Charles Knudson, MD
Blood Banking & Transfusion Medicine · Iowa City, IANPI 1144218926
Payments from drug & device makers
What this record shows
This record is dominated by speaking fees: $4,510 of the $4,844 with a category attached, or 93.1%. Terumo BCT, Inc. accounts for 93.1% of it on its own, with 1 other manufacturer making up the rest.
Across 4 payments — averaging $1210.95 each. Meals, travel, consulting and speaking fees, gifts and royalties reported by drug and device makers.
- Terumo BCT, Inc.$5K
- Sanofi$334
Across 15 payments — averaging $14,568 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.
- Terumo BCT, Inc.$219K
What the payments were for
- Speaking & faculty fees$4,51093%
- Food & beverage$3347%
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 |
|---|---|---|
| Terumo BCT, Inc. | 1 | $4,510 |
| Sanofi | 3 | $334 |
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.
- Trima Accel$4,510
- ENJAYMO$142
- CABLIVI$142
How this compares
Too few blood banking & transfusion medicine providers in Iowato place this figure against a meaningful peer group, so we don't.
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 blood banking & transfusion medicine in Iowa City
- John BlauIowa City$123
- Meredith ParsonsIowa City$47
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.