John Kaczmar, MD
Medical Oncology · Charleston, SCNPI 1134448079
Payments from drug & device makers
Across 269 payments — averaging $28,800 each. Meals, travel, consulting and speaking fees, gifts and royalties reported by drug and device makers.
- Merck$6.8M
- Regeneron$332K
- Ascendis Pharma Endocrinology Inc$145K
- GSK$142K
- AVEO Pharmaceuticals, Inc.$131K
- Merck Healthcare Kgaa$76K
- plus $91K from 13 others
Across 60 payments — averaging $181.07 each. Payments tied to a research study. These frequently flow through the physician to a hospital or research institution rather than to the physician personally.
- Regeneron$11K
General payments by program year
Who reported the general payments
Companies are grouped under their corporate parent — a single manufacturer often files under several CMS reporting entities. Research and ownership payments are counted separately and are not in this table.
| Company | Payments | Total |
|---|---|---|
| Merck | 125 | $6,828,595 |
| Regeneron | 45 | $331,784 |
| Ascendis Pharma Endocrinology Inc | 8 | $145,492 |
| GSK | 29 | $142,376 |
| AVEO Pharmaceuticals, Inc. | 17 | $131,480 |
| Merck Healthcare Kgaa | 4 | $76,283 |
| Sanofi US Services Inc. | 1 | $35,285 |
| EMD Serono, Inc. | 6 | $31,121 |
| Organon | 1 | $9,515 |
| Regeneron Healthcare Solutions, Inc. | 14 | $8,402 |
| Biontech SE | 7 | $3,377 |
| Coherus Oncology, Inc. | 3 | $2,223 |
| Merck Kgaa | 1 | $690 |
| Stryker | 2 | $253 |
| Ipsen Biopharmaceuticals, Inc | 2 | $241 |
| Axogen | 1 | $71 |
| Tactile Systems Technology Inc | 1 | $49 |
| Caris MPI, Inc. | 1 | $34 |
| E.r. Squibb & Sons, L.L.C. | 1 | $14 |
How this compares
$7,747,285 in reported general payments places this provider in the 95th percentile of 29 medical oncology providers in South Carolina.
Medicare billing
What this is not: this is the amount Original Medicare Part B allowed for services this provider billed in 2024. It is not their income. It excludes Medicare Advantage — now more than half of all Medicare enrollment — along with Medicaid and all commercial insurance, and it is gross practice revenue before staff, rent, supplies and malpractice premiums. CMS also suppresses any figure covering ten or fewer patients, so low-volume providers appear smaller than they are.
Other medical oncology in Charleston
- Theodore GourdinCharleston$2.6M
- Gene SaylorsCharleston$1.1M
- Mariam AlexanderCharleston$833K
- Albert LockhartCharleston$821K
- Frank BresciaCharleston$664K
- Toros DincmanCharleston$570K
- Michael LillyCharleston$472K
- Kevin BeckerCharleston$365K
- Paul ObrienCharleston$167K
- Carolyn BrittenCharleston$162K
Where these figures come from
- Payments: CMS Open Payments, program years 2019–2025 (publication P06302026_06032026).
- Billing: Medicare Physician & Other Practitioners, data year 2024. Original Medicare Part B only.
- Identity: NPPES NPI Registry, July 2026.