Sam Sun, MD
Radiation Oncology · Goodyear, AZNPI 1235584855
Payments from drug & device makers
What this record shows
The money is spread across several categories — food and beverage (54.4%), consulting fees and travel and lodging — rather than concentrated in one kind of arrangement. 55 manufacturers reported payments, led by Pfizer at 37.0% of the total. Reporting peaked in 2023 at $6,540 and has fallen 52.8% since, to $3,084 in 2025. Among radiation oncology clinicians in AZ with any reported payments, this total sits in the top 10% — high for the specialty, which is a reason to read the composition above rather than the number alone.
Across 213 payments — averaging $67.16 each. Meals, travel, consulting and speaking fees, gifts and royalties reported by drug and device makers.
- Pfizer$5K
- AstraZeneca$2K
- Siemens Medical Solutions USA, Inc.$941
- Seagen Inc.$413
- E.r. Squibb & Sons, L.L.C.$359
- Elekta, Inc.$344
- plus $5K from 49 others
Across 1 payment — averaging $8325.00 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.
- Sumitomo Pharma America, Inc.$8K
What the payments were for
- Consulting fees$4,55032%
- Speaking & faculty fees$7705%
- Travel & lodging$1,1288%
- Food & beverage$7,78854%
- Education$700%
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.
- ORGOVYX$4,949
- IMFINZI$765
- TAGRISSO$525
- ILLUCCIX$506
- LIBTAYO$371
- Enhertu$242
- OPDIVO$208
- REFLEXION MEDICAL RADIOTHERAPY SYSTEM$166
- ELEKTA MEDICAL LINEAR ACCELERATOR$145
- Orserdu$142
- EXKIVITY$118
- ELEKTA UNITY$115
- SpaceOAR VUE System - 10mL$113
- Optune$112
- IMBRUVICA$111
- BYFAVO$106
- EMPLICITI$104
- KEYTRUDA$104
- ZIIHERA$103
- ADCETRIS$101
How this compares
$14,306 in reported general payments places this provider in the 90th 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.
Most prescribed under Part D
| Drug | Claims | Cost to plans & patients |
|---|---|---|
| OrgovyxRelugolix | 17 | $43,915 |
| Mometasone Furoate | 22 | $408 |
| Pentoxifylline | 11 | $337 |
| Tamsulosin Hcl | 12 | $181 |
| Oxybutynin Chloride ErOxybutynin Chloride | 16 | $178 |
| Gabapentin | 22 | $154 |
Paid to pharmacies, not to this prescriber.
Companies that both paid and supply prescribed drugs
These companies both reported payments to this provider and make drugs the provider prescribed under Medicare Part D in 2024. For most specialties this overlap is expected — a cardiologist who is paid by a cardiology drugmaker also treats heart disease. It is shown so the reader can see it, not because it implies anything on its own.
| Company | Paid to this provider | Part D cost of their drugs |
|---|---|---|
| Sumitomo Pharma America, Inc.Orgovyx | $224 | $43,91517 claims |
Reading this fairly. The Part D column is what drug plans and patients paid pharmacies — this provider received none of it, and it reflects how many patients they treat and what those drugs cost. Against peers, this provider's reported payments sit in the 90th percentile of 138 radiation oncology providers in Arizona.
Other radiation oncology in Goodyear
- Neil D'souzaGoodyear$7K
- John KreslPhoenix$248K
- Eric GrossChandler$26K
- Carlos VargasScottsdale$22K
- Vershalee ShuklaScottsdale$19K
- Aaron AmbradScottsdale$18K
- Murali MurtyGlendale$17K
- Terence SioScottsdale$15K
- Gordon GradoScottsdale$12K
- Tam NguyenMesa$12K
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.