Deron Ludwig, MD
Surgery · Missoula, MTNPI 1245310200
Payments from drug & device makers
What this record shows
The money is spread across several categories — education (57.4%), travel and lodging and food and beverage — rather than concentrated in one kind of arrangement. Intuitive Surgical accounts for 98.5% of it on its own, with 3 other manufacturers making up the rest. Reporting peaked in 2024 at $11,689 and has fallen 74.6% since, to $2,969 in 2025.
Across 47 payments — averaging $315.31 each. Meals, travel, consulting and speaking fees, gifts and royalties reported by drug and device makers.
- Intuitive Surgical$15K
- Medtronic$151
- Novo Nordisk$44
- Medical Device Business Services, Inc.$28
What the payments were for
- Travel & lodging$4,85633%
- Food & beverage$1,46410%
- Education$8,50057%
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 |
|---|---|---|
| Intuitive Surgical | 40 | $14,596 |
| Medtronic | 3 | $151 |
| Novo Nordisk | 3 | $44 |
| Medical Device Business Services, Inc. | 1 | $28 |
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.
- DAVINCI XI$8,500
- Da Vinci Surgical System$5,517
How this compares
$14,819 in reported general payments places this provider in the 80th percentile of 96 surgery providers in Montana.
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 |
|---|---|---|
| Omeprazole | 63 | $274 |
| Ondansetron OdtOndansetron | 40 | $244 |
| Oxycodone Hcl | 44 | $73 |
| Cyclobenzaprine Hcl | 39 | $68 |
| Pantoprazole Sodium | 14 | $63 |
Paid to pharmacies, not to this prescriber.
Other surgery in Missoula
- Matthew SilvaMissoula$59K
- Christopher MakiMissoula$17K
- John PickhardtMissoula$13K
- Louis KattineMissoula$10K
- Stacie CampoMissoula$9K
- Michael ZehnpfennigMissoula$8K
- Tarin WorrestMissoula$7K
- Dillon MorrisMissoula$7K
- Kelsi SwansonMissoula$7K
- David BellamahMissoula$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.