Katherine Willingham, MD
Internal Medicine · Topeka, KSNPI 1245262435
Payments from drug & device makers
Across 313 payments — averaging $15,371 each. Meals, travel, consulting and speaking fees, gifts and royalties reported by drug and device makers.
- Eli Lilly$3.8M
- Merck$417K
- Pfizer$226K
- GSK$158K
- Regeneron$103K
- Genentech, Inc.$82K
- plus $930 from 13 others
Across 13 payments — averaging $1146.68 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.
- Eli Lilly$15K
What the payments were for
- Travel & lodging$61833%
- Food & beverage$1,25767%
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 |
|---|---|---|
| Eli Lilly | 101 | $3,824,070 |
| Merck | 8 | $416,874 |
| Pfizer | 55 | $225,997 |
| GSK | 27 | $157,947 |
| Regeneron | 34 | $103,282 |
| Genentech, Inc. | 20 | $82,064 |
| Lilly USA, LLC | 17 | $202 |
| AbbVie(2 entities) | 4 | $176 |
| Amgen | 16 | $160 |
| Novo Nordisk | 12 | $156 |
| Astellas Pharma US Inc | 6 | $73 |
| E.r. Squibb & Sons, L.L.C. | 3 | $39 |
| AstraZeneca | 3 | $38 |
| Radius Health, Inc. | 2 | $23 |
| Philips North America LLC | 1 | $16 |
| Boehringer Ingelheim | 1 | $14 |
| Sanofi-aventis U.S. LLC | 1 | $12 |
| Novartis | 1 | $12 |
| Mylan Specialty L.p. | 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.
- UBRELVY$125
How this compares
$4,811,164 in reported general payments places this provider in the 95th percentile of 705 internal medicine 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 |
|---|---|---|
| EliquisApixaban | 97 | $96,656 |
| MounjaroTirzepatide | 69 | $72,069 |
| XareltoRivaroxaban | 37 | $47,661 |
| OzempicSemaglutide | 36 | $45,398 |
| TrulicityDulaglutide | 28 | $31,817 |
| Repatha SureclickEvolocumab | 14 | $23,115 |
| MyrbetriqMirabegron | 52 | $15,922 |
| FarxigaDapagliflozin Propanediol | 11 | $15,313 |
| Breo ElliptaFluticasone/Vilanterol | 27 | $13,482 |
| Aimovig AutoinjectorErenumab-Aooe | 16 | $11,822 |
| Spiriva RespimatTiotropium Bromide | 14 | $11,401 |
| Advair HfaFluticasone Propion/Salmeterol | 24 | $10,956 |
| PremarinEstrogens, Conjugated | 16 | $7,187 |
| Budesonide-Formoterol FumarateBudesonide/Formoterol Fumarate | 25 | $6,967 |
| SynthroidLevothyroxine Sodium | 87 | $6,738 |
Paid to pharmacies, not to this prescriber.
Companies that both paid and supply prescribed drugs
These companies both reported payments to this provider and make drugs the provider prescribed under Medicare Part D in 2024. For most specialties this overlap is expected — a cardiologist who is paid by a cardiology drugmaker also treats heart disease. It is shown so the reader can see it, not because it implies anything on its own.
| Company | Paid to this provider | Part D cost of their drugs |
|---|---|---|
| PfizerEliquis, Premarin, Prempro, Paxlovid | $225,997 | $110,435145 claims |
| Lilly USA, LLCMounjaro, Trulicity | $202 | $103,88697 claims |
| Novo NordiskOzempic | $156 | $45,39836 claims |
| Astellas Pharma US IncMyrbetriq | $73 | $15,92252 claims |
| AstraZenecaFarxiga | $38 | $15,31311 claims |
| GSKBreo Ellipta | $157,947 | $13,48227 claims |
| Boehringer IngelheimSpiriva Respimat | $14 | $11,40114 claims |
| AbbVieSynthroid | $176 | $6,73887 claims |
Reading this fairly. The Part D column is what drug plans and patients paid pharmacies — this provider received none of it, and it reflects how many patients they treat and what those drugs cost. Against peers, this provider's reported payments sit in the 95th percentile of 705 internal medicine providers in Kansas.
Other internal medicine in Topeka
- Michael CoxTopeka$3.4M
- Scott TeeterTopeka$1.2M
- Martin KankamLeavenworth$63.4M
- Mark HamblinKansas City$5.2M
- Raed Al RajabiWestwood$4.5M
- Leslie SpikesKansas City$4.5M
- James RuhlmannHutchinson$2.8M
- Shadi HamdehKansas City$1.1M
- Kyle WorkKansas City$863K
- Jonathan JacobsOverland Park$827K
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.