Margaret Macdowell, MD
Radiation Oncology · Charleston, SCNPI 1437123288
Payments from drug & device makers
What this record shows
Almost everything reported here is food and beverage — 100.0% of the total across 52 separate payments, which is the pattern of a clinician who attends manufacturer presentations rather than one with a consulting arrangement. It is spread thinly across 20 manufacturers, the largest accounting for just 17.3% — the pattern of someone who eats at a lot of different presentations. Reporting peaked in 2021 at $370 and has fallen 68.2% since, to $118 in 2025.
Across 52 payments — averaging $21.65 each. Meals, travel, consulting and speaking fees, gifts and royalties reported by drug and device makers.
- Merck$194
- Bayer$132
- AstraZeneca$113
- GSK$108
- Medtronic$98
- Siemens Medical Solutions USA, Inc.$74
- plus $406 from 14 others
What the payments were for
- Food & beverage$1,126100%
Most of this is food and beverage — typically meals provided during product presentations at a clinic or hospital. Nationally that is the single largest category of reported payments by count.
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 | 9 | $194 |
| Bayer | 9 | $132 |
| AstraZeneca | 7 | $113 |
| GSK | 1 | $108 |
| Medtronic(2 entities) | 5 | $98 |
| Siemens Medical Solutions USA, Inc. | 2 | $74 |
| Boston Scientific | 2 | $59 |
| Boehringer Ingelheim | 2 | $52 |
| Novartis | 2 | $38 |
| Sanofi | 2 | $37 |
| Bioprotect Medical, Inc. | 1 | $31 |
| Johnson & Johnson | 2 | $30 |
| Teleflex LLC | 1 | $28 |
| Novocure Inc. | 1 | $23 |
| Palette Life Sciences, Inc. | 1 | $21 |
| Kyowa Kirin, Inc. | 1 | $20 |
| E.r. Squibb & Sons, L.L.C. | 1 | $19 |
| Myovant Sciences Inc. | 1 | $19 |
| Mylan Institutional Inc. | 1 | $16 |
| Tactile Systems Technology Inc | 1 | $14 |
How this compares
$1,126 in reported general payments places this provider in the 70th percentile of 72 radiation 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 radiation oncology in Charleston
- Clinton MedberyCharleston$37K
- Brian LallyCharleston$29K
- David MarshallCharleston$8K
- Stephen RameyCharleston$1K
- Harriet Eldredge HindyCharleston$924
- Stephanie MyersCharleston$785
- Bradley DepaoliCharleston$763
- Samuel CooperCharleston$637
- Vincent GrzywaczCharleston$574
- Anand SharmaCharleston$563
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.