Jeffrey Knox, MD
Obstetrics & Gynecology · Salina, KSNPI 1437114329
Payments from drug & device makers
What this record shows
Almost everything reported here is food and beverage — 95.7% of the total across 18 separate payments, which is the pattern of a clinician who attends manufacturer presentations rather than one with a consulting arrangement. 10 manufacturers reported payments, led by AbbVie at 29.6% of the total. Reporting peaked in 2021 at $112 and has fallen 67.4% since, to $36 in 2024. That places this record below the midpoint for obstetrics & gynecology clinicians in KS, where the typical reported total is $738.
Across 18 payments — averaging $17.90 each. Meals, travel, consulting and speaking fees, gifts and royalties reported by drug and device makers.
- AbbVie$95
- Merck$51
- Boston Scientific$35
- Intuitive Surgical$34
- Evofem Biosciences, Inc.$30
- Sumitomo Pharma America, Inc.$20
- plus $56 from 4 others
What the payments were for
- Food & beverage$30896%
- Education$144%
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 |
|---|---|---|
| AbbVie | 5 | $95 |
| Merck | 3 | $51 |
| Boston Scientific | 2 | $35 |
| Intuitive Surgical | 1 | $34 |
| Evofem Biosciences, Inc. | 2 | $30 |
| Sumitomo Pharma America, Inc. | 1 | $20 |
| Myovant Sciences Inc. | 1 | $16 |
| Hologic Sales And Service, LLC | 1 | $15 |
| Amgen | 1 | $14 |
| Medtronic | 1 | $11 |
How this compares
$322 in reported general payments places this provider in the 35th percentile of 302 obstetrics & gynecology providers in Kansas.
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 |
|---|---|---|
| MyrbetriqMirabegron | 12 | $6,301 |
| Estradiol | 216 | $3,388 |
| Clobetasol Propionate | 17 | $926 |
| Escitalopram Oxalate | 51 | $466 |
| Levothyroxine Sodium | 106 | $431 |
| Amitriptyline Hcl | 21 | $228 |
| Nitrofurantoin Mono-MacroNitrofurantoin Monohyd/M-Cryst | 18 | $200 |
| Zolpidem Tartrate | 19 | $192 |
| Potassium Chloride | 15 | $180 |
| Triamcinolone Acetonide | 25 | $178 |
| Atorvastatin Calcium | 23 | $166 |
| Bupropion Hcl SrBupropion Hcl | 17 | $161 |
| Simvastatin | 27 | $146 |
| Sertraline Hcl | 42 | $117 |
| Amlodipine Besylate | 25 | $97 |
Paid to pharmacies, not to this prescriber.
Other obstetrics & gynecology in Salina
- Christopher GraberSalina$4K
- David PrendergastSalina$3K
- Kimberly SwanOverland Park$123K
- Michael FenechPittsburg$65K
- Michael MageeShawnee Mission$28K
- Austin FindleyKansas City$18K
- Madhuri ReddyKansas City$13K
- Deshala CastilleEmporia$11K
- Christine SandersHutchinson$11K
- Zachary KuhlmannWichita$11K
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.