Michael Antiporda, MD
Surgery · Knoxville, TNNPI 1083970669
Payments from drug & device makers
What this record shows
This record is dominated by education: $49,750 of the $77,124 with a category attached, or 64.5%. Intuitive Surgical accounts for 90.2% of it on its own, with 23 other manufacturers making up the rest. Reporting peaked in 2022 at $23,210 and has fallen 81.2% since, to $4,369 in 2025. Among surgery clinicians in TN with any reported payments, this total sits in the top 5% — high for the specialty, which is a reason to read the composition above rather than the number alone.
Across 226 payments — averaging $341.26 each. Meals, travel, consulting and speaking fees, gifts and royalties reported by drug and device makers.
- Intuitive Surgical$70K
- Medtronic$2K
- Davol Inc.$2K
- Medical Device Business Services, Inc.$1K
- Endogastric Solutions, Inc$537
- Johnson & Johnson$476
- plus $2K from 18 others
What the payments were for
- Speaking & faculty fees$4,1005%
- Travel & lodging$13,77518%
- Food & beverage$8,99312%
- Education$49,75065%
- Gifts$5061%
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 |
|---|---|---|
| Intuitive Surgical | 145 | $69,547 |
| Medtronic(3 entities) | 20 | $1,900 |
| Davol Inc. | 11 | $1,849 |
| Medical Device Business Services, Inc. | 3 | $1,121 |
| Endogastric Solutions, Inc | 5 | $537 |
| Johnson & Johnson | 8 | $476 |
| Covidien LP | 3 | $372 |
| Enterra Medical, Inc. | 5 | $357 |
| Conmed Corporation | 5 | $211 |
| Pacira Pharmaceuticals Incorporated | 1 | $123 |
| Boston Scientific | 2 | $115 |
| Biocomposites Inc | 1 | $102 |
| Merck | 3 | $68 |
| W. L. Gore & Associates, Inc. | 1 | $49 |
| Takeda Pharmaceuticals U.S.A., Inc. | 2 | $41 |
| Stryker | 2 | $40 |
| Apollo Endosurgery US Inc | 1 | $40 |
| BD | 1 | $37 |
| Teleflex LLC | 2 | $37 |
| Innocoll Pharmaceuticals Limited | 1 | $25 |
| Ambu Inc. | 1 | $23 |
| Solventum Corporation | 1 | $22 |
| Daiichi Sankyo Inc. | 1 | $17 |
| Endo Pharmaceuticals Inc. | 1 | $15 |
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.
- Da Vinci Surgical System$65,229
- DAVINCI XI$1,750
- LINX Reflux Management System$1,224
- Dextile$695
- ESOPHYX$443
- AbsorbaTack$349
- ProGrip$267
- Barrx$148
- Bravo$124
- EXPAREL$123
- TRANSORB$116
- Stimulan$102
How this compares
$77,124 in reported general payments places this provider in the 95th percentile of 516 surgery providers in Tennessee.
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 |
|---|---|---|
| Ondansetron OdtOndansetron | 192 | $2,287 |
| Hydrocodone-AcetaminophenHydrocodone/Acetaminophen | 71 | $2,204 |
| Oxycodone-AcetaminophenOxycodone Hcl/Acetaminophen | 84 | $489 |
| Omeprazole | 28 | $456 |
| Metoclopramide Hcl | 16 | $155 |
| Methylprednisolone | 17 | $93 |
| Ondansetron Hcl | 15 | $66 |
Paid to pharmacies, not to this prescriber.
Other surgery in Knoxville
- Melissa PhillipsKnoxville$182K
- Nitin RangnekarKnoxville$35K
- Kaela BlakeKnoxville$32K
- Stephen BoyceKnoxville$30K
- Matthew ManciniKnoxville$29K
- Gregory ManciniKnoxville$29K
- Mariah BeasleyKnoxville$17K
- Heath BroussardJackson$688K
- Eric WallaceCookeville$529K
- John RobertsonJohnson City$432K
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.