Terence Sio, MD
Radiation Oncology · Scottsdale, AZNPI 1811200736
Payments from drug & device makers
What this record shows
This record is dominated by speaking fees: $9,905 of the $14,622 with a category attached, or 67.7%. Novocure Inc. accounts for 92.5% of it on its own, with 7 other manufacturers making up the rest. Reporting peaked in 2019 at $9,308 and has fallen 85.8% since, to $1,326 in 2025. Among radiation oncology clinicians in AZ 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 32 payments — averaging $456.95 each. Meals, travel, consulting and speaking fees, gifts and royalties reported by drug and device makers.
- Novocure Inc.$14K
- Viewray Technologies Inc$259
- GT Medical Technologies, Inc$225
- Teleflex LLC$168
- Galvanize Therapeutics, Inc$130
- AstraZeneca$128
- plus $191 from 2 others
Across 47 payments — averaging $4399.69 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 GmbH$124K
- Novocure Inc.$82K
What the payments were for
- Consulting fees$9006%
- Speaking & faculty fees$9,90568%
- Travel & lodging$1,3239%
- Food & beverage$2,49517%
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 |
|---|---|---|
| Novocure Inc. | 25 | $13,521 |
| Viewray Technologies Inc | 1 | $259 |
| GT Medical Technologies, Inc | 1 | $225 |
| Teleflex LLC | 1 | $168 |
| Galvanize Therapeutics, Inc | 1 | $130 |
| AstraZeneca | 1 | $128 |
| Progenics Pharmaceuticals, Inc. | 1 | $125 |
| Elekta, Inc. | 1 | $66 |
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.
- Oncology$8,491
- OPTUNE LUA (NOVOTTF-200T)$324
- MRIdian$259
- GammaTile$225
- ALIYA SYSTEM$130
- IMFINZI$128
- PYLARIFY$125
How this compares
$14,622 in reported general payments places this provider in the 95th percentile of 138 radiation oncology providers in Arizona.
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 Scottsdale
- Carlos VargasScottsdale$22K
- Vershalee ShuklaScottsdale$19K
- Aaron AmbradScottsdale$18K
- Gordon GradoScottsdale$12K
- Gregory MaggassScottsdale$11K
- Scott TannehillScottsdale$8K
- Randa TaoScottsdale$6K
- Apar GuptaScottsdale$6K
- Chi ZhangScottsdale$4K
- Ammoren DohmScottsdale$4K
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.