Mark Chien
Internal Medicine · Chicago, ILNPI 1356374383
Payments from drug & device makers
Across 124 payments — averaging $21.99 each. Meals, travel, consulting and speaking fees, gifts and royalties reported by drug and device makers.
- Novo Nordisk$391
- Pfizer$295
- Amgen$256
- GSK$205
- Johnson & Johnson$199
- AbbVie$170
- plus $1K from 22 others
What the payments were for
- Food & beverage$2,727100%
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 |
|---|---|---|
| Novo Nordisk | 17 | $391 |
| Pfizer | 13 | $295 |
| Amgen(2 entities) | 13 | $256 |
| GSK | 10 | $205 |
| Johnson & Johnson | 8 | $199 |
| AbbVie | 7 | $170 |
| Merck | 8 | $153 |
| Exact Sciences | 5 | $129 |
| Lilly USA, LLC | 6 | $125 |
| Salix Pharmaceuticals, A Division Of Bausch Health US, LLC | 6 | $113 |
| Boehringer Ingelheim | 4 | $108 |
| Cleerly, Inc. | 2 | $86 |
| Corcept Therapeutics | 2 | $67 |
| Amneal Pharmaceuticals LLC | 3 | $64 |
| Ironwood Pharmaceuticals, Inc | 3 | $41 |
| AstraZeneca | 2 | $40 |
| Braintree Laboratories, Inc. | 2 | $37 |
| Bausch Health US, LLC | 2 | $36 |
| Takeda Pharmaceuticals U.S.A., Inc. | 2 | $33 |
| Otsuka America Pharmaceutical, Inc. | 1 | $28 |
| Seqirus USA Inc | 1 | $24 |
| ARS Pharmaceuticals Operations, Inc. | 1 | $24 |
| Astellas Pharma US Inc | 1 | $21 |
| Genentech USA, Inc. | 1 | $21 |
| Sanofi Pasteur Inc. | 1 | $19 |
| Shire North American Group Inc | 1 | $16 |
| Arbor Pharmaceuticals, Inc. | 1 | $16 |
| Metuchen Pharmaceuticals | 1 | $12 |
How this compares
$2,727 in reported general payments places this provider in the 85th percentile of 5,182 internal medicine providers in Illinois.
Most prescribed under Part D
| Drug | Claims | Cost to plans & patients |
|---|---|---|
| EliquisApixaban | 22 | $36,038 |
| JardianceEmpagliflozin | 12 | $19,909 |
| XareltoRivaroxaban | 14 | $19,170 |
| MounjaroTirzepatide | 12 | $15,171 |
| WegovySemaglutide | 11 | $14,862 |
| Hydrocodone-AcetaminophenHydrocodone/Acetaminophen | 44 | $3,024 |
| SynthroidLevothyroxine Sodium | 20 | $1,922 |
| Sertraline Hcl | 17 | $1,858 |
| Levothyroxine Sodium | 88 | $1,667 |
| Amlodipine Besylate | 120 | $1,575 |
| Losartan Potassium | 82 | $1,331 |
| Metoprolol Succinate | 77 | $1,313 |
| Atorvastatin Calcium | 122 | $1,286 |
| Lactated RingersRinger's Solution,lactated | 19 | $872 |
| Irbesartan | 46 | $824 |
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 | $295 | $36,03822 claims |
| Boehringer IngelheimJardiance | $108 | $19,90912 claims |
| Johnson & JohnsonXarelto | $199 | $19,17014 claims |
| Lilly USA, LLCMounjaro | $125 | $15,17112 claims |
| Novo NordiskWegovy | $391 | $14,86211 claims |
| AbbVieSynthroid | $170 | $1,92220 claims |
| Amneal Pharmaceuticals LLCLevothyroxine Sodium | $64 | $1,66788 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 85th 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).
- Identity: NPPES NPI Registry, July 2026.