GlassScriptPhysician profile
William Wei-Ming Chang
NPI 1417902149
$14,701.78
in general payments reported to CMS, 2019-2025
49 companies · $2,777 in 2025
The $2,777 reported for 2025 was more than what 82% of Pulmonary Disease providers received nationally (typical 2025 total: $500).
Payments by year
General payments by program year, as reported to CMS.
General payments by year: 2019: $3,254 · 2020: $910 · 2021: $1,771 · 2022: $1,575 · 2023: $2,375 · 2024: $2,040 · 2025: $2,777.
What the payments were for
Nature of payment as categorized by the reporting companies: meals, consulting, travel, and so on.
Food and Beverage: $6,862 · Education: $329.
View as a table
| Payment type | Amount (2023-2025) |
|---|---|
| Food and Beverage | $6,862.41 |
| Education | $329.44 |
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 |
|---|---|---|---|
| Glaxosmithkline, LLC. | $3,332.51 | 2019-2025 | Trelegy Ellipta, Nucala, Arexvy |
| Boehringer Ingelheim Pharmaceuticals, INC. | $1,887.15 | 2019-2025 | Ofev, Stiolto Respimat, Spiriva Respimat |
| Astrazeneca Pharmaceuticals LP | $1,696.69 | 2019-2025 | Fasenra, Airsupra, Breztri |
| Insmed, INC. | $951.74 | 2019-2025 | Arikayce, Brinsupri |
| Genzyme Corporation | $708.26 | 2019-2025 | |
| Grifols USA, LLC | $561.39 | 2019-2025 | Prolastin-C Liquid |
| Harmony Biosciences LLC | $483.49 | 2020-2025 | Wakix |
| United Therapeutics Corporation | $464.50 | 2021-2025 | Tyvaso, Tyvaso |
| Regeneron Healthcare Solutions, INC. | $454.22 | 2019-2025 | Dupixent |
| Avadel Cns Pharmaceuticals, LLC | $442.13 | 2023-2025 | Lumryz |
| Genentech USA, INC. | $430.11 | 2019-2020 | |
| Jazz Pharmaceuticals INC. | $342.96 | 2019-2025 | |
| Philips North America LLC | $262.88 | 2019-2025 | Vest Therapy Und |
| Janssen Pharmaceuticals, INC | $262.01 | 2019-2021 | |
| Verona Pharma, INC. | $261.55 | 2025 | Ohtuvayre |
Show all 49 companies
| Company | General payments | Years | Top products |
|---|---|---|---|
| Vifor Pharma, INC. | $245.10 | 2024-2025 | Zemaira |
| Actelion Pharmaceuticals US, INC. | $235.74 | 2019-2025 | Uptravi, Opsumit |
| Mylan Specialty L.P. | $168.27 | 2019-2024 | Yupelri |
| Abbvie INC. | $97.77 | 2021-2025 | Avycaz |
| Ani Pharmaceuticals, INC. | $96.06 | 2025 | Purified Cortrophin Gel |
| Takeda Pharmaceuticals U.S.A., INC. | $88.32 | 2023 | Hyqvia, Cuvitru |
| Advanced Respiratory, INC | $88.23 | 2020 | |
| Axsome Therapeutics, INC. | $85.85 | 2024-2025 | Sunosi |
| Pfizer INC. | $81.93 | 2024-2025 | |
| Shire North American Group INC | $80.72 | 2019 | |
| Sanofi-Aventis U.S. LLC | $79.99 | 2023 | |
| Lilly USA, LLC | $78.82 | 2024-2025 | Zepbound, Jardiance |
| Pulmonx Corporation | $72.06 | 2020-2025 | Zephyr Delivery Catheter, Pulmonx Chartis Tablet Console, Zephyr Endobronchial Valve |
| Amgen INC. | $59.05 | 2022-2023 | Tezspire |
| E.R. Squibb & Sons, L.L.C. | $51.38 | 2019-2022 | |
| Mallinckrodt Hospital Products INC. | $47.37 | 2020-2022 | |
| Viatris Specialty LLC | $46.97 | 2025 | Yupelri |
| Exact Sciences Corporation | $46.06 | 2023-2024 | Cologuard Collection Kit |
| Ge Healthcare | $44.59 | 2025 | |
| Resmed Corp | $44.23 | 2025 | |
| Boston Scientific Corporation | $41.55 | 2021-2022 | |
| Novo Nordisk INC | $36.36 | 2019-2022 | |
| Covis Pharma Gmbh | $33.77 | 2023 | |
| Circassia INC. | $31.39 | 2019 | |
| Baxter Healthcare | $28.94 | 2023 | Hillrom - Life 2000 Ventilation System |
| Phadia US INC. | $21.55 | 2023 | Immunocap |
| Electromed, INC. | $20.35 | 2024 | Smartvest |
| Allergan, INC. | $19.21 | 2019 | |
| Vertical Pharmaceuticals, LLC | $17.19 | 2020 | |
| Cmp Pharma, INC. | $16.61 | 2024 | Tadliq, Carospir, Liqrev |
| Vertiflex, INC. | $14.76 | 2019 | |
| Sanofi Pasteur INC. | $13.89 | 2019 | |
| Bayer Healthcare Pharmaceuticals INC. | $13.20 | 2019 | |
| Endogastric Solutions, INC | $12.91 | 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 William 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.
Share this page
Keep an eye on this page
Get an email when the next June refresh changes this page. No account needed.
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.