Carl Rogaston Willis, M.D.
NPI 1154376259ActiveIndividual· Internal Medicine, Hematology & Oncology· Nashville, TN
Internal Medicine, Hematology & Oncology (M.D.) in Nashville, Tennessee, trained at University of Alabama School of Medicine (class of 1993). Their prescriptions cost Medicare Part D more than their services did: $1,339,500 for 881 claims, against $691,062 paid for services in 2024. Novartis Pharmaceuticals Corporation was the largest of 41 companies reporting payments in 2025, $3,030 in all, mostly food and beverage.
Overview
| NPI | 1154376259 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D. |
| Sole proprietor | No |
| NPI issued | May 24, 2006 |
| Last updated in NPPES | Sep 17, 2025 |
| Certified by provider | Sep 17, 2025 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Hematology & Oncology Primary | 207RH0003X | 037952 | TN |
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 (TN) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 185 |
|---|---|
| Services billed | 40,195 across 91 procedure codes |
| Paid by Medicare | $691,062 |
Part D prescriptions in 2024
| Prescriptions (claims) | 881 · 1,431 30-day fills |
|---|---|
| Patients | 170 |
| Total drug cost | $1,339,500 |
| Generic share | 85% of claims |
Education and affiliations
| Medical school | University of Alabama School of Medicine |
|---|---|
| Graduation year | 1993 |
| Medicare specialty | Medical Oncology |
| Telehealth | Offers telehealth |
Medical group
- Tennessee Oncology PLLCNashville, TN · 358 clinicians
Hospital affiliations
- Ascension Saint Thomas HospitalNashville, TN
- Tristar Centennial Medical CenterNashville, TN
- Tristar Hendersonville Medical CenterHendersonville, TN
- Tristar Northcrest Medical CenterSpringfield, TN
Industry payments (Open Payments)
- 2025$3,030 · 124 payments from 41 companies
- 2024$3,210 · 136 payments from 46 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Novartis Pharmaceuticals Corporation | $396.06 | 17 |
| Astrazeneca Pharmaceuticals LP | $277.37 | 9 |
| Merck Sharp & Dohme LLC | $213.42 | 8 |
| Regeneron Healthcare Solutions, Inc. | $179.31 | 10 |
| Stemline Therapeutics Inc. | $159.81 | 3 |
What the 2025 payments were for
- Food and Beverage$2,942 · 122 payments
- Education$88.49 · 2 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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