Jon Gertken, MD
Physical Medicine & Rehabilitation · Saint Joseph, MONPI 1669670501
Payments from drug & device makers
What this record shows
This record is dominated by consulting fees: $4,400 of the $5,688 with a category attached, or 77.4%. GRT US Holding, Inc. accounts for 83.0% of it on its own, with 8 other manufacturers making up the rest. Reporting peaked in 2021 at $4,718 and has fallen 96.2% since, to $178 in 2025. Among physical medicine & rehabilitation clinicians in MO with any reported payments, this total sits in the top 10% — high for the specialty, which is a reason to read the composition above rather than the number alone.
Across 60 payments — averaging $94.80 each. Meals, travel, consulting and speaking fees, gifts and royalties reported by drug and device makers.
- GRT US Holding, Inc.$5K
- AbbVie$634
- Microtransponder, Inc.$86
- Sanofi-aventis U.S. LLC$71
- SPR Therapeutics, Inc$71
- Merz North America, Inc.$43
- plus $60 from 3 others
What the payments were for
- Consulting fees$4,40077%
- Food & beverage$1,28823%
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 |
|---|---|---|
| GRT US Holding, Inc. | 25 | $4,722 |
| AbbVie(2 entities) | 21 | $634 |
| Microtransponder, Inc. | 1 | $86 |
| Sanofi-aventis U.S. LLC | 5 | $71 |
| SPR Therapeutics, Inc | 1 | $71 |
| Merz North America, Inc. | 3 | $43 |
| Pfizer | 2 | $26 |
| Vertex | 1 | $19 |
| Amgen | 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.
How this compares
$5,688 in reported general payments places this provider in the 90th percentile of 182 physical medicine & rehabilitation providers in Missouri.
See all physical medicine & rehabilitation providers in Missouri →
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 |
|---|---|---|
| Gabapentin | 385 | $5,198 |
| Baclofen | 300 | $4,500 |
| Pregabalin | 223 | $3,714 |
| Chlorzoxazone | 34 | $1,899 |
| Hydrocodone-AcetaminophenHydrocodone/Acetaminophen | 96 | $1,747 |
| Lidocaine | 24 | $1,562 |
| Celecoxib | 77 | $1,230 |
| Tramadol Hcl | 131 | $906 |
| Duloxetine Hcl | 61 | $853 |
| Tizanidine Hcl | 74 | $623 |
| Amitriptyline Hcl | 28 | $440 |
| Oxycodone Hcl | 23 | $152 |
| Tramadol Hcl-AcetaminophenTramadol Hcl/Acetaminophen | 13 | $112 |
| Cyclobenzaprine Hcl | 11 | $103 |
| Diazepam | 12 | $12 |
Paid to pharmacies, not to this prescriber.
Other physical medicine & rehabilitation in Saint Joseph
- Peter DawsonSaint Joseph$1K
- Suzan LisenbySaint Joseph$389
- Lizette AlvarezSaint Louis$182K
- Heidi HunterCape Girardeau$150K
- Constantine FotopoulosKansas City$91K
- Joseph BurrisColumbia$75K
- Alexander ChamessianCreve Coeur$55K
- Jane EmersonColumbia$44K
- Reza FaridColumbia$37K
- Nathan KenyonJefferson City$24K
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.