Tharun Karthikeyan, MD
Orthopaedic Surgery · Lexington, KYNPI 1922200468
Payments from drug & device makers
Across 77 payments — averaging $373.75 each. Meals, travel, consulting and speaking fees, gifts and royalties reported by drug and device makers.
- Zimmer Biomet$19K
- Medical Device Business Services, Inc.$8K
- Stryker$1K
- Johnson & Johnson$492
- Smith+Nephew$157
- Onkos Surgical, Inc.$120
- plus $170 from 2 others
What the payments were for
- Consulting fees$18,45064%
- Travel & lodging$4,08914%
- Food & beverage$4,85017%
- Education$1,3895%
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 |
|---|---|---|
| Zimmer Biomet | 49 | $19,022 |
| Medical Device Business Services, Inc. | 2 | $7,650 |
| Stryker | 15 | $1,169 |
| Johnson & Johnson(2 entities) | 6 | $492 |
| Smith+Nephew | 2 | $157 |
| Onkos Surgical, Inc. | 1 | $120 |
| Medtronic | 1 | $96 |
| Solventum Corporation | 1 | $74 |
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.
- ROSA$9,930
- Persona$7,860
- G7$1,016
- TRIATHLON$451
- Avenir$333
- ATTUNE$268
- ACTIS$156
- Journey II$141
- Legion Revision$141
- Connected Health-MyMobility$139
- TRITANIUM$137
- NONE$132
- Juggerknotless Soft Anchor$121
- ELEOS LIMB SALVAGE SYSTEM$120
- ROSA-Knee$114
- Persona Revision$102
How this compares
$28,778 in reported general payments places this provider in the 80th percentile of 322 orthopaedic surgery providers in Kentucky.
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 |
|---|---|---|
| Oxycodone-AcetaminophenOxycodone Hcl/Acetaminophen | 673 | $5,438 |
| Pregabalin | 257 | $2,203 |
| Tranexamic Acid | 88 | $1,741 |
| Celecoxib | 32 | $1,007 |
| Meloxicam | 349 | $911 |
| Ondansetron Hcl | 152 | $876 |
| Cefadroxil | 127 | $759 |
| Tramadol Hcl | 98 | $241 |
| Diclofenac Sodium | 21 | $235 |
| Hydrocodone-AcetaminophenHydrocodone/Acetaminophen | 30 | $210 |
| Cephalexin | 116 | $159 |
| Methylprednisolone | 21 | $116 |
| Oxycodone Hcl | 16 | $70 |
| Clindamycin Hcl | 13 | $14 |
| Amoxicillin | 11 | $12 |
Paid to pharmacies, not to this prescriber.
Other orthopaedic surgery in Lexington
- Brent MorrisLexington$901K
- Paul MatuszewskiLexington$634K
- Victor MarwinLexington$444K
- Christian ChristensenLexington$317K
- Kevin DenehyLexington$258K
- Daniel HackettLexington$230K
- Kaveh SajadiLexington$199K
- Mary IrelandLexington$113K
- Camden BurnsLexington$67K
- Srinath KamineniLexington$44K
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.