Caron Rigden, MD
Medical Oncology · Saint Peters, MONPI 1407903826
Payments from drug & device makers
What this record shows
This record is dominated by education: $80 of the $123 with a category attached, or 65.5%. 4 manufacturers reported payments, led by AstraZeneca at 55.8% of the total. That places this record below the midpoint for medical oncology clinicians in MO, where the typical reported total is $3,595.
Across 4 payments — averaging $30.71 each. Meals, travel, consulting and speaking fees, gifts and royalties reported by drug and device makers.
- AstraZeneca$68
- Sumitomo Pharma America, Inc.$23
- Merck$19
- Gilead$12
What the payments were for
- Food & beverage$4235%
- Education$8065%
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 |
|---|---|---|
| AstraZeneca | 1 | $68 |
| Sumitomo Pharma America, Inc. | 1 | $23 |
| Merck | 1 | $19 |
| Gilead | 1 | $12 |
How this compares
$123 in reported general payments places this provider in the 10th percentile of 144 medical oncology 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 |
|---|---|---|
| XtandiEnzalutamide | 23 | $321,096 |
| IbrancePalbociclib | 16 | $256,824 |
| KisqaliRibociclib Succinate | 17 | $254,262 |
| Everolimus | 15 | $194,131 |
| EliquisApixaban | 64 | $51,440 |
| Abiraterone Acetate | 53 | $12,195 |
| Letrozole | 246 | $9,359 |
| Octreotide Acetate | 12 | $8,153 |
| Exemestane | 29 | $2,811 |
| Ondansetron Hcl | 61 | $2,457 |
| Gabapentin | 115 | $2,186 |
| Tamoxifen Citrate | 57 | $1,487 |
| Prochlorperazine Maleate | 68 | $1,386 |
| Fentanyl | 16 | $1,226 |
| Ondansetron OdtOndansetron | 12 | $912 |
Paid to pharmacies, not to this prescriber.
Other medical oncology in Saint Peters
- Brian van TineSaint Peters$52K
- Tanya WildesSaint Peters$21K
- Ashley FrithSaint Peters$14K
- Leonid ShunyakovBolivar$2.1M
- Timothy PluardKansas City$664K
- Brad KahlSaint Louis$336K
- Michael NaughtonCape Girardeau$249K
- Russell PachynskiSaint Louis$226K
- Mark SchroederSaint Louis$198K
- George AnsstasSaint Louis$189K
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.