Jan Vargas Machaj, MD
Neurological Surgery · Greenville, SCNPI 1225323488
Payments from drug & device makers
Across 377 payments — averaging $1741.29 each. Meals, travel, consulting and speaking fees, gifts and royalties reported by drug and device makers.
- Imperative Care, Inc$432K
- Viz.ai, Inc.$112K
- Medical Device Business Services, Inc.$26K
- Qapel Medical Inc$25K
- Penumbra, Inc.$17K
- Siemens Medical Solutions USA, Inc.$16K
- plus $29K from 12 others
What the payments were for
- Royalty or licence$107,30052%
- Consulting fees$65,38532%
- Speaking & faculty fees$8,8684%
- Travel & lodging$11,0645%
- Food & beverage$14,5667%
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 |
|---|---|---|
| Imperative Care, Inc | 88 | $431,532 |
| Viz.ai, Inc. | 10 | $112,230 |
| Medical Device Business Services, Inc. | 35 | $25,961 |
| Qapel Medical Inc | 7 | $24,993 |
| Penumbra, Inc. | 25 | $16,972 |
| Siemens Medical Solutions USA, Inc. | 46 | $16,157 |
| Medtronic(2 entities) | 92 | $9,581 |
| Integra Lifesciences Corporation | 4 | $6,217 |
| Scientia Vascular | 3 | $5,035 |
| Microvention, Inc. | 16 | $4,729 |
| Stryker | 16 | $898 |
| Johnson & Johnson | 24 | $846 |
| Corindus Inc. | 5 | $407 |
| Depuy Synthes Products, Inc. | 1 | $375 |
| Inspiremd Ltd | 2 | $336 |
| Rapid Medical Ltd | 1 | $148 |
| Shockwave Medical, Inc | 1 | $28 |
| Cordis US CORP. | 1 | $22 |
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.
- Viz.AI LVO$112,035
- CorPath GRX$9,465
- Pipeline$7,466
- CODMAN CERTAS$6,000
- DURASEAL EXACT$6,000
- CODMAN HAKIM PRECISION VALVE$6,000
- CUSA CLARITY$6,000
- ZOOM RDL RADIAL ACCESS SYSTEM, 103CM$4,296
- CorPath Imaging System$4,000
- EMBOGUARD$3,395
- TracStarLargeDistalPlatform$3,320
- Zoom88LargeDistalPlatform$3,320
- Zoom88_TLargeDitalPlatform$3,320
- ZoomReperfusionCatheter$3,320
- ZOOM 88-T LARGE DISTAL PLATFORM$2,420
- Penumbra System$983
- WEB$560
- STENT$554
- Embotrap$479
- ZOOM REPERFUSION CATHETER$385
How this compares
$656,468 in reported general payments places this provider in the 95th percentile of 114 neurological surgery providers in South Carolina.
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 Greenville
- Charles OpalakGreenville$94K
- James WigintonGreenville$18K
- Tyler SparksGreenville$16K
- Christie MinaGreenville$13K
- Samuel AsanteGreenville$12K
- Phillip HodgeGreenville$10K
- Sharon WebbGreenville$5K
- Earl TroupGreenville$3K
- Alejandro SpiottaCharleston$1.6M
- David JonesRock Hill$541K
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.