Irl Brian Greenwell, M.D.
NPI 1043573009ActiveIndividual· Internal Medicine, Hematology & Oncology· Charleston, SC
Internal Medicine, Hematology & Oncology (M.D.) in Charleston, South Carolina, trained at Medical University of South Carolina College of Medicine (class of 2012). Their prescriptions cost Medicare Part D more than their services did: $776,264 for 342 claims, against $58,751 paid for services in 2024. Merck Sharp & Dohme LLC was the largest of 39 companies reporting payments in 2025, $2,357 in all, mostly food and beverage.
Overview
| NPI | 1043573009 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D. |
| Sole proprietor | No |
| NPI issued | Jun 24, 2012 |
| Last updated in NPPES | Jan 4, 2025 |
| Certified by provider | Jan 4, 2025 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Hematology & Oncology Primary | 207RH0003X | 52275 | SC |
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 - Hematology/Oncology (SC) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 248 |
|---|---|
| Services billed | 797 across 23 procedure codes |
| Paid by Medicare | $58,751 |
Part D prescriptions in 2024
| Prescriptions (claims) | 342 · 406 30-day fills |
|---|---|
| Patients | 90 |
| Total drug cost | $776,264 |
| Generic share | 76% of claims |
Education and affiliations
| Medical school | Medical University of South Carolina College of Medicine |
|---|---|
| Graduation year | 2012 |
| Medicare specialty | Hematology/Oncology |
| Secondary specialties | Internal Medicine |
| Telehealth | Offers telehealth |
Medical group
- Bon Secours St Francis Xavier Hospital IncCharleston, SC · 207 clinicians
Hospital affiliations
- Bon Secours-St Francis Xavier HospitalCharleston, SC
- Mount Pleasant HospitalMount Pleasant, SC
- Musc Medical CenterCharleston, SC
- Roper HospitalCharleston, SC
- Roper St Francis Hospital-Berkeley IncSummerville, SC
Industry payments (Open Payments)
- 2025$2,357 · 99 payments from 39 companies
- 2024$1,214 · 53 payments from 29 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Merck Sharp & Dohme LLC | $233.40 | 9 |
| Novartis Pharmaceuticals Corporation | $227.82 | 10 |
| E.R. Squibb & Sons, L.L.C. | $216.39 | 10 |
| Kite Pharma, Inc. | $172.93 | 5 |
| Pfizer Inc. | $156.26 | 7 |
What the 2025 payments were for
- Food and Beverage$2,357 · 99 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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All 49 hematologist-oncologists in Charleston · All hematologist-oncologists in South Carolina