Zachary Oaks, MD
Radiation Oncology · Indianapolis, INNPI 1457841157
Payments from drug & device makers
What this record shows
Almost everything reported here is food and beverage — 100.0% of the total across 29 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 14 manufacturers, the largest accounting for just 20.3% — the pattern of someone who eats at a lot of different presentations. 2025 is the largest year on record at $895, 3.2 times the $283 reported in 2023.
Across 29 payments — averaging $61.07 each. Meals, travel, consulting and speaking fees, gifts and royalties reported by drug and device makers.
- Boston Scientific$359
- Bioprotect Medical, Inc.$334
- Teleflex LLC$138
- Pfizer$125
- Daiichi Sankyo Inc.$125
- Genentech USA, Inc.$123
- plus $567 from 8 others
What the payments were for
- Food & beverage$1,771100%
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 |
|---|---|---|
| Boston Scientific | 6 | $359 |
| Bioprotect Medical, Inc. | 3 | $334 |
| Teleflex LLC | 1 | $138 |
| Pfizer | 1 | $125 |
| Daiichi Sankyo Inc. | 1 | $125 |
| Genentech USA, Inc. | 1 | $123 |
| Johnson & Johnson | 1 | $122 |
| Eisai Inc. | 1 | $122 |
| Novartis | 5 | $111 |
| Siemens Medical Solutions USA, Inc. | 3 | $75 |
| Dendreon Pharmaceuticals LLC | 2 | $58 |
| Novocure Inc. | 2 | $36 |
| Molnlycke Health Care US, LLC | 1 | $24 |
| Bayer | 1 | $19 |
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.
- BIOPROTECT BALLOON IMPLANT SYSTEM$306
- SpaceOAR VUE System - 10mL$230
- Barrigel$138
- PADCEV$125
- TECENTRIQ$123
- RYBREVANT$122
- CARVYKTI$122
- LENVIMA$122
How this compares
$1,771 in reported general payments places this provider in the 75th percentile of 116 radiation oncology providers in Indiana.
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 |
|---|---|---|
| Tamsulosin Hcl | 37 | $794 |
| Oxycodone Hcl | 15 | $420 |
| Ondansetron OdtOndansetron | 11 | $204 |
| Dexamethasone | 15 | $169 |
| Mupirocin | 23 | $159 |
| Levothyroxine Sodium | 20 | $124 |
| Lorazepam | 20 | $29 |
Paid to pharmacies, not to this prescriber.
Other radiation oncology in Indianapolis
- Michael EatonIndianapolis$11K
- Gordon WatsonIndianapolis$6K
- John CoxIndianapolis$5K
- Peter GarrettIndianapolis$5K
- Garrett JensenIndianapolis$4K
- Alexander YehIndianapolis$3K
- Erin McCammackIndianapolis$2K
- David KimIndianapolis$2K
- Darrel RossIndianapolis$2K
- Craig SchneiderIndianapolis$2K
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.