Mark Piedra, MD
Neurological Surgery · Billings, MTNPI 1457567703
Payments from drug & device makers
What this record shows
This record is dominated by food and beverage: $1,357 of the $2,119 with a category attached, or 64.0%. 5 manufacturers reported payments, led by Stryker at 43.7% of the total. Reporting peaked in 2021 at $1,252 and has fallen 94.2% since, to $73 in 2025. That places this record below the midpoint for neurological surgery clinicians in MT, where the typical reported total is $3,333.
Across 24 payments — averaging $88.27 each. Meals, travel, consulting and speaking fees, gifts and royalties reported by drug and device makers.
- Stryker$925
- Boston Scientific$785
- Medtronic$172
- Nevro Corp.$170
- Baxter Healthcare$65
What the payments were for
- Travel & lodging$76236%
- Food & beverage$1,35764%
Most of this is food and beverage — typically meals provided during product presentations at a clinic or hospital. Nationally that is the single largest category of reported payments by count.
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 |
|---|---|---|
| Stryker | 6 | $925 |
| Boston Scientific | 11 | $785 |
| Medtronic | 3 | $172 |
| Nevro Corp. | 3 | $170 |
| Baxter Healthcare | 1 | $65 |
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.
- EVEREST SPINAL SYSTEM$704
- GENERAL DBS$110
How this compares
$2,119 in reported general payments places this provider in the 40th percentile of 31 neurological surgery providers in Montana.
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 | 18 | $95 |
Paid to pharmacies, not to this prescriber.
Other neurological surgery in Billings
- Raymond TurnerBillings$1.3M
- Marlin RichardsonBillings$35K
- Stuart GoodmanBillings$14K
- Louis RossBillings$9K
- Jeffrey HakimBillings$9K
- Christopher StewartBillings$4K
- Vance FredricksonBillings$4K
- Michael MoroneBillings$3K
- William SpireBillings$1K
- Michael CopelandBillings$921
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.