Raul Cardenas, MD
Neurological Surgery · Memphis, TNNPI 1619187697
Payments from drug & device makers
What this record shows
This record is dominated by consulting fees: $7,550 of the $9,952 with a category attached, or 75.9%. Medtronic accounts for 83.5% of it on its own, with 12 other manufacturers making up the rest. Reporting peaked in 2023 at $3,174 and has fallen 80.3% since, to $626 in 2025.
Across 42 payments — averaging $236.95 each. Meals, travel, consulting and speaking fees, gifts and royalties reported by drug and device makers.
- Medtronic$8K
- Globus Medical$772
- Arthrex$205
- Si-bone, Inc.$147
- Centinel Spine, LLC$103
- Integrity Implants Inc.$94
- plus $324 from 7 others
Across 9 payments — averaging $4882.00 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$44K
What the payments were for
- Consulting fees$7,55076%
- Travel & lodging$5986%
- Food & beverage$1,80418%
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) | 18 | $8,307 |
| Globus Medical | 6 | $772 |
| Arthrex | 3 | $205 |
| Si-bone, Inc. | 2 | $147 |
| Centinel Spine, LLC | 1 | $103 |
| Integrity Implants Inc. | 1 | $94 |
| Amgen | 1 | $74 |
| Osteoremedies, LLC | 1 | $67 |
| AbbVie | 3 | $57 |
| Gentleman Orthopedic Solutions | 1 | $41 |
| Boston Scientific | 2 | $40 |
| Abbott | 2 | $27 |
| Kuros Biosciences USA, Inc | 1 | $17 |
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.
How this compares
$9,952 in reported general payments places this provider in the 65th percentile of 156 neurological surgery providers in Tennessee.
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 |
|---|---|---|
| Tizanidine Hcl | 23 | $383 |
| Methylprednisolone | 38 | $247 |
| Methocarbamol | 13 | $131 |
| Amitriptyline Hcl | 12 | $103 |
| Gabapentin | 18 | $85 |
Paid to pharmacies, not to this prescriber.
Other neurological surgery in Memphis
- Kevin FoleyMemphis$162.4M
- Maurice SmithMemphis$4.4M
- Adam ArthurMemphis$1.9M
- Paul ParkMemphis$1.2M
- Daniel HoitMemphis$607K
- Jason GerrardMemphis$112K
- Earl JonesMemphis$59K
- Demi DawkinsMemphis$56K
- Isaac PomeraniecMemphis$56K
- Kyle SmithMemphis$48K
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.