If Using Time, at Least 75 Minutes99223 | 33 | $199 |
| Hospital Discharge Day Management, 30 Minutes Or Less |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 14 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Levothyroxine Sodium | 50 | 17 |
| Ondansetron Hcl | 44 | 29 |
| Oxycodone Hcl | 44 | 18 |
| Osimertinib Mesylatebrand: Tagrisso | 32 | — |
| Mirtazapine | 25 | — |
| Oxycodone Hcl/Acetaminophenbrand: Oxycodone-Acetaminophen | 20 | — |
| Dexamethasone | 18 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$55 across 2 records (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
- 2007-01-25
- Last updated
- 2022-04-12
- Certified
- 2022-04-12
Frequently asked questions
- What is Roger Keresztes's NPI number?
- Roger Keresztes's National Provider Identifier (NPI) is 1770638868, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Roger Keresztes's specialty?
- Roger Keresztes is listed in the NPPES registry with a primary specialty of Hematology & Oncology Physician (Allopathic & Osteopathic Physicians).
- Where is Roger Keresztes located?
- Roger Keresztes's practice location on file with NPPES is 3 Edmund Pellegrino Rd, Stony Brook, NY 11794-9447.
- What is Roger Keresztes's phone number?
- The practice phone number listed in the NPPES registry for Roger Keresztes is (631) 638-1000.
- Does Roger Keresztes accept Medicare?
- Roger Keresztes is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Roger Keresztes's NPI active?
- Yes — Roger Keresztes's NPI (1770638868) is active in the NPPES registry as of the last update on 2022-04-12.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.