Evan Thomas, PhD
Radiation Oncology · Winter Park, FLNPI 1447618350
Payments from drug & device makers
What this record shows
The money is spread across several categories — consulting fees (57.2%), speaking fees and travel and lodging — rather than concentrated in one kind of arrangement. Siemens Medical Solutions USA, Inc. accounts for 99.7% of it on its own, with 10 other manufacturers making up the rest. Reporting peaked in 2023 at $105,727 and has fallen 56.8% since, to $45,662 in 2025. Among radiation oncology clinicians in FL 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 184 payments — averaging $1138.47 each. Meals, travel, consulting and speaking fees, gifts and royalties reported by drug and device makers.
- Siemens Medical Solutions USA, Inc.$209K
- Brainlab, Inc.$259
- Medtronic$158
- Zap Surgical Systems, Inc.$44
- Viiv Healthcare Company$32
- Tempus AI, Inc$28
- plus $104 from 5 others
Across 2 payments — averaging $8848.38 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.
- Siemens Medical Solutions USA, Inc.$18K
What the payments were for
- Consulting fees$119,81557%
- Speaking & faculty fees$46,80022%
- Travel & lodging$33,26516%
- Food & beverage$9,5985%
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 |
|---|---|---|
| Siemens Medical Solutions USA, Inc. | 172 | $208,855 |
| Brainlab, Inc. | 3 | $259 |
| Medtronic | 1 | $158 |
| Zap Surgical Systems, Inc. | 1 | $44 |
| Viiv Healthcare Company | 1 | $32 |
| Tempus AI, Inc | 1 | $28 |
| Menarini Silicon Biosystems, Inc. | 1 | $24 |
| Pacira Pharmaceuticals Incorporated | 1 | $24 |
| Boston Scientific | 1 | $21 |
| Accuray Incorporated | 1 | $20 |
| Karyopharm Therapeutics Inc. | 1 | $16 |
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.
- TrueBeam$17,049
- Varian Ethos Treatment Planning$14,675
- Clinac iX$14,065
- Edge$12,154
- Eclipse Treatment Planning System for External Beam Radiation Therapy$7,872
- Halcyon$1,184
- Varian Treatment$935
- Varian IDENTIFY$631
- Calypso System$169
- IN.PACT Admiral$158
- Brainlab, Inc.$100
How this compares
$209,478 in reported general payments places this provider in the 95th percentile of 465 radiation oncology providers in Florida.
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 |
|---|---|---|
| Dexamethasone | 30 | $379 |
Paid to pharmacies, not to this prescriber.
Other radiation oncology in Winter Park
- David DiamondWinter Park$44K
- Robert SollaccioWinter Park$13K
- Shravan KandulaOrlando$444K
- Martin KeischMiami Shores$319K
- Marcio FagundesMiami$274K
- Rupesh KotechaMiami$208K
- John SylvesterLakewood Ranch$205K
- Ravi ShridharOrlando$192K
- Alan BrownFort Myers$165K
- Akash NandaOrlando$165K
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.