William Small, MD
Radiation Oncology · Chicago, ILNPI 1336115013
Payments from drug & device makers
What this record shows
The money is spread across several categories — consulting fees (43.1%), speaking fees and food and beverage — rather than concentrated in one kind of arrangement. It is spread thinly across 14 manufacturers, the largest accounting for just 21.1%. Among radiation oncology clinicians in IL with any reported payments, this total sits in the top 5% — high for the specialty, which is a reason to read the composition above rather than the number alone.
Across 146 payments — averaging $370.21 each. Meals, travel, consulting and speaking fees, gifts and royalties reported by drug and device makers.
- Carl Zeiss Meditec, Inc.$11K
- Varian Medical Systems, Inc.$9K
- Siemens Medical Solutions USA, Inc.$7K
- Novocure Inc.$7K
- Merck$6K
- Carl Zeiss Meditec USA, Inc.$5K
- plus $8K from 8 others
Across 6 payments — averaging $4652.65 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.
- Novocure Inc.$28K
What the payments were for
- Consulting fees$23,30843%
- Speaking & faculty fees$17,13532%
- Travel & lodging$4,7809%
- Food & beverage$8,82816%
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 |
|---|---|---|
| Carl Zeiss Meditec, Inc. | 24 | $11,402 |
| Varian Medical Systems, Inc. | 24 | $9,366 |
| Siemens Medical Solutions USA, Inc. | 26 | $7,433 |
| Novocure Inc. | 6 | $7,168 |
| Merck | 8 | $5,804 |
| Carl Zeiss Meditec USA, Inc. | 16 | $4,864 |
| GSK | 2 | $2,400 |
| Viewray Technologies Inc | 13 | $1,655 |
| Reflexion Medical, Inc. | 13 | $1,225 |
| Bristol Myers Squibb | 1 | $1,000 |
| Elekta, Inc. | 6 | $790 |
| Accuray Incorporated | 5 | $560 |
| Histosonics, Inc. | 1 | $257 |
| Omniscient Neurotechnology America Ltd | 1 | $127 |
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.
- INTRABEAM$8,118
- IORT$6,888
- TrueBeam$4,052
- Edge$2,000
- Other$2,000
- MRIdian$1,185
- ELEKTA MEDICAL LINEAR ACCELERATOR$1,064
- REFLEXION MEDICAL RADIOTHERAPY SYSTEM$1,008
- Varian Ethos Treatment Planning$781
- KEYTRUDA$711
- INTRABEAM 600$671
- Treatment Planning Systems$611
- MRIdian LINAC$383
- TomoTherapy System$230
- Varian Treatment$197
- Tomo Therapy System$167
- Clarity$133
- Quicktome$127
- ELEKTA UNITY$126
- Halcyon$126
How this compares
$54,051 in reported general payments places this provider in the 95th percentile of 242 radiation oncology providers in Illinois.
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 radiation oncology in Chicago
- Sean PitrodaChicago$103K
- Aditya JulooriChicago$73K
- Steven ChmuraChicago$59K
- Ken TatebeChicago$42K
- Sean SachdevChicago$34K
- Yasmin HasanChicago$18K
- Ralph WeichselbaumChicago$11K
- Tarita ThomasChicago$8K
- Gaurav MarwahaChicago$6K
- Dian WangChicago$5K
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.