Khalid Kahook, MD
Retina Specialist · Neenah, WINPI 1356640726
Payments from drug & device makers
What this record shows
This record is dominated by food and beverage: $189 of the $220 with a category attached, or 85.6%. Regeneron Healthcare Solutions, Inc. accounts for 68.1% of it on its own, with 3 other manufacturers making up the rest. That places this record below the midpoint for retina specialist clinicians in WI, where the typical reported total is $1,150.
Across 12 payments — averaging $18.37 each. Meals, travel, consulting and speaking fees, gifts and royalties reported by drug and device makers.
- Regeneron Healthcare Solutions, Inc.$150
- AbbVie$38
- Apellis Pharmaceuticals, Inc.$17
- Bausch & Lomb, A Division Of Bausch Health US, LLC$15
What the payments were for
- Food & beverage$18986%
- Education$3214%
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 |
|---|---|---|
| Regeneron Healthcare Solutions, Inc. | 7 | $150 |
| AbbVie | 3 | $38 |
| Apellis Pharmaceuticals, Inc. | 1 | $17 |
| Bausch & Lomb, A Division Of Bausch Health US, LLC | 1 | $15 |
How this compares
$220 in reported general payments places this provider in the 20th percentile of 24 retina specialist providers in Wisconsin.
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 |
|---|---|---|
| Prednisolone Acetate | 36 | $1,914 |
| Difluprednate | 16 | $1,303 |
| Dorzolamide-TimololDorzolamide Hcl/Timolol Maleat | 41 | $572 |
| Ketorolac Tromethamine | 16 | $358 |
| Dorzolamide Hcl | 22 | $347 |
| Brimonidine Tartrate | 30 | $266 |
| Latanoprost | 32 | $199 |
Paid to pharmacies, not to this prescriber.
Other retina specialist in Neenah
- Rajeev BuddiNeenah$8K
- John RosculetNeenah$8K
- Charles HejnyNeenah$3K
- Jennifer AdeghateMilwaukee$52K
- Lincoln ShawMilwaukee$14K
- Clinton WarrenKenosha$5K
- Nicholas TosiMilwaukee$5K
- Wei Chuan WangGreen Bay$3K
- Benjamin ErnstAppleton$3K
- Ryan VogelGreenfield$3K
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.