Matthias Weiss, MD
Hematology & Oncology · la Crosse, WINPI 1245336759
Payments from drug & device makers
What this record shows
Almost everything reported here is food and beverage — 100.0% of the total across 6 separate payments, which is the pattern of a clinician who attends manufacturer presentations rather than one with a consulting arrangement. Reporting peaked in 2024 at $249 and has fallen 58.5% since, to $103 in 2025. That places this record below the midpoint for hematology & oncology clinicians in WI, where the typical reported total is $411.
Across 6 payments — averaging $72.19 each. Meals, travel, consulting and speaking fees, gifts and royalties reported by drug and device makers.
- Tempus AI, Inc$249
- ADC Therapeutics America, Inc.$184
Across 46 payments — averaging $5334.49 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.
- AstraZeneca$116K
- Astrazeneca UK Limited$55K
- Bristol Myers Squibb$33K
- Mirati Therapeutics, Inc.$23K
- Jazz Pharmaceuticals Inc.$18K
- E.r. Squibb & Sons, L.L.C.$290
What the payments were for
- Food & beverage$433100%
Most of this is food and beverage — typically meals provided during product presentations at a clinic or hospital. Nationally that is the single largest category of reported payments by count.
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 |
|---|---|---|
| Tempus AI, Inc | 4 | $249 |
| ADC Therapeutics America, Inc. | 2 | $184 |
How this compares
$433 in reported general payments places this provider in the 50th 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 la Crosse
- Benjamin Parsonsla Crosse$62K
- Reggie Thomesla Crosse$12K
- Parameswaran HariMilwaukee$1.3M
- Sayed Mehdi HamadaniMilwaukee$546K
- Binod DhakalMilwaukee$535K
- Deepak KilariMilwaukee$359K
- Ehab AtallahMilwaukee$344K
- Nirav ShahMilwaukee$207K
- Razelle KurzrockMilwaukee$199K
- Syed AbutalibMilwaukee$154K
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.