Aaron Ambrad, MD
Radiation Oncology · Scottsdale, AZNPI 1265411961
Payments from drug & device makers
What this record shows
This record is dominated by food and beverage: $16,140 of the $18,039 with a category attached, or 89.5%. It is spread thinly across 60 manufacturers, the largest accounting for just 16.4% — the pattern of someone who eats at a lot of different presentations. 2025 is the largest year on record at $4,136, 3.5 times the $1,170 reported in 2019. 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 736 payments — averaging $24.51 each. Meals, travel, consulting and speaking fees, gifts and royalties reported by drug and device makers.
- AstraZeneca$3K
- Novartis$1K
- Johnson & Johnson$1K
- Merck$943
- Novocure Inc.$704
- Pfizer$644
- plus $10K from 54 others
Across 2 payments — averaging $6125.00 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.$12K
What the payments were for
- Consulting fees$1,89010%
- Food & beverage$16,14089%
- Education$90%
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.
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.
- IMFINZI$1,890
- Xofigo$284
- Optune$258
- Magseed$173
- Magtrace$173
- OPTUNE LUA (NOVOTTF-200T)$169
- Optune Gio$161
- Orserdu$142
- Nubeqa$142
- MI CANCER SEEK$140
- Erleada$112
- LIBTAYO$102
How this compares
$18,039 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
- Terence SioScottsdale$15K
- 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.