Tam Nguyen, MD
Radiation Oncology · Mesa, AZNPI 1437128113
Payments from drug & device makers
Across 546 payments — averaging $21.59 each. Meals, travel, consulting and speaking fees, gifts and royalties reported by drug and device makers.
- AstraZeneca$1K
- Merck$1K
- Novartis$723
- Varian Medical Systems, Inc.$679
- Johnson & Johnson$617
- Daiichi Sankyo Inc.$608
- plus $7K from 54 others
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.
How this compares
$11,789 in reported general payments places this provider in the 85th 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 Mesa
- Ronik BhangooMesa$11K
- Davis RomneyMesa$9K
- Chi ZhangScottsdale$495K
- Michael GarciaSun City$366K
- Michael SamuelsGilbert$323K
- John KreslPhoenix$251K
- Terence SioScottsdale$221K
- Nitika ThawaniPhoenix$199K
- Carlos VargasScottsdale$179K
- Baldassarre SteaTucson$120K
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.