Mark Gimbel, MD
Surgical Oncology · Gilbert, AZNPI 1235324518
Payments from drug & device makers
What this record shows
The money is spread across several categories — consulting fees (60.0%), education and travel and lodging — rather than concentrated in one kind of arrangement. Merck accounts for 61.1% of it on its own, with 5 other manufacturers making up the rest. Reporting peaked in 2023 at $6,649 and has fallen 98.8% since, to $82 in 2025. Among surgical 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 30 payments — averaging $474.46 each. Meals, travel, consulting and speaking fees, gifts and royalties reported by drug and device makers.
- Merck$9K
- Intuitive Surgical$5K
- Stryker$145
- Novartis$125
- Tempus AI, Inc$82
- E.r. Squibb & Sons, L.L.C.$16
What the payments were for
- Consulting fees$8,54060%
- Speaking & faculty fees$2001%
- Travel & lodging$8206%
- Food & beverage$6745%
- Education$4,00028%
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 |
|---|---|---|
| Merck | 3 | $8,690 |
| Intuitive Surgical | 22 | $5,176 |
| Stryker | 1 | $145 |
| Novartis | 2 | $125 |
| Tempus AI, Inc | 1 | $82 |
| E.r. Squibb & Sons, L.L.C. | 1 | $16 |
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
$14,234 in reported general payments places this provider in the 90th 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.
Most prescribed under Part D
| Drug | Claims | Cost to plans & patients |
|---|---|---|
| Neomycin Sulfate | 12 | $63 |
| Oxycodone Hcl | 11 | $29 |
| Metronidazole | 13 | $27 |
Paid to pharmacies, not to this prescriber.
Other surgical oncology in Gilbert
- Epameinondas DogeasGilbert$3K
- Jacqueline KienholzGilbert$2K
- Sarianne StradlingGilbert$1K
- Robin SchmitzGilbert$607
- Thomas ShellenbergerGilbert$468
- Rajesh RamanathanGilbert$324
- Chynna LiuGilbert$159
- Vasileios TsagkalidisGilbert$148
- Mark HealyGilbert$105
- David JacofskyPhoenix$11.3M
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.