Adam Smitherman, MD
Neurological Surgery · Oklahoma City, OKNPI 1962848010
Payments from drug & device makers
What this record shows
The money is spread across several categories — education (39.4%), food and beverage and travel and lodging — rather than concentrated in one kind of arrangement. 10 manufacturers reported payments, led by Medtronic at 44.0% of the total. Reporting peaked in 2021 at $1,470 and has fallen 86.4% since, to $200 in 2025.
Across 27 payments — averaging $121.61 each. Meals, travel, consulting and speaking fees, gifts and royalties reported by drug and device makers.
- Medtronic$1K
- Stryker$613
- Globus Medical$552
- Si-bone, Inc.$198
- Smith+Nephew$144
- Boston Scientific$138
- plus $194 from 4 others
What the payments were for
- Travel & lodging$99230%
- Food & beverage$99730%
- Education$1,29439%
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 |
|---|---|---|
| Medtronic(2 entities) | 10 | $1,444 |
| Stryker | 3 | $613 |
| Globus Medical | 4 | $552 |
| Si-bone, Inc. | 2 | $198 |
| Smith+Nephew | 1 | $144 |
| Boston Scientific | 3 | $138 |
| Orthofix Medical, Inc. | 1 | $134 |
| Davol Inc. | 1 | $34 |
| Sanara Medtech Inc. | 1 | $15 |
| Molnlycke Health Care US, LLC | 1 | $12 |
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.
- NONE$570
- O-ARM-ST$543
- Excelsius - GPS$381
- PRESTIGE$300
- AETOS Shoulder System$144
- TWINFIX$144
- iFuse Implant$140
- M6-C$134
- CALIBER$107
How this compares
$3,283 in reported general payments places this provider in the 55th percentile of 80 neurological surgery providers in Oklahoma.
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 | 265 | $2,315 |
| Methocarbamol | 38 | $424 |
| Oxycodone-AcetaminophenOxycodone Hcl/Acetaminophen | 18 | $335 |
| Pregabalin | 46 | $325 |
| Mupirocin | 39 | $304 |
| Hydrocodone-AcetaminophenHydrocodone/Acetaminophen | 16 | $200 |
| Diclofenac Sodium | 17 | $184 |
| Oxycodone Hcl | 11 | $109 |
| Prednisone | 12 | $23 |
Paid to pharmacies, not to this prescriber.
Other neurological surgery in Oklahoma City
- Brian SnellOklahoma City$3.7M
- Fadi NasrOklahoma City$1.6M
- Robert TibbsOklahoma City$537K
- Michael HahnOklahoma City$267K
- Isaac KarikariOklahoma City$137K
- Joseph CoxOklahoma City$123K
- Hakeem ShakirOklahoma City$63K
- Robert WieneckeOklahoma City$40K
- Muhammad JanjuaOklahoma City$33K
- Caple SpenceOklahoma City$31K
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.