Physician profile
Robert A Chang
NPI 1093712093
$2,957.94
in general payments reported to CMS, 2019-2025
37 companies · $313 in 2025
The $313 reported for 2025 was more than what a typical Internal Medicine provider received nationally (typical 2025 total: $156).
Payments by year
General payments by program year, as reported to CMS.
General payments by year: 2019: $654 · 2020: $111 · 2021: $365 · 2022: $269 · 2023: $555 · 2024: $691 · 2025: $313.
What the payments were for
Nature of payment as categorized by the reporting companies: meals, consulting, travel, and so on.
Food and Beverage: $1,559.
View as a table
| Payment type | Amount (2023-2025) |
|---|---|
| Food and Beverage | $1,558.99 |
Payment-type detail covers 2023-2025; earlier years are included in totals but not broken out here.
Who reported paying
General payments only, as reported to CMS. Product names cover 2023-2025.
| Company | General payments | Years | Top products |
|---|---|---|---|
| Amgen INC. | $833.56 | 2019-2025 | Repatha, Prolia, Evenity |
| Glaxosmithkline, LLC. | $239.39 | 2023-2025 | Arexvy, Shingrix |
| Boehringer Ingelheim Pharmaceuticals, INC. | $189.89 | 2019-2024 | Jardiance |
| Novo Nordisk INC | $179.26 | 2021-2025 | Wegovy, Ozempic, Rybelsus |
| Abbott Laboratories | $148.22 | 2019-2025 | Freestyle Libre 3 |
| Exact Sciences Corporation | $129.01 | 2023-2025 | Cologuard Collection Kit |
| Abbvie INC. | $123.92 | 2021-2024 | Linzess, Ubrelvy |
| Vifor Pharma, INC. | $109.57 | 2019-2021 | |
| Pfizer INC. | $95.19 | 2022-2025 | |
| Aimmune Therapeutics, INC. | $90.61 | 2024-2025 | Zenpep |
| Astrazeneca Pharmaceuticals Lp | $74.96 | 2019-2025 | Breztri, Airsupra |
| Sunovion Pharmaceuticals INC. | $63.14 | 2019 | |
| Nestle Healthcare Nutrition INC. | $57.49 | 2021-2023 | |
| Irhythm Technologies, INC. | $48.02 | 2023-2024 | Zio Xt Patch, Zio Monitor |
| Otsuka America Pharmaceutical, INC. | $46.62 | 2023-2024 | Abilify Asimtufii, Abilify Maintena, Rexulti |
Show all 37 companies
| Company | General payments | Years | Top products |
|---|---|---|---|
| Amarin Pharma, INC. | $45.85 | 2019-2021 | |
| Xeris Pharmaceuticals, INC. | $41.22 | 2024 | Gvoke Hypopen |
| Boston Scientific Corporation | $40.42 | 2022-2025 | Watchman Flx |
| Idorsia Pharmaceuticals US INC | $39.96 | 2022-2023 | Quviviq |
| Teva Pharmaceuticals USA, INC. | $38.33 | 2019 | |
| Astellas Pharma US INC | $33.81 | 2024 | Veozah |
| Dexcom, INC. | $31.54 | 2023 | Dexcom G6 Transmitter |
| Lilly USA, LLC | $27.37 | 2024-2025 | Zepbound, Mounjaro |
| Regeneron Healthcare Solutions, INC. | $26.38 | 2019 | |
| Grifols USA, LLC | $23.91 | 2019 | |
| Daiichi Sankyo INC. | $18.94 | 2023 | Injectafer |
| Nevro Corp. | $18.77 | 2019 | |
| Takeda Pharmaceuticals U.S.A., INC. | $18.29 | 2021 | |
| Inogen, INC. | $17.48 | 2023 | Inogen |
| Silk Road Medical, INC. | $15.80 | 2023 | Enroute Transcarotid Neuroprotection System, Enroute Transcarotid Stent |
| Merck Sharp & Dohme LLC | $15.46 | 2024 | Gardasil 9, Gardasil, Capvaxive |
| Radius Health, INC. | $14.96 | 2019 | |
| Advanced Respiratory, INC | $13.56 | 2020 | |
| Novartis Pharmaceuticals Corporation | $13.50 | 2022 | |
| Electromed, INC. | $11.29 | 2019 | |
| Sanofi-Aventis U.S. LLC | $11.26 | 2020 | |
| Mallinckrodt Enterprises LLC | $10.99 | 2019 |
Drugs and devices associated with these payments
CMS records which products a payment was associated with, not how the money was allocated. Association is not allocation: one payment can be associated with several products, and a product listing does not mean the payment was made because of that product. Product detail covers 2023-2025.
If you want to bring it up
Most clinicians are glad to talk about this. A respectful way in:
- "I saw Robert Chang listed in the CMS Open Payments database. Can you tell me about your work with those companies?"
- "Is there a generic or alternative to this medication, and would it work as well for me?"
- "What made you choose this particular treatment for my situation?"
These are normal questions. A good clinician will welcome them.
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Source: CMS Open Payments, program years 2019-2025, as reported to CMS by drug and device makers (published June 30, 2026). Drug and device detail covers 2023-2025.