Zhi Ven Fong, MD
Surgical Oncology · Phoenix, AZNPI 1417219221
Payments from drug & device makers
What this record shows
This record is dominated by consulting fees: $4,765 of the $6,797 with a category attached, or 70.1%. 6 manufacturers reported payments, led by Medtronic at 46.1% of the total. Reporting peaked in 2023 at $4,487 and has fallen 93.2% since, to $306 in 2025.
Across 14 payments — averaging $485.47 each. Meals, travel, consulting and speaking fees, gifts and royalties reported by drug and device makers.
- Medtronic$3K
- Olympus Medical Systems Corporation$2K
- Intuitive Surgical$2K
- Medical Device Business Services, Inc.$261
- Dilon Technologies, Inc.$148
- Intera Oncology, Inc$45
What the payments were for
- Consulting fees$4,76570%
- Travel & lodging$1022%
- Food & beverage$4306%
- Education$1,50022%
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 |
|---|---|---|
| Medtronic | 5 | $3,132 |
| Olympus Medical Systems Corporation | 1 | $1,710 |
| Intuitive Surgical | 1 | $1,500 |
| Medical Device Business Services, Inc. | 5 | $261 |
| Dilon Technologies, Inc. | 1 | $148 |
| Intera Oncology, Inc | 1 | $45 |
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.
- OES CHOLEDOCHOFIBERSCOPE$1,710
- DAVINCI XI$1,500
- Palindrome$355
- HemoBlast Bellows$148
- Neuwave$146
How this compares
$6,797 in reported general payments places this provider in the 85th percentile of 29 surgical 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 surgical oncology in Phoenix
- David JacofskyPhoenix$11.3M
- Dipak RamkumarPhoenix$148K
- Zeynep AydiPhoenix$4K
- William CancePhoenix$2K
- Jason WisemanPhoenix$96
- Mark GimbelGilbert$14K
- Taylor RiallTucson$6K
- Rohit SahaiChandler$5K
- Sivakami MoorthyGlendale$5K
- Mohammad KhreissTucson$3K
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.