Benjamin Zwain, DO
Neurology · Greenville, SCNPI 1306307103
Payments from drug & device makers
What this record shows
This record is dominated by food and beverage: $1,116 of the $1,291 with a category attached, or 86.4%. It is spread thinly across 17 manufacturers, the largest accounting for just 23.1% — the pattern of someone who eats at a lot of different presentations. Reporting peaked in 2023 at $610 and has fallen 71.3% since, to $175 in 2025.
Across 47 payments — averaging $27.46 each. Meals, travel, consulting and speaking fees, gifts and royalties reported by drug and device makers.
- AstraZeneca$298
- UCB, Inc.$138
- Neurelis, Inc.$120
- AbbVie$110
- Lundbeck LLC$98
- Teva Pharmaceuticals USA, Inc.$98
- plus $429 from 11 others
What the payments were for
- Consulting fees$17514%
- Food & beverage$1,11686%
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 |
|---|---|---|
| AstraZeneca(2 entities) | 4 | $298 |
| UCB, Inc. | 5 | $138 |
| Neurelis, Inc. | 5 | $120 |
| AbbVie | 6 | $110 |
| Lundbeck LLC | 5 | $98 |
| Teva Pharmaceuticals USA, Inc. | 5 | $98 |
| Amgen | 4 | $78 |
| SK Life Science, Inc. | 2 | $59 |
| EMD Serono, Inc. | 3 | $59 |
| Octapharma USA, Inc. | 1 | $52 |
| Medtronic | 1 | $36 |
| Takeda Pharmaceuticals U.S.A., Inc. | 1 | $34 |
| ANI Pharmaceuticals, Inc. | 1 | $31 |
| Eisai Inc. | 1 | $21 |
| Otsuka America Pharmaceutical, Inc. | 1 | $21 |
| Pfizer | 1 | $20 |
| Biohaven Pharmaceutical Holding Company Ltd. | 1 | $18 |
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.
- ULTOMIRIS$175
How this compares
$1,291 in reported general payments places this provider in the 55th percentile of 270 neurology 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 neurology in Greenville
- Mary HughesGreenville$404K
- Fredy RevillaGreenville$208K
- Kathleen WoschkolupGreenville$97K
- Sandip JainGreenville$43K
- John AbsherGreenville$30K
- Amber StutzGreenville$26K
- John PorterGreenville$17K
- Brian ThompsonGreenville$11K
- John BakerSumter$779K
- Robert CarlileSummerville$428K
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.