John Porter, MD
Neurology · Greenville, SCNPI 1487636999
Payments from drug & device makers
What this record shows
This record is dominated by speaking fees: $14,000 of the $17,498 with a category attached, or 80.0%. AbbVie accounts for 82.6% of it on its own, with 33 other manufacturers making up the rest. Reporting peaked in 2021 at $9,261 and has fallen 98.7% since, to $124 in 2024.
Across 191 payments — averaging $91.61 each. Meals, travel, consulting and speaking fees, gifts and royalties reported by drug and device makers.
- AbbVie$14K
- Novartis$642
- Biogen$403
- Amneal Pharmaceuticals LLC$241
- Avanir Pharmaceuticals, Inc.$213
- Teva Pharmaceuticals USA, Inc.$185
- plus $1K from 28 others
What the payments were for
- Consulting fees$3002%
- Speaking & faculty fees$14,00080%
- Food & beverage$3,16818%
- Education$300%
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 |
|---|---|---|
| AbbVie(2 entities) | 42 | $14,446 |
| Novartis | 47 | $642 |
| Biogen | 9 | $403 |
| Amneal Pharmaceuticals LLC | 12 | $241 |
| Avanir Pharmaceuticals, Inc. | 10 | $213 |
| Teva Pharmaceuticals USA, Inc. | 13 | $185 |
| Biohaven Pharmaceuticals, Inc. | 3 | $182 |
| Chiesi USA, Inc. | 2 | $124 |
| Medtronic | 1 | $124 |
| AstraZeneca(2 entities) | 5 | $85 |
| Amgen(2 entities) | 4 | $78 |
| EMD Serono, Inc. | 4 | $71 |
| Acadia Pharmaceuticals Inc | 4 | $61 |
| Lilly USA, LLC | 3 | $60 |
| Johnson & Johnson | 3 | $59 |
| SK Life Science, Inc. | 2 | $45 |
| Aquestive Therapeutics, Inc. | 2 | $43 |
| Akcea Therapeutics, Inc. | 2 | $41 |
| Xeris Pharmaceuticals, Inc. | 2 | $39 |
| Eisai Inc. | 2 | $32 |
| Genentech USA, Inc. | 1 | $31 |
| E.r. Squibb & Sons, L.L.C. | 2 | $30 |
| Grifols USA, LLC | 2 | $29 |
| Kyowa Kirin, Inc. | 2 | $28 |
| UCB, Inc. | 2 | $26 |
| Lundbeck LLC | 2 | $25 |
| CSL Behring | 1 | $23 |
| Livanova USA, Inc. | 1 | $22 |
| Banner Life Sciences, LLC | 1 | $20 |
| Biohaven Pharmaceutical Holding Company Ltd. | 1 | $20 |
| Tanabe Pharma America, Inc. | 1 | $18 |
| Arbor Pharmaceuticals, Inc. | 1 | $18 |
| Bristol Myers Squibb | 1 | $16 |
| MDD US Operations, LLC | 1 | $16 |
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.
- UBRELVY$12,485
- QULIPTA$2,675
- TYSABRI$300
- LINQ II$124
- NURTEC ODT$120
How this compares
$17,498 in reported general payments places this provider in the 85th 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
- Brian ThompsonGreenville$11K
- John BakerSumter$779K
- Robert CarlileSummerville$428K
- Jose CardenasAiken$216K
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.