Bohdan Chopko, PhD
Neurological Surgery · Mansfield, OHNPI 1932183332
Payments from drug & device makers
What this record shows
This record is dominated by consulting fees: $4,800 of the $6,736 with a category attached, or 71.3%. Microvention, Inc. accounts for 71.3% of it on its own, with 9 other manufacturers making up the rest. Reporting peaked in 2020 at $4,815 and has fallen 96.9% since, to $147 in 2025.
Across 26 payments — averaging $259.09 each. Meals, travel, consulting and speaking fees, gifts and royalties reported by drug and device makers.
- Microvention, Inc.$5K
- Carlsmed, Inc.$725
- Stryker$481
- Irras USA, Inc.$179
- Mizuho America, Inc.$172
- Medicrea USA, Corp.$150
- plus $231 from 4 others
What the payments were for
- Consulting fees$4,80071%
- Travel & lodging$69010%
- Food & beverage$1,09116%
- Education$1562%
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 |
|---|---|---|
| Microvention, Inc. | 4 | $4,800 |
| Carlsmed, Inc. | 3 | $725 |
| Stryker | 6 | $481 |
| Irras USA, Inc. | 2 | $179 |
| Mizuho America, Inc. | 1 | $172 |
| Medicrea USA, Corp. | 1 | $150 |
| VB Spine LLC | 5 | $147 |
| Medtronic | 1 | $32 |
| Smith+Nephew | 2 | $29 |
| Baxter Healthcare | 1 | $22 |
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.
- PHIL$3,200
- CASPER$1,600
- aprevo$690
- VITOSS$156
- PASS-LP$150
- UNiD$150
- SERRATO$130
- MESA SPINAL SYSTEM$130
- ALEUTIAN INTERBODY SYSTEMS$130
- TRITANIUM$130
- MESA$109
How this compares
$6,736 in reported general payments places this provider in the 65th 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.
Other neurological surgery in Mansfield
- Abdi MohitCleveland$884K
- William ZerickWesterville$778K
- Christian BonassoColumbus$656K
- Russell LonserColumbus$419K
- Zachary TempelCincinnati$351K
- Jamal TahaCenterville$341K
- Chris KarasColumbus$339K
- Kamal WoodsMiamisburg$268K
- David XuColumbus$263K
- Michael KachmannCincinnati$247K
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.