Zachary Yeung, MD
Medical Oncology · Gilbert, AZNPI 1043667413
Payments from drug & device makers
What this record shows
Almost everything reported here is food and beverage — 98.0% of the total across 48 separate payments, which is the pattern of a clinician who attends manufacturer presentations rather than one with a consulting arrangement. It is spread thinly across 21 manufacturers, the largest accounting for just 19.2% — the pattern of someone who eats at a lot of different presentations. Reporting peaked in 2021 at $533 and has fallen 93.0% since, to $38 in 2025. That places this record below the midpoint for medical oncology clinicians in AZ, where the typical reported total is $8,518.
Across 48 payments — averaging $30.18 each. Meals, travel, consulting and speaking fees, gifts and royalties reported by drug and device makers.
- Incyte Corporation$278
- Bristol Myers Squibb$201
- Sanofi$118
- Daiichi Sankyo Inc.$110
- Tersera Therapeutics LLC$105
- Rigel Pharmaceuticals, Inc.$89
- plus $547 from 15 others
Across 3 payments — averaging $34,809 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.
- Janssen Research & Development, LLC$104K
What the payments were for
- Food & beverage$1,41998%
- Education$292%
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.
| Company | Payments | Total |
|---|---|---|
| Incyte Corporation | 4 | $278 |
| Bristol Myers Squibb | 10 | $201 |
| Sanofi | 1 | $118 |
| Daiichi Sankyo Inc. | 1 | $110 |
| Tersera Therapeutics LLC | 1 | $105 |
| Rigel Pharmaceuticals, Inc. | 2 | $89 |
| AstraZeneca | 4 | $82 |
| Bayer | 5 | $79 |
| Lilly USA, LLC | 5 | $70 |
| Pfizer | 3 | $49 |
| Janssen Research & Development, LLC | 1 | $38 |
| Amgen | 1 | $31 |
| Agios Pharmaceuticals, Inc. | 2 | $30 |
| AVEO Pharmaceuticals, Inc. | 1 | $29 |
| Tempus AI, Inc | 1 | $28 |
| Novartis | 1 | $22 |
| Astellas Pharma US Inc | 1 | $22 |
| E.r. Squibb & Sons, L.L.C. | 1 | $19 |
| Merck | 1 | $18 |
| Johnson & Johnson | 1 | $18 |
| Takeda Pharmaceuticals U.S.A., Inc. | 1 | $14 |
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.
How this compares
$1,449 in reported general payments places this provider in the 30th percentile of 59 medical 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 |
|---|---|---|
| LenvimaLenvatinib Mesylate | 11 | $255,849 |
| CreonLipase/Protease/Amylase | 49 | $199,772 |
| LonsurfTrifluridine/Tipiracil Hcl | 11 | $157,940 |
| XermeloTelotristat Etiprate | 12 | $120,023 |
| ZenpepLipase/Protease/Amylase | 15 | $67,778 |
| EliquisApixaban | 38 | $33,096 |
| Octreotide Acetate | 19 | $13,366 |
| XareltoRivaroxaban | 14 | $8,720 |
| Xtampza ErOxycodone Myristate | 11 | $8,691 |
| VarubiRolapitant Hcl | 11 | $7,739 |
| Ondansetron OdtOndansetron | 40 | $1,883 |
| Olanzapine | 122 | $1,703 |
| Ondansetron Hcl | 68 | $1,410 |
| Prochlorperazine Maleate | 71 | $1,306 |
| Potassium Chloride | 34 | $887 |
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 |
|---|---|---|
| Tersera Therapeutics LLCXermelo, Varubi | $105 | $127,76223 claims |
| PfizerEliquis | $49 | $33,09638 claims |
| Johnson & JohnsonXarelto | $18 | $8,72014 claims |
| Lilly USA, LLCOlanzapine | $70 | $1,703122 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 30th percentile of 59 medical oncology providers in Arizona.
Other medical oncology in Gilbert
- Fade MahmoudGilbert$14K
- Isaac BowmanGilbert$14K
- Sumeet MendoncaGilbert$12K
- Christina GomezGilbert$7K
- Saba RadhiGilbert$1K
- Bryan WongGilbert$238
- Jason SalganickPhoenix$1.6M
- Roopesh KantalaMesa$491K
- Nazish AhmadGlendale$205K
- Daniel von HoffScottsdale$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.