Earl Troup, MD
Neurological Surgery · Greenville, SCNPI 1326085903
Payments from drug & device makers
What this record shows
This record is dominated by travel and lodging: $1,740 of the $2,843 with a category attached, or 61.2%. 14 manufacturers reported payments, led by Peerless Surgical Inc. at 39.9% of the total. Reporting peaked in 2024 at $1,778 and has fallen 79.6% since, to $362 in 2025. That places this record below the midpoint for neurological surgery clinicians in SC, where the typical reported total is $2,843.
Across 42 payments — averaging $67.69 each. Meals, travel, consulting and speaking fees, gifts and royalties reported by drug and device makers.
- Peerless Surgical Inc.$1K
- Arthrex$521
- Riwospine, Inc.$260
- Medtronic$248
- Abbott$184
- Saol Therapeutics Inc.$165
- plus $329 from 8 others
What the payments were for
- Travel & lodging$1,74061%
- Food & beverage$1,10339%
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 |
|---|---|---|
| Peerless Surgical Inc. | 7 | $1,136 |
| Arthrex | 4 | $521 |
| Riwospine, Inc. | 2 | $260 |
| Medtronic | 5 | $248 |
| Abbott | 3 | $184 |
| Saol Therapeutics Inc. | 8 | $165 |
| Globus Medical | 2 | $85 |
| Boston Scientific | 2 | $71 |
| Livanova USA, Inc. | 3 | $57 |
| Stryker | 2 | $40 |
| Integra Lifesciences Corporation | 1 | $33 |
| Atricure, Inc. | 1 | $17 |
| Lemaitre Vascular, Inc. | 1 | $14 |
| Longeviti Neuro Solutions Inc | 1 | $11 |
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.
- Spine$172
- PENTA$150
- INTELLIS ADAPTIVESTIM$130
How this compares
$2,843 in reported general payments places this provider in the 50th percentile of 114 neurological surgery 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.
Most prescribed under Part D
| Drug | Claims | Cost to plans & patients |
|---|---|---|
| Cyclobenzaprine Hcl | 15 | $126 |
| Hydrocodone-AcetaminophenHydrocodone/Acetaminophen | 13 | $95 |
Paid to pharmacies, not to this prescriber.
Other neurological surgery in Greenville
- Jan Vargas MachajGreenville$207K
- James WigintonGreenville$18K
- Tyler SparksGreenville$16K
- Christie MinaGreenville$13K
- Samuel AsanteGreenville$12K
- Phillip HodgeGreenville$10K
- Sharon WebbGreenville$5K
- Alejandro SpiottaCharleston$894K
- David JonesRock Hill$540K
- Sabino DagostinoLadson$425K
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.