GlassScriptPhysician profile
Zar C Chan
NPI 1417243890
$1,700.63
in general payments reported to CMS, 2019-2025
17 companies · $627 in 2025
The $627 reported for 2025 was more than what a typical Nephrology (Internal Medicine) provider received nationally (typical 2025 total: $311).
Payments by year
General payments by program year, as reported to CMS.
General payments by year: 2020: $15.14 · 2022: $22.89 · 2023: $271 · 2024: $765 · 2025: $627.
What the payments were for
Nature of payment as categorized by the reporting companies: meals, consulting, travel, and so on.
Food and Beverage: $1,663.
View as a table
| Payment type | Amount (2023-2025) |
|---|---|
| Food and Beverage | $1,662.60 |
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 |
|---|---|---|---|
| Bayer Healthcare Pharmaceuticals INC. | $436.45 | 2024-2025 | |
| Astrazeneca Pharmaceuticals LP | $243.75 | 2024-2025 | Lokelma, Farxiga |
| Otsuka America Pharmaceutical, INC. | $221.98 | 2022-2025 | Jynarque |
| Travere Therapeutics, INC. | $124.99 | 2023 | |
| Aurinia Pharma U.S., INC. | $123.52 | 2023-2025 | Lupkynis |
| Ardelyx, INC. | $98.36 | 2024 | Ibsrela |
| Horizon Therapeutics Plc | $74.80 | 2023 | Krystexxa |
| Vifor Pharma, INC. | $67.84 | 2024-2025 | Veltassa |
| Fresenius USA Marketing, INC. | $56.65 | 2024 | Velphoro |
| Novartis Pharmaceuticals Corporation | $53.10 | 2024-2025 | |
| Amgen INC. | $49.39 | 2024-2025 | Krystexxa |
| Abiomed | $31.44 | 2025 | |
| Alexion Pharmaceuticals, INC. | $28.72 | 2025 | Ultomiris |
| Calliditas Therapeutics US INC. | $28.55 | 2025 | Tarpeyo |
| Boehringer Ingelheim Pharmaceuticals, INC. | $25.99 | 2025 | Jardiance |
Show all 17 companies
| Company | General payments | Years | Top products |
|---|---|---|---|
| Opko Pharmaceuticals, LLC | $19.96 | 2024 | Rayaldee |
| Melinta Therapeutics, LLC | $15.14 | 2020 |
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 Zar Chan 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.