Richard Grinstead, DO
Vascular & Interventional Radiology · Florence, SCNPI 1578795290
Payments from drug & device makers
What this record shows
The money is spread across several categories — food and beverage (31.2%), speaking fees and consulting fees — rather than concentrated in one kind of arrangement. 25 manufacturers reported payments, led by Okami Medical, Inc. at 28.4% of the total. Reporting peaked in 2024 at $8,310 and has fallen 60.8% since, to $3,259 in 2025.
Across 177 payments — averaging $128.92 each. Meals, travel, consulting and speaking fees, gifts and royalties reported by drug and device makers.
- Okami Medical, Inc.$6K
- Shimadzu Precision Instruments, Inc.$6K
- Penumbra, Inc.$2K
- Terumo Medical Corporation$1K
- Sirtex Medical Inc$1K
- Inari Medical, Inc.$1K
- plus $4K from 19 others
What the payments were for
- Consulting fees$5,05022%
- Speaking & faculty fees$6,43828%
- Travel & lodging$4,20418%
- Food & beverage$7,12731%
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 |
|---|---|---|
| Okami Medical, Inc. | 24 | $6,482 |
| Shimadzu Precision Instruments, Inc. | 2 | $6,438 |
| Penumbra, Inc. | 10 | $2,436 |
| Terumo Medical Corporation | 14 | $1,241 |
| Sirtex Medical Inc | 23 | $1,220 |
| Inari Medical, Inc. | 19 | $1,198 |
| Argon Medical Devices, Inc. | 2 | $1,150 |
| Trisalus Life Sciences, Inc. | 20 | $530 |
| Boston Scientific | 21 | $420 |
| Medtronic | 3 | $356 |
| Inceptus Medical, LLC | 1 | $263 |
| W. L. Gore & Associates, Inc. | 10 | $191 |
| Stryker | 3 | $169 |
| Cook Medical LLC | 5 | $131 |
| Philips North America LLC | 4 | $100 |
| Advanced Critical Devices, Inc. | 1 | $97 |
| Si-bone, Inc. | 1 | $96 |
| Bard Peripheral Vascular, Inc. | 6 | $93 |
| Palette Life Sciences, Inc. | 1 | $45 |
| Thrombolex, Inc. | 2 | $42 |
| AstraZeneca | 1 | $29 |
| Cardiva Medical, Inc. | 1 | $29 |
| CMS Imaging, Inc. | 1 | $26 |
| Biosense Webster, Inc. | 1 | $22 |
| BD | 1 | $15 |
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.
- LOBO$6,175
- Indigo System$2,261
- CLEANER$1,150
- FLOWTRIEVER CATHETER, S$707
- CT THROMBECTOMY SYSTEM KIT$707
- LAVA LES (Liquid Embolic System)$373
- SIR-Spheres Microspheres$337
- IN.PACT Admiral$169
- TRINAV INFUSION SYSTEM$130
- GENERAL - IO ABLATION$129
- FlowTriever$128
- ClotTriever$128
- Abre$109
How this compares
$22,820 in reported general payments places this provider in the 85th percentile of 61 vascular & interventional radiology providers in South Carolina.
See all vascular & interventional radiology 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 vascular & interventional radiology in Florence
- Marcelo GuimaraesCharleston$609K
- Nilesh PatelMyrtle Beach$201K
- Aron DevaneGreenville$112K
- Ricardo YamadaCharleston$73K
- Claudio SchonholzCharleston$53K
- Antony GayedGreenville$37K
- Chauncy HandranGreenville$23K
- Jonathan HinshelwoodGreenville$23K
- Michael LudkowskiGreenville$16K
- Matthew GossageGreenville$12K
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.