Vincent Ma, MD
Hematology & Oncology · Madison, WINPI 1437530722
Payments from drug & device makers
What this record shows
This record is dominated by consulting fees: $25,847 of the $37,357 with a category attached, or 69.2%. 8 manufacturers reported payments, led by Delcath Systems at 48.4% of the total. 2025 is the largest year on record at $16,081, more than ten times the $86 reported in 2019. Among hematology & oncology clinicians in WI with any reported payments, this total sits in the top 10% — high for the specialty, which is a reason to read the composition above rather than the number alone.
Across 41 payments — averaging $911.15 each. Meals, travel, consulting and speaking fees, gifts and royalties reported by drug and device makers.
- Delcath Systems$18K
- Regeneron$7K
- Incyte Corporation$5K
- E.r. Squibb & Sons, L.L.C.$4K
- Immunocore Limited$2K
- Partner Therapeutics, Inc.$500
- plus $138 from 2 others
Across 332 payments — averaging $3374.67 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.
- Y-mabs Therapeutics, Inc.$438K
- Seagen Inc.$281K
- Regeneron$262K
- Merck$66K
- Pfizer$57K
- Genentech, Inc.$16K
- plus $89 from 1 others
What the payments were for
- Consulting fees$25,84769%
- Travel & lodging$9,01424%
- Food & beverage$7932%
- Education$1,7035%
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 |
|---|---|---|
| Delcath Systems | 20 | $18,065 |
| Regeneron | 6 | $7,416 |
| Incyte Corporation | 6 | $4,979 |
| E.r. Squibb & Sons, L.L.C. | 3 | $4,230 |
| Immunocore Limited | 2 | $2,030 |
| Partner Therapeutics, Inc. | 1 | $500 |
| Novartis | 1 | $86 |
| Merck | 2 | $51 |
What the payments were tied to
Products named in the reported payments. Only payments of $100 or more are attributed here — the typical reported payment nationally is a meal worth about $16, and listing those product-by-product would be noise.
- Hepzato Kit$17,870
- LIBTAYO$7,416
- KIMMTRAK$2,000
- Leukine$500
How this compares
$37,357 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.
Most prescribed under Part D
| Drug | Claims | Cost to plans & patients |
|---|---|---|
| Pentoxifylline | 11 | $795 |
| SynthroidLevothyroxine Sodium | 12 | $750 |
| Oxycodone Hcl | 16 | $226 |
| Prochlorperazine Maleate | 15 | $208 |
| Potassium Chloride | 12 | $179 |
| Pantoprazole Sodium | 19 | $150 |
| Prednisone | 17 | $80 |
| Ondansetron Hcl | 12 | $76 |
| Lorazepam | 11 | $6 |
Paid to pharmacies, not to this prescriber.
Other hematology & oncology in Madison
- Priyanka PophaliMadison$32K
- Hamid EmamekhooMadison$23K
- Elisavet PaplomataMadison$21K
- Timothy SchmidtMadison$19K
- Sima Ehsani ChimehMadison$17K
- Kalyan Vara Ganesh NadimintiMadison$17K
- Christos KyriakopoulosMadison$16K
- Matthew BrunnerMadison$15K
- Lyndsey RunaasMadison$12K
- Michael FrontieraMadison$11K
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.