Thomas Clayton Williamson Jr., M.D.
NPI 1023429941ActiveIndividual· Internal Medicine, Hematology & Oncology· Winston Salem, NC
Internal Medicine, Hematology & Oncology (M.D.) in Winston Salem, North Carolina, trained at University of North Carolina at Chapel Hill School of Medicine (class of 2014). In 2024 Medicare paid $4,399,624 for 854 patients, and Part D covered 1,756 of their prescriptions, 74% of them generic. Astrazeneca Pharmaceuticals LP was the largest of 31 companies reporting payments in 2025, $1,971 in all, mostly food and beverage.
Overview
| NPI | 1023429941 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D. |
| Sole proprietor | No |
| NPI issued | May 13, 2014 |
| Last updated in NPPES | Sep 14, 2023 |
| Certified by provider | Jan 8, 2021 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Hematology & Oncology Primary | 207RH0003X | 24656 | MS |
Exclusion screening
| List | Result | Details |
|---|---|---|
| HHS-OIG LEIE · Oct 9, 2026 | No match | Checked by NPI and by name + state |
| North Carolina Medicaid · Nov 10, 2026 | No match | — |
| New York OMIG · Nov 10, 2026 | No match | — |
| Ohio Medicaid · Nov 10, 2026 | No match | — |
| Pennsylvania Medicheck · Nov 10, 2026 | No match | — |
| Washington HCA · Nov 10, 2026 | No match | — |
Official OIG search · How matching works ·Bulk check a roster
Medicare
| Enrollment (PECOS) | Enrolled Practitioner - Hematology/Oncology (MS) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 854 |
|---|---|
| Services billed | 211,995 across 165 procedure codes |
| Paid by Medicare | $4,399,624 |
Part D prescriptions in 2024
| Prescriptions (claims) | 1,756 · 2,344 30-day fills |
|---|---|
| Patients | 279 |
| Total drug cost | $6,030,042 |
| Generic share | 74% of claims |
Education and affiliations
| Medical school | University of North Carolina at Chapel Hill School of Medicine |
|---|---|
| Graduation year | 2014 |
| Medicare specialty | Hematology/Oncology |
| Telehealth | Offers telehealth |
Medical group
- Jackson Oncology AssociatesJackson, MS · 12 clinicians
Hospital affiliations
- Baptist Medical Center AttalaKosciusko, MS
- King's Daughters Medical Center-BrookhavenBrookhaven, MS
- Mississippi Baptist Medical CenterJackson, MS
- S E Lackey Memorial HospitalForest, MS
- St Dominic-Jackson Memorial HospitalJackson, MS
Other facilities
- Accentcare Home Health of CarthageHome health agency · Carthage, MS
- Sta Home Health Agency of Jackson, Inc. DBA Accentcare Home Health of JacksonHome health agency · Clinton, MS
Industry payments (Open Payments)
- 2025$1,971 · 98 payments from 31 companies
- 2024$2,214 · 110 payments from 35 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Astrazeneca Pharmaceuticals LP | $248.57 | 11 |
| Merck Sharp & Dohme LLC | $154.16 | 7 |
| Novartis Pharmaceuticals Corporation | $150.05 | 10 |
| Genentech USA, Inc. | $124.76 | 6 |
| Gilead Sciences, Inc. | $117.95 | 4 |
What the 2025 payments were for
- Food and Beverage$1,876 · 95 payments
- Education$95.53 · 3 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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