Katherine Macmillan, MD
Gastroenterology · Simpsonville, SCNPI 1780117416
Payments from drug & device makers
Across 57 payments — averaging $86.55 each. Meals, travel, consulting and speaking fees, gifts and royalties reported by drug and device makers.
- Boston Scientific$3K
- Ovesco Endoscopy USA, Inc.$429
- Johnson & Johnson$220
- AbbVie$197
- ERBE USA Inc$158
- Enterra Medical, Inc.$88
- plus $469 from 14 others
What the payments were for
- Travel & lodging$3,23566%
- Food & beverage$1,69834%
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 |
|---|---|---|
| Boston Scientific | 16 | $3,371 |
| Ovesco Endoscopy USA, Inc. | 1 | $429 |
| Johnson & Johnson(2 entities) | 7 | $220 |
| AbbVie | 6 | $197 |
| ERBE USA Inc | 1 | $158 |
| Enterra Medical, Inc. | 1 | $88 |
| Sanofi | 3 | $78 |
| Takeda Pharmaceuticals U.S.A., Inc. | 4 | $69 |
| Ardelyx, Inc. | 3 | $66 |
| Ipsen Biopharmaceuticals, Inc | 2 | $49 |
| Pfizer | 3 | $37 |
| Mallinckrodt Hospital Products Inc. | 1 | $29 |
| Madrigal Pharmaceuticals | 1 | $24 |
| E.r. Squibb & Sons, L.L.C. | 2 | $23 |
| AstraZeneca | 1 | $17 |
| Aimmune Therapeutics, Inc. | 1 | $17 |
| Gilead | 1 | $16 |
| Phathom Pharmaceuticals, Inc. | 1 | $15 |
| Merit Medical Systems Inc | 1 | $15 |
| ZOLL Services LLC (a/k/a ZOLL Lifecor Corp) | 1 | $13 |
What the payments were tied to
Products named in the reported payments. Only payments of $100 or more are attributed here — the typical reported payment nationally is a meal worth about $16, and listing those product-by-product would be noise.
- ORISE$1,804
- OverStitch Endoscopic Suturing System$907
- GENERAL - THERAPIES$483
- VIO3$158
- Tremfya$144
How this compares
$4,934 in reported general payments places this provider in the 60th percentile of 259 gastroenterology 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 gastroenterology in Simpsonville
- James KoppAnderson$2.3M
- Erin ForsterCharleston$2M
- Suzy KimGreenville$1.5M
- Narayanachar MuraliOrangeburg$1.4M
- Brett van Leer GreenbergSummerville$1.1M
- Edward KimbroughColumbia$1M
- Gary AbramsGreenville$925K
- Mark DeleggeCharleston$578K
- Matthew BarnesGreenville$565K
- Brenda HoffmanCharleston$433K
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.