John T. Hamm, M.D.
NPI 1023075660ActiveIndividual· Internal Medicine, Medical Oncology· Louisville, KY
Internal Medicine, Medical Oncology (M.D.) in Louisville, Kentucky, trained at Vanderbilt University School of Medicine (class of 1982). Their prescriptions cost Medicare Part D more than their services did: $2,153,675 for 1,188 claims, against $77,877 paid for services in 2024. Astrazeneca Pharmaceuticals LP was the largest of 3 companies reporting payments in 2025, $264.32 in all, mostly food and beverage.
Overview
| NPI | 1023075660 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D. |
| Sole proprietor | No |
| NPI issued | Apr 27, 2006 |
| Last updated in NPPES | Jan 19, 2021 |
| Certified by provider | Jan 19, 2021 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Medical Oncology Primary | 207RX0202X | 22818 | KY |
Exclusion screening
| List | Result | Details |
|---|---|---|
| HHS-OIG LEIE · Oct 9, 2026 | No match | Checked by NPI and by name + state |
| North Carolina Medicaid · Nov 4, 2026 | No match | — |
| New York OMIG · Nov 4, 2026 | No match | — |
| Ohio Medicaid · Nov 4, 2026 | No match | — |
| Pennsylvania Medicheck · Nov 4, 2026 | No match | — |
| Washington HCA · Nov 4, 2026 | No match | — |
Official OIG search · How matching works ·Bulk check a roster
Medicare
| Enrollment (PECOS) | Enrolled Practitioner - Hematology/Oncology (IN); Practitioner - Medical Oncology (KY) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 246 |
|---|---|
| Services billed | 1,463 across 16 procedure codes |
| Paid by Medicare | $77,877 |
Part D prescriptions in 2024
| Prescriptions (claims) | 1,188 · 1,435 30-day fills |
|---|---|
| Patients | 168 |
| Total drug cost | $2,153,675 |
| Generic share | 81% of claims |
Education and affiliations
| Medical school | Vanderbilt University School of Medicine |
|---|---|
| Graduation year | 1982 |
| Medicare specialty | Medical Oncology |
Medical group
- Norton Hospitals, IncLouisville, KY · 137 clinicians
Hospital affiliations
- Norton Clark HospitalJeffersonville, IN
- Norton Hospitals, IncLouisville, KY
Industry payments (Open Payments)
- 2025$264.32 · 3 payments from 3 companies
- 2024$10,790 · 9 payments from 4 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Astrazeneca Pharmaceuticals LP | $135.00 | 1 |
| Biontech Se | $111.59 | 1 |
| Daiichi Sankyo Inc. | $17.73 | 1 |
What the 2025 payments were for
- Food and Beverage$264.32 · 3 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
Other Internal Medicine, Medical Oncology providers in Louisville
- 1922520808
- 1558335265
- 1790218451
- 1891824587
- 1518939933
- 1598738932
- 1497720049
- 1255383162
- 1316948995
- 1053377291
- 1942201652
- 1952369621
All Internal Medicine, Medical Oncology providers in Kentucky →