Dean Karahalios, MD
Neurological Surgery · Park Ridge, ILNPI 1245205210
Payments from drug & device makers
What this record shows
This record is dominated by royalties or licence payments: $105,659 of the $169,882 with a category attached, or 62.2%. 14 manufacturers reported payments, led by Zimmer Biomet at 56.3% of the total. Reporting peaked in 2019 at $81,184 and has fallen 97.6% since, to $1,985 in 2025. Among neurological surgery clinicians in IL 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 165 payments — averaging $1029.59 each. Meals, travel, consulting and speaking fees, gifts and royalties reported by drug and device makers.
- Zimmer Biomet$96K
- Medtronic$70K
- Baxter Healthcare$2K
- Medwest Associates$1K
- Globus Medical$869
- Orthofix Medical, Inc.$157
- plus $333 from 8 others
What the payments were for
- Royalty or licence$105,65962%
- Consulting fees$55,01032%
- Travel & lodging$6,4514%
- Food & beverage$1,5631%
- Education$1,2001%
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 | 73 | $95,671 |
| Medtronic(2 entities) | 63 | $69,894 |
| Baxter Healthcare | 1 | $1,760 |
| Medwest Associates | 1 | $1,200 |
| Globus Medical | 8 | $869 |
| Orthofix Medical, Inc. | 8 | $157 |
| Elekta, Inc. | 2 | $146 |
| Medical Device Business Services, Inc. | 2 | $45 |
| Si-bone, Inc. | 2 | $36 |
| Brainlab, Inc. | 1 | $28 |
| Zimvie Inc. | 1 | $24 |
| Axogen | 1 | $23 |
| Hospira, Inc. | 1 | $16 |
| Integra Lifesciences Corporation | 1 | $14 |
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.
- VERTE-STACK$47,619
- WalterLorenz Surgical Assist Arm$27,840
- Walter$25,246
- Vital$15,345
- PrimaGen$15,000
- Mobi-C$15,000
- Timberline$15,000
- VERTE-STACK SPINAL SYSTEM$10,990
- Alpine XC$9,539
- PD-Spine-New Product$6,600
- FLOSEAL$1,760
- XLIF$732
- Pulse$732
- ALIF$732
- ELEKTA MEDICAL LINEAR ACCELERATOR$129
How this compares
$169,882 in reported general payments places this provider in the 95th percentile of 302 neurological surgery providers in Illinois.
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 |
|---|---|---|
| Celecoxib | 11 | $1,059 |
| Cyclobenzaprine Hcl | 14 | $28 |
Paid to pharmacies, not to this prescriber.
Other neurological surgery in Park Ridge
- Patrick SugruePark Ridge$571K
- Demetrius LopesPark Ridge$302K
- Amanda SaratsisPark Ridge$144K
- Zayed AlmadidyPark Ridge$53K
- Joshua BillingsleyPark Ridge$36K
- Tyler KoskiChicago$2.3M
- Vincent TraynelisChicago$1.8M
- Sergey NeckryshChicago$1.6M
- Russell NockelsArlington Heights$1.4M
- Bruce FrankelSpringfield$1.3M
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.