Lillian de Leon, MD
Internal Medicine · Chicago, ILNPI 1134142193
Payments from drug & device makers
Across 418 payments — averaging $20.38 each. Meals, travel, consulting and speaking fees, gifts and royalties reported by drug and device makers.
- GSK$1K
- Lilly USA, LLC$1K
- AstraZeneca$884
- Amgen$716
- Pfizer$665
- Johnson & Johnson$597
- plus $3K from 23 others
What the payments were for
- Food & beverage$8,483100%
- Education$350%
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 |
|---|---|---|
| GSK | 58 | $1,181 |
| Lilly USA, LLC | 51 | $1,080 |
| AstraZeneca | 45 | $884 |
| Amgen | 42 | $716 |
| Pfizer | 26 | $665 |
| Johnson & Johnson | 26 | $597 |
| Bayer | 23 | $563 |
| Boehringer Ingelheim | 16 | $446 |
| Novo Nordisk | 22 | $418 |
| Novartis | 16 | $367 |
| E.r. Squibb & Sons, L.L.C. | 11 | $250 |
| Merck | 25 | $215 |
| Sanofi-aventis U.S. LLC | 6 | $132 |
| Amarin Pharma, Inc. | 8 | $125 |
| Esperion Therapeutics, Inc. | 6 | $119 |
| Xeris Pharmaceuticals, Inc. | 5 | $112 |
| Exact Sciences | 5 | $106 |
| Sunovion Pharmaceuticals Inc. | 3 | $103 |
| ZOLL Services LLC (a/k/a ZOLL Lifecor Corp) | 6 | $87 |
| AbbVie(2 entities) | 3 | $75 |
| Salix Pharmaceuticals, A Division Of Bausch Health US, LLC | 4 | $56 |
| Shield Therapeutics Inc | 3 | $53 |
| Radius Health, Inc. | 2 | $42 |
| Edwards Lifesciences | 1 | $28 |
| VBI Vaccine (delaware) Inc. | 1 | $22 |
| Astellas Pharma US Inc | 1 | $21 |
| Fresenius USA Marketing, Inc. | 1 | $19 |
| Ironwood Pharmaceuticals, Inc | 1 | $18 |
| Teva Pharmaceuticals USA, Inc. | 1 | $17 |
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.
- ELIQUIS$214
How this compares
$8,518 in reported general payments places this provider in the 90th percentile of 5,182 internal medicine providers in Illinois.
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 |
|---|---|---|
| FarxigaDapagliflozin Propanediol | 144 | $127,595 |
| Trelegy ElliptaFluticasone/Umeclidin/Vilanter | 111 | $102,953 |
| EliquisApixaban | 82 | $92,777 |
| KerendiaFinerenone | 76 | $80,386 |
| JardianceEmpagliflozin | 53 | $77,726 |
| JanuviaSitagliptin Phosphate | 46 | $56,314 |
| OzempicSemaglutide | 51 | $52,138 |
| LinzessLinaclotide | 61 | $47,652 |
| MounjaroTirzepatide | 33 | $42,236 |
| TradjentaLinagliptin | 42 | $38,110 |
| TrulicityDulaglutide | 31 | $33,529 |
| ProliaDenosumab | 14 | $24,168 |
| XareltoRivaroxaban | 17 | $15,163 |
| VascepaIcosapent Ethyl | 16 | $12,357 |
| Repatha SyringeEvolocumab | 17 | $9,332 |
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 |
|---|---|---|
| AstraZenecaFarxiga | $884 | $127,595144 claims |
| Boehringer IngelheimJardiance, Tradjenta | $446 | $115,83695 claims |
| GSKTrelegy Ellipta, Arnuity Ellipta | $1,181 | $106,942131 claims |
| PfizerEliquis | $665 | $92,77782 claims |
| BayerKerendia | $563 | $80,38676 claims |
| Lilly USA, LLCMounjaro, Trulicity | $1,080 | $75,76564 claims |
| MerckJanuvia | $215 | $56,31446 claims |
| Novo NordiskOzempic | $418 | $52,13851 claims |
| AbbVieLinzess | $75 | $47,65261 claims |
| AmgenProlia | $716 | $24,16814 claims |
| Johnson & JohnsonXarelto | $597 | $15,16317 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 90th percentile of 5,182 internal medicine providers in Illinois.
Other internal medicine in Chicago
- Dennis LevinsonChicago$25.3M
- Danny SugimotoChicago$4M
- Peter O DonnellChicago$3.9M
- Daniel CatenacciChicago$3.5M
- Patricia WalshChicago$2.1M
- Merle DiamondChicago$1.7M
- Mohammed KassemChicago$1.3M
- David BakerChicago$1M
- Azazuddin AhmedChicago$912K
- Daniel BergerChicago$861K
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.