Roger S. Keresztes, MD
NPI 1770638868ActiveIndividual· Internal Medicine, Hematology & Oncology· Stony Brook, NY
Internal Medicine, Hematology & Oncology (MD) in Stony Brook, New York, trained at Rutgers New Jersey Medical School (class of 1987). Their prescriptions cost Medicare Part D more than their services did: $1,082,954 for 543 claims, against $88,121 paid for services in 2024. Merck Sharp & Dohme LLC reported $14.92 in payments in 2025, mostly food and beverage.
Overview
| NPI | 1770638868 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD |
| Sole proprietor | No |
| NPI issued | Jan 25, 2007 |
| Last updated in NPPES | Apr 12, 2022 |
| Certified by provider | Apr 12, 2022 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Hematology & Oncology Primary | 207RH0003X | 180051 | NY |
Exclusion screening
| List | Result | Details |
|---|---|---|
| HHS-OIG LEIE · Nov 10, 2026 | No match | Checked by NPI and by name + state |
| North Carolina Medicaid · Nov 11, 2026 | No match | — |
| New York OMIG · Nov 11, 2026 | No match | — |
| Ohio Medicaid · Nov 11, 2026 | No match | — |
| Pennsylvania Medicheck · Nov 11, 2026 | No match | — |
| Washington HCA · Nov 11, 2026 | No match | — |
Official OIG search · How matching works ·Bulk check a roster
Medicare
| Enrollment (PECOS) | Enrolled Practitioner - Medical Oncology (NY) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 258 |
|---|---|
| Services billed | 927 across 15 procedure codes |
| Paid by Medicare | $88,121 |
Part D prescriptions in 2024
| Prescriptions (claims) | 543 · 702 30-day fills |
|---|---|
| Patients | 97 |
| Total drug cost | $1,082,954 |
| Generic share | 78% of claims |
Education and affiliations
| Medical school | Rutgers New Jersey Medical School |
|---|---|
| Graduation year | 1987 |
| Medicare specialty | Medical Oncology |
| Secondary specialties | Hematology |
Medical group
- Stony Brook Internists University Faculty Practice CorporationStony Brook, NY · 428 clinicians
Hospital affiliation
- Suny/Stony Brook University HospitalStony Brook, NY
Other facilities
- Good Shepherd HospiceHospice · Farmingdale, NY
Industry payments (Open Payments)
- 2025$14.92 · 1 payment from 1 company
- 2024$55.34 · 2 payments from 2 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Merck Sharp & Dohme LLC | $14.92 | 1 |
What the 2025 payments were for
- Food and Beverage$14.92 · 1 payment
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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All 25 hematologist-oncologists in Stony Brook · All hematologist-oncologists in New York