Brian Williams, MD
Neurological Surgery · Louisville, KYNPI 1548436660
Payments from drug & device makers
What this record shows
This record is dominated by speaking fees: $21,191 of the $33,442 with a category attached, or 63.4%. Collagen Matrix, Inc accounts for 72.6% of it on its own, with 22 other manufacturers making up the rest. Reporting peaked in 2022 at $21,358 and has fallen 90.0% since, to $2,130 in 2025.
Across 95 payments — averaging $352.02 each. Meals, travel, consulting and speaking fees, gifts and royalties reported by drug and device makers.
- Collagen Matrix, Inc$24K
- Novocure Inc.$3K
- Medtronic$3K
- GT Medical Technologies, Inc$1K
- Lilly USA, LLC$375
- Surgical Theater. Inc.$360
- plus $2K from 17 others
Across 99 payments — averaging $782.64 each. Payments tied to a research study. These frequently flow through the physician to a hospital or research institution rather than to the physician personally.
- GT Medical Technologies, Inc$42K
- Monteris Medical Corporation$36K
What the payments were for
- Consulting fees$5,57217%
- Speaking & faculty fees$21,19163%
- Travel & lodging$1,6445%
- Food & beverage$5,03515%
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 |
|---|---|---|
| Collagen Matrix, Inc | 2 | $24,262 |
| Novocure Inc. | 14 | $2,888 |
| Medtronic(2 entities) | 29 | $2,575 |
| GT Medical Technologies, Inc | 20 | $1,029 |
| Lilly USA, LLC | 1 | $375 |
| Surgical Theater. Inc. | 1 | $360 |
| Cerapedics Inc. | 2 | $261 |
| Si-bone, Inc. | 4 | $244 |
| Johnson & Johnson | 3 | $221 |
| Globus Medical | 3 | $198 |
| Telix Pharmaceuticals | 1 | $141 |
| Zimmer Biomet | 1 | $133 |
| Monteris Medical Corporation | 1 | $130 |
| Esperion Therapeutics, Inc. | 1 | $125 |
| Abbott | 1 | $124 |
| DIXI Medical USA Corp | 1 | $103 |
| Stryker | 2 | $95 |
| Servier Pharmaceuticals LLC | 2 | $46 |
| Azurity Pharmaceuticals, Inc. | 2 | $30 |
| Dendreon Pharmaceuticals LLC | 1 | $30 |
| Kls-martin L.p. | 1 | $28 |
| Jazz Pharmaceuticals Inc. | 1 | $28 |
| Kyowa Kirin, Inc. | 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.
- Oncology$2,635
- GammaTile$425
- ILLUCCIX$283
- STEALTHSTATION S8 PLATFORM$169
- I-FACTOR PEPTIDE ENHANCED BONE GRAFT$161
- Vivigen MIS Delivery System$159
- Excelsius - GPS$158
- STRATA$150
- Neuro Plating System$133
- Neuroblate$130
- NEXLIZET$125
- NEXLETOL$125
- FreeStyle Libre$124
- MINIMED 780G$106
How this compares
$33,442 in reported general payments places this provider in the 85th 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.
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
- Ajmal ZemmarLouisville$32K
- Redi RahmaniLouisville$29K
- Rodrigo Fernandez GajardoLouisville$24K
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.