Christopher Roark, MD
Neurological Surgery · Aurora, CONPI 1083768139
Payments from drug & device makers
What this record shows
This record is dominated by travel and lodging: $10,516 of the $13,082 with a category attached, or 80.4%. Siemens Medical Solutions USA, Inc. accounts for 71.4% of it on its own, with 9 other manufacturers making up the rest. Reporting peaked in 2019 at $9,900 and has fallen 99.1% since, to $85 in 2025.
Across 69 payments — averaging $189.60 each. Meals, travel, consulting and speaking fees, gifts and royalties reported by drug and device makers.
- Siemens Medical Solutions USA, Inc.$9K
- Microvention, Inc.$2K
- Medtronic$1K
- Stryker$239
- Viz.ai, Inc.$198
- Balt USA, LLC$154
- plus $205 from 4 others
Across 9 payments — averaging $3922.00 each. Payments tied to a research study. These frequently flow through the physician to a hospital or research institution rather than to the physician personally.
- Medtronic$35K
What the payments were for
- Travel & lodging$10,51680%
- Food & beverage$2,56620%
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 |
|---|---|---|
| Siemens Medical Solutions USA, Inc. | 11 | $9,341 |
| Microvention, Inc. | 5 | $1,575 |
| Medtronic(2 entities) | 37 | $1,371 |
| Stryker | 10 | $239 |
| Viz.ai, Inc. | 1 | $198 |
| Balt USA, LLC | 1 | $154 |
| Zimmer Biomet | 1 | $111 |
| Boston Scientific | 1 | $58 |
| Abbott | 1 | $22 |
| Terumo Medical 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.
- Artis pheno$8,529
- WEB$362
- STENT$291
- Solitaire$253
- SOLITAIRE X$233
- Pipeline$221
- Viz.AI LVO$198
- ARC$151
- Thinflap$111
How this compares
$13,082 in reported general payments places this provider in the 65th percentile of 149 neurological surgery providers in Colorado.
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 Aurora
- Peter FecciAurora$170K
- Joshua SeinfeldAurora$118K
- David CaseAurora$106K
- Ashraf YoussefAurora$95K
- Allen WaziriAurora$86K
- John SampsonAurora$78K
- Yasuaki HarasakiAurora$75K
- Steven OjemannAurora$59K
- Tareq YaseenAurora$37K
- Ahmed HelalAurora$37K
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.