Chris Karas, MD
Neurological Surgery · Columbus, OHNPI 1174781587
Payments from drug & device makers
What this record shows
This record is dominated by royalties or licence payments: $317,291 of the $339,397 with a category attached, or 93.5%. 15 manufacturers reported payments, led by Orthofix Medical, Inc. at 50.8% of the total. 2025 is the largest year on record at $69,823, 2.2 times the $31,732 reported in 2019. Among neurological surgery clinicians in OH 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 163 payments — averaging $2082.19 each. Meals, travel, consulting and speaking fees, gifts and royalties reported by drug and device makers.
- Orthofix Medical, Inc.$172K
- Seaspine Orthopedics Corporation$145K
- Medtronic$21K
- Globus Medical$277
- Saluda Medical Americas, Inc.$247
- Abbott$231
- plus $839 from 9 others
What the payments were for
- Royalty or licence$317,29193%
- Consulting fees$2,9951%
- Speaking & faculty fees$12,7504%
- Travel & lodging$1,8541%
- Food & beverage$4,5071%
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 |
|---|---|---|
| Orthofix Medical, Inc. | 24 | $172,250 |
| Seaspine Orthopedics Corporation | 25 | $145,041 |
| Medtronic(2 entities) | 90 | $20,511 |
| Globus Medical | 5 | $277 |
| Saluda Medical Americas, Inc. | 2 | $247 |
| Abbott | 1 | $231 |
| Nevro Corp. | 7 | $211 |
| GT Medical Technologies, Inc | 1 | $180 |
| Johnson & Johnson | 1 | $125 |
| Centinel Spine, LLC | 1 | $125 |
| Rock Medical Orthopedics, Inc. | 1 | $59 |
| Choice Spine, LLC | 1 | $53 |
| Kls-martin L.p. | 2 | $34 |
| Stryker | 1 | $28 |
| Si-bone, Inc. | 1 | $23 |
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.
- Shoreline ASC$127,746
- Physio-Stim$66,943
- Shoreline ACS$64,866
- Shoreline$30,805
- Shoreline RT$26,931
- INTELLIS ADAPTIVESTIM$14,360
- INTELLIS$2,558
- VECTRIS$478
- Proclaim Family of SCS IPGs$231
- GammaTile$180
- Evoke$148
- Senza$128
- CMF INSTRUMENTS$125
- PRODISC L$125
How this compares
$339,397 in reported general payments places this provider in the 95th percentile of 301 neurological surgery providers in Ohio.
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 |
|---|---|---|
| Gabapentin | 14 | $60 |
Paid to pharmacies, not to this prescriber.
Other neurological surgery in Columbus
- Christian BonassoColumbus$656K
- Russell LonserColumbus$419K
- David XuColumbus$263K
- Andrew GrossbachColumbus$213K
- Stephanus ViljoenColumbus$115K
- Patrick YoussefColumbus$96K
- Daniel PrevedelloColumbus$93K
- Shahid NimjeeColumbus$81K
- Vikram ChakravarthyColumbus$77K
- Taylor SommerColumbus$56K
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.