Michael Thambuswamy, MD
Neurological Surgery · Tulsa, OKNPI 1134369556
Payments from drug & device makers
What this record shows
This record is dominated by consulting fees: $62,150 of the $92,174 with a category attached, or 67.4%. 20 manufacturers reported payments, led by Corelink, LLC at 32.4% of the total. Reporting peaked in 2024 at $33,115 and has fallen 59.1% since, to $13,538 in 2025.
Across 229 payments — averaging $402.51 each. Meals, travel, consulting and speaking fees, gifts and royalties reported by drug and device makers.
- Corelink, LLC$30K
- Zsfab, Inc.$25K
- Cerapedics Inc.$15K
- Zavation Medical Products, LLC$10K
- Medtronic$6K
- Si-bone, Inc.$4K
- plus $2K from 14 others
What the payments were for
- Consulting fees$62,15067%
- Travel & lodging$13,57415%
- Food & beverage$15,13316%
- Education$480%
- Gifts$1430%
- Entertainment$1,1251%
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 |
|---|---|---|
| Corelink, LLC | 25 | $29,821 |
| Zsfab, Inc. | 6 | $25,371 |
| Cerapedics Inc. | 31 | $14,747 |
| Zavation Medical Products, LLC | 16 | $9,544 |
| Medtronic(2 entities) | 91 | $6,311 |
| Si-bone, Inc. | 37 | $4,020 |
| Alphatec Spine, Inc | 5 | $1,545 |
| Elevation Spine, Inc. | 1 | $143 |
| Kuros Biosciences USA, Inc | 1 | $115 |
| 7d Surgical ULC | 1 | $112 |
| Longeviti Neuro Solutions Inc | 1 | $95 |
| Pfizer | 4 | $84 |
| AstraZeneca | 3 | $70 |
| KCI USA, Inc. | 1 | $55 |
| Highridge Medical LLC | 1 | $30 |
| Baxter Healthcare | 1 | $27 |
| Arteriocyte Medical Systems, Inc. | 1 | $24 |
| Johnson & Johnson | 1 | $23 |
| Zimvie Inc. | 1 | $22 |
| P Bar Medical LLC | 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.
- I-FACTOR PEPTIDE ENHANCED BONE GRAFT$14,356
- IFUSE IMPLANT SYSTEM$1,752
- O-ARM-ST$1,049
- OSTEOCOOL RF ABLATION$818
- Other - Miscellaneous$751
- INTELLIS ADAPTIVESTIM$568
- UNID_PASS$442
- iFuse Implant$249
- MazorX - Renaissance$181
- VISUALASE$171
- ENDOSKELETON TL NANOLOCK SURFACE TECHNOLOGY$162
- nanoLOCK-L$154
- MagnetOs$115
- 7D Surgical System$112
- KYPHON EXPRESS II KYPHOPAK TRAY$110
- INCEPTIV$108
How this compares
$92,174 in reported general payments places this provider in the 85th 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 |
|---|---|---|
| ForteoTeriparatide | 12 | $48,363 |
| Oxycodone-AcetaminophenOxycodone Hcl/Acetaminophen | 117 | $7,063 |
| Oxycodone Hcl | 117 | $2,225 |
| Tizanidine Hcl | 123 | $1,932 |
| Pregabalin | 42 | $1,514 |
| Hydrocodone-AcetaminophenHydrocodone/Acetaminophen | 86 | $1,292 |
| Methocarbamol | 79 | $1,243 |
| Morphine Sulfate | 21 | $614 |
| Cyclobenzaprine Hcl | 38 | $503 |
| Hydromorphone Hcl | 35 | $396 |
| Gabapentin | 19 | $240 |
| Methylprednisolone | 22 | $187 |
| Baclofen | 12 | $187 |
| Carisoprodol | 23 | $124 |
Paid to pharmacies, not to this prescriber.
Other neurological surgery in Tulsa
- Clinton BairdTulsa$621K
- Daniel HarwellTulsa$63K
- Mohammad Yashar KalaniTulsa$23K
- Kevin KlosTulsa$21K
- Tyler AuschwitzTulsa$17K
- Brian HoodTulsa$13K
- Shihao ZhangTulsa$8K
- Donald SchleicherTulsa$6K
- John MaroukTulsa$4K
- Scott DullTulsa$2K
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.