Eric Chen, MD
Neurological Surgery · Louisville, KYNPI 1841672276
Payments from drug & device makers
What this record shows
This record is dominated by travel and lodging: $4,524 of the $7,419 with a category attached, or 61.0%. 22 manufacturers reported payments, led by Medtronic at 47.0% of the total.
Across 84 payments — averaging $88.32 each. Meals, travel, consulting and speaking fees, gifts and royalties reported by drug and device makers.
- Medtronic$3K
- Globus Medical$3K
- Integra Lifesciences Corporation$307
- Johnson & Johnson$231
- Stryker$172
- EMD Serono, Inc.$89
- plus $626 from 16 others
What the payments were for
- Travel & lodging$4,52461%
- Food & beverage$2,56835%
- Education$200%
- Other$3074%
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 |
|---|---|---|
| Medtronic(2 entities) | 33 | $3,484 |
| Globus Medical | 12 | $2,509 |
| Integra Lifesciences Corporation | 1 | $307 |
| Johnson & Johnson | 3 | $231 |
| Stryker | 2 | $172 |
| EMD Serono, Inc. | 4 | $89 |
| Takeda Pharmaceuticals U.S.A., Inc. | 4 | $86 |
| Eisai Inc. | 3 | $74 |
| Argenx US, Inc. | 4 | $66 |
| Kuros Biosciences USA, Inc | 1 | $53 |
| Livanova USA, Inc. | 2 | $47 |
| Vertex | 2 | $46 |
| Springworks Therapeutics, Inc. | 2 | $42 |
| Impel Pharmaceuticals LLC | 2 | $31 |
| TG Therapeutics, Inc. | 2 | $29 |
| UCB, Inc. | 1 | $28 |
| Teva Pharmaceuticals USA, Inc. | 1 | $27 |
| AstraZeneca | 1 | $26 |
| Catalyst Pharmaceuticals, Inc. | 1 | $22 |
| CSL Behring | 1 | $20 |
| Novartis | 1 | $17 |
| Lilly USA, LLC | 1 | $15 |
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.
How this compares
$7,419 in reported general payments places this provider in the 65th percentile of 99 neurological surgery providers in Kentucky.
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 |
|---|---|---|
| Gabapentin | 54 | $667 |
| Duloxetine Hcl | 26 | $391 |
| Methocarbamol | 31 | $333 |
| Hydrocodone-AcetaminophenHydrocodone/Acetaminophen | 36 | $171 |
Paid to pharmacies, not to this prescriber.
Other neurological surgery in Louisville
- Tom YaoLouisville$405K
- Joseph NeimatLouisville$196K
- Maria KoutourousiouLouisville$189K
- Shervin DashtiLouisville$146K
- Shawn AdamsLouisville$73K
- Nathaniel ToopLouisville$56K
- Thomas AltstadtLouisville$36K
- Brian WilliamsLouisville$33K
- Ajmal ZemmarLouisville$32K
- Redi RahmaniLouisville$29K
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.