Andrew Davis, MD
Medical Oncology · Florissant, MONPI 1417374604
Payments from drug & device makers
What this record shows
This record is dominated by speaking fees: $1,260 of the $1,559 with a category attached, or 80.8%. Pfizer accounts for 87.5% of it on its own, with 4 other manufacturers making up the rest. Reporting peaked in 2022 at $1,384 and has fallen 91.2% since, to $121 in 2025. That places this record below the midpoint for medical oncology clinicians in MO, where the typical reported total is $3,595.
Across 7 payments — averaging $222.73 each. Meals, travel, consulting and speaking fees, gifts and royalties reported by drug and device makers.
- Pfizer$1K
- Exelixis Inc.$121
- Merck$34
- Lilly USA, LLC$21
- EMD Serono, Inc.$18
Across 190 payments — averaging $6290.70 each. Payments tied to a research study. These frequently flow through the physician to a hospital or research institution rather than to the physician personally.
- AbbVie$427K
- AstraZeneca$351K
- E.r. Squibb & Sons, L.L.C.$212K
- Immunogen, Inc.$106K
- Merck$35K
- Genentech, Inc.$33K
- plus $31K from 3 others
What the payments were for
- Speaking & faculty fees$1,26081%
- Food & beverage$29919%
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 |
|---|---|---|
| Pfizer | 2 | $1,365 |
| Exelixis Inc. | 1 | $121 |
| Merck | 2 | $34 |
| Lilly USA, LLC | 1 | $21 |
| EMD Serono, Inc. | 1 | $18 |
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
$1,559 in reported general payments places this provider in the 40th 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 |
|---|---|---|
| IbrancePalbociclib | 61 | $991,982 |
| TruqapCapivasertib | 11 | $167,866 |
| EliquisApixaban | 42 | $27,072 |
| Anastrozole | 451 | $5,899 |
| Exemestane | 54 | $5,513 |
| Letrozole | 92 | $2,972 |
| Prochlorperazine Maleate | 44 | $1,070 |
| Tamoxifen Citrate | 24 | $712 |
| Gabapentin | 38 | $444 |
| Dexamethasone | 42 | $327 |
| Ondansetron Hcl | 29 | $264 |
| LoperamideLoperamide Hcl | 18 | $245 |
| Oxycodone Hcl | 22 | $202 |
| Hydrocodone-AcetaminophenHydrocodone/Acetaminophen | 11 | $194 |
| Venlafaxine Hcl ErVenlafaxine Hcl | 11 | $176 |
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 |
|---|---|---|
| PfizerIbrance, Eliquis | $1,365 | $1,019,054103 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 40th percentile of 144 medical oncology providers in Missouri.
Other medical oncology in Florissant
- 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
- Ravi VijSaint Louis$153K
- Douglas AdkinsSaint Louis$141K
- Milan ChhedaSaint Louis$105K
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.