Winnie Nhan, DO
Endocrinology, Diabetes & Metabolism · Glen Ellyn, ILNPI 1245681709
Payments from drug & device makers
Across 137 payments — averaging $17.63 each. Meals, travel, consulting and speaking fees, gifts and royalties reported by drug and device makers.
- Lilly USA, LLC$578
- Dexcom, Inc.$347
- Novo Nordisk$314
- Abbott$219
- Johnson & Johnson$125
- Boehringer Ingelheim$125
- plus $707 from 17 others
What the payments were for
- Food & beverage$2,415100%
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 |
|---|---|---|
| Lilly USA, LLC | 35 | $578 |
| Dexcom, Inc. | 19 | $347 |
| Novo Nordisk | 23 | $314 |
| Abbott | 11 | $219 |
| Johnson & Johnson | 1 | $125 |
| Boehringer Ingelheim | 7 | $125 |
| Amgen | 6 | $111 |
| Sanofi-aventis U.S. LLC | 5 | $90 |
| Tandem Diabetes Care, Inc. | 5 | $81 |
| Xeris Pharmaceuticals, Inc. | 4 | $68 |
| Insulet Corporation | 3 | $65 |
| Sequel Med Tech, LLC | 3 | $47 |
| AbbVie | 3 | $47 |
| Antares Pharma, Inc. | 2 | $38 |
| Pfizer | 2 | $27 |
| Medtronic | 1 | $21 |
| Amphastar Pharmaceuticals, Inc. | 1 | $19 |
| BETA Bionics, Inc. | 1 | $17 |
| AstraZeneca | 1 | $16 |
| Embecta Corp. | 1 | $16 |
| Amneal Pharmaceuticals LLC | 1 | $16 |
| Theracosbio, LLC | 1 | $15 |
| Radius Health, Inc. | 1 | $14 |
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.
- XARELTO$125
How this compares
$2,415 in reported general payments places this provider in the 65th percentile of 347 endocrinology, diabetes & metabolism providers in Illinois.
See all endocrinology, diabetes & metabolism 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 |
|---|---|---|
| OzempicSemaglutide | 262 | $461,834 |
| JardianceEmpagliflozin | 260 | $385,108 |
| MounjaroTirzepatide | 91 | $131,250 |
| Humulin R U-500 KwikpenInsulin Regular, Human | 23 | $110,798 |
| TrulicityDulaglutide | 55 | $85,380 |
| FarxigaDapagliflozin Propanediol | 56 | $77,598 |
| JanuviaSitagliptin Phosphate | 48 | $71,994 |
| Toujeo Max SolostarInsulin Glargine,hum.Rec.Anlog | 31 | $65,768 |
| Fiasp FlextouchInsulin Aspart (Niacinamide) | 32 | $54,004 |
| Lantus SolostarInsulin Glargine,hum.Rec.Anlog | 248 | $42,870 |
| Humalog Kwikpen U-100Insulin Lispro | 78 | $37,925 |
| Novolog FlexpenInsulin Aspart | 109 | $35,977 |
| Toujeo SolostarInsulin Glargine,hum.Rec.Anlog | 48 | $35,854 |
| TradjentaLinagliptin | 23 | $31,954 |
| Tresiba Flextouch U-100Insulin Degludec | 49 | $30,259 |
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 |
|---|---|---|
| Novo NordiskOzempic, Novolog | $314 | $467,406277 claims |
| Boehringer IngelheimJardiance, Tradjenta | $125 | $417,061283 claims |
| Lilly USA, LLCMounjaro, Trulicity | $578 | $216,630146 claims |
| AstraZenecaFarxiga | $16 | $77,59856 claims |
| Sanofi-aventis U.S. LLCLantus | $90 | $4,94319 claims |
| Amneal Pharmaceuticals LLCLevothyroxine Sodium | $16 | $4,127316 claims |
| AbbVieSynthroid | $47 | $81816 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 65th percentile of 347 endocrinology, diabetes & metabolism providers in Illinois.
Other endocrinology, diabetes & metabolism in Glen Ellyn
- Liana BillingsSkokie$3.4M
- Leon FogelfeldChicago$1.5M
- Grazia AleppoChicago$1.4M
- Wahid KassarChicago$884K
- Anthony PickLake Forest$665K
- Hiralal MaheshwariMcHenry$642K
- Wenyu HuangChicago$639K
- Babak PazookiJoliet$582K
- Silvana PannainChicago$575K
- Ammar BayrakdarEvergreen Park$517K
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.