Channing Willoughby, MD
Pain Medicine · Murrells Inlet, SCNPI 1235336421
Payments from drug & device makers
What this record shows
The money is spread across several categories — consulting fees (47.9%), food and beverage and travel and lodging — rather than concentrated in one kind of arrangement. 33 manufacturers reported payments, led by Nalu Medical, Inc. at 55.6% of the total. Reporting peaked in 2024 at $22,428 and has fallen 50.1% since, to $11,182 in 2025. Among pain medicine clinicians in SC with any reported payments, this total sits in the top 5% — high for the specialty, which is a reason to read the composition above rather than the number alone.
Across 567 payments — averaging $143.90 each. Meals, travel, consulting and speaking fees, gifts and royalties reported by drug and device makers.
- Nalu Medical, Inc.$45K
- Abbott$13K
- Medtronic$10K
- Nevro Corp.$4K
- Saluda Medical Americas, Inc.$3K
- Boston Scientific$1K
- plus $5K from 27 others
What the payments were for
- Consulting fees$39,12348%
- Speaking & faculty fees$6,7808%
- Travel & lodging$9,85512%
- Food & beverage$25,83532%
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 |
|---|---|---|
| Nalu Medical, Inc. | 101 | $45,397 |
| Abbott | 70 | $13,106 |
| Medtronic(2 entities) | 172 | $9,943 |
| Nevro Corp. | 64 | $4,168 |
| Saluda Medical Americas, Inc. | 31 | $3,294 |
| Boston Scientific | 29 | $1,137 |
| Spinal Simplicity, LLC | 8 | $901 |
| MML US, Inc. | 5 | $614 |
| Globus Medical | 11 | $560 |
| SPR Therapeutics, Inc | 7 | $553 |
| Vertos Medical, Inc. | 7 | $270 |
| Salix Pharmaceuticals, A Division Of Bausch Health US, LLC | 16 | $265 |
| Relievant Medsystems, Inc. | 4 | $259 |
| Avanos Medical | 3 | $217 |
| Si-bone, Inc. | 2 | $190 |
| Biodelivery Sciences International, Inc. | 8 | $113 |
| AbbVie(2 entities) | 6 | $91 |
| GE HealthCare | 2 | $73 |
| Merz Pharmaceuticals, LLC | 2 | $71 |
| Collegium Pharmaceutical, Inc. | 3 | $55 |
| Stryker | 2 | $53 |
| Inari Medical, Inc. | 1 | $41 |
| Scilex Pharmaceuticals Inc. | 2 | $36 |
| Fidia Pharma USA Inc. | 2 | $27 |
| GRT US Holding, Inc. | 1 | $23 |
| Flowonix Medical Incorporated | 1 | $22 |
| Neurelis, Inc. | 1 | $19 |
| Novartis | 1 | $18 |
| Vertex | 1 | $17 |
| Redhill Biopharma Inc. | 1 | $16 |
| Biohaven Pharmaceuticals, Inc. | 1 | $15 |
| Orthogenrx Inc. | 1 | $15 |
| Daiichi Sankyo Inc. | 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.
- Nalu Neurostimulation System$43,776
- PROCLAIM$9,996
- INTELLIS ADAPTIVESTIM$2,702
- Evoke$2,568
- Senza Spinal Cord Stimulation System$1,566
- SYNCHROMED$1,486
- Senza$1,298
- ETERNA$1,204
- VANTA ADAPTIVESTIM$960
- HA MINUTEMAN G3-R$779
- INTELLIS$756
- OCTRODE$664
- Omnia$520
- ReActiv8$499
- Intracept$467
- SPRINT PNS System$419
- INCEPTIV$417
- WAVEWRITER ALPHA$385
- Evoke SCS$335
- iFuse Implant$150
How this compares
$81,593 in reported general payments places this provider in the 95th percentile of 92 pain medicine 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.
Most prescribed under Part D
| Drug | Claims | Cost to plans & patients |
|---|---|---|
| Hydrocodone-AcetaminophenHydrocodone/Acetaminophen | 1,494 | $36,375 |
| Oxycodone-AcetaminophenOxycodone Hcl/Acetaminophen | 1,045 | $31,880 |
| RelistorMethylnaltrexone Bromide | 12 | $19,829 |
| Gabapentin | 1,149 | $14,802 |
| Buprenorphine | 35 | $8,325 |
| Pregabalin | 400 | $7,725 |
| Tizanidine Hcl | 706 | $7,494 |
| MovantikNaloxegol Oxalate | 14 | $5,581 |
| Duloxetine Hcl | 259 | $5,287 |
| Diclofenac Sodium | 218 | $4,826 |
| Cyclobenzaprine Hcl | 384 | $3,262 |
| Morphine Sulfate ErMorphine Sulfate | 131 | $3,104 |
| Tramadol Hcl | 331 | $2,723 |
| Fentanyl | 29 | $2,605 |
| Lidocaine | 28 | $2,405 |
Paid to pharmacies, not to this prescriber.
Companies that both paid and supply prescribed drugs
These companies both reported payments to this provider and make drugs the provider prescribed under Medicare Part D in 2024. For most specialties this overlap is expected — a cardiologist who is paid by a cardiology drugmaker also treats heart disease. It is shown so the reader can see it, not because it implies anything on its own.
| Company | Paid to this provider | Part D cost of their drugs |
|---|---|---|
| Salix Pharmaceuticals, A Division Of Bausch Health US, LLCRelistor | $265 | $19,82912 claims |
| Redhill Biopharma Inc.Movantik | $16 | $5,58114 claims |
Reading this fairly. The Part D column is what drug plans and patients paid pharmacies — this provider received none of it, and it reflects how many patients they treat and what those drugs cost. Against peers, this provider's reported payments sit in the 95th percentile of 92 pain medicine providers in South Carolina.
Other pain medicine in Murrells Inlet
- Matthew DaviesMurrells Inlet$12K
- Brian YeeMurrells Inlet$12K
- Nicholas GentryMurrells Inlet$11K
- Phillip SmithGreenville$303K
- Richard KlineConway$104K
- Michael WarrickSumter$50K
- Daniel AtkinsonGreenville$36K
- Michael WardenFlorence$20K
- Andrew MendelsonCharleston$19K
- Sankeerth ChallagundlaColumbia$15K
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.