Vincent Ma, MD
Hematology & Oncology · Madison, WINPI 1437530722
Payments from drug & device makers
Across 363 payments — averaging $3184.12 each. Meals, travel, consulting and speaking fees, gifts and royalties reported by drug and device makers.
- Y-mabs Therapeutics, Inc.$438K
- Seagen Inc.$281K
- Regeneron$267K
- Merck$66K
- Pfizer$57K
- Delcath Systems$18K
- plus $28K from 6 others
Across 10 payments — averaging $190.94 each. Payments tied to a research study. These frequently flow through the physician to a hospital or research institution rather than to the physician personally.
- Regeneron$2K
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 |
|---|---|---|
| Y-mabs Therapeutics, Inc. | 221 | $438,192 |
| Seagen Inc. | 20 | $280,975 |
| Regeneron | 76 | $267,218 |
| Merck | 3 | $66,472 |
| Pfizer | 6 | $57,043 |
| Delcath Systems | 20 | $18,065 |
| Genentech, Inc. | 3 | $15,958 |
| Incyte Corporation | 6 | $4,979 |
| E.r. Squibb & Sons, L.L.C. | 4 | $4,319 |
| Immunocore Limited | 2 | $2,030 |
| Partner Therapeutics, Inc. | 1 | $500 |
| Novartis | 1 | $86 |
How this compares
$1,155,837 in reported general payments places this provider in the 90th percentile of 248 hematology & oncology providers in Wisconsin.
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.
Other hematology & oncology in Madison
- Christos KyriakopoulosMadison$17.1M
- Ryan PorterMadison$6.1M
- Vaishalee KenkreMadison$3.9M
- Hamid EmamekhooMadison$2.6M
- Jeremy KratzMadison$1.6M
- Timothy SchmidtMadison$1.2M
- Saurabh RajguruMadison$944K
- Sam LubnerMadison$851K
- Elisavet PaplomataMadison$521K
- Sima Ehsani ChimehMadison$477K
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.