William Birenbaum, MD
Internal Medicine · Saint Louis, MONPI 1407876550
Payments from drug & device makers
Across 174 payments — averaging $15.82 each. Meals, travel, consulting and speaking fees, gifts and royalties reported by drug and device makers.
- AbbVie$409
- Pfizer$322
- Lilly USA, LLC$225
- GSK$202
- Salix Pharmaceuticals, A Division Of Bausch Health US, LLC$167
- Novo Nordisk$163
- plus $1K from 21 others
What the payments were for
- Food & beverage$2,753100%
Most of this is food and beverage — typically meals provided during product presentations at a clinic or hospital. Nationally that is the single largest category of reported payments by count.
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 |
|---|---|---|
| AbbVie(2 entities) | 21 | $409 |
| Pfizer | 24 | $322 |
| Lilly USA, LLC | 13 | $225 |
| GSK | 13 | $202 |
| Salix Pharmaceuticals, A Division Of Bausch Health US, LLC | 11 | $167 |
| Novo Nordisk | 10 | $163 |
| E.r. Squibb & Sons, L.L.C. | 9 | $146 |
| Amgen | 8 | $144 |
| Abbott | 9 | $131 |
| Sanofi-aventis U.S. LLC | 8 | $112 |
| Novartis | 8 | $111 |
| Johnson & Johnson(2 entities) | 8 | $108 |
| AstraZeneca | 6 | $82 |
| Merck | 4 | $65 |
| Kowa Pharmaceuticals America, Inc. | 4 | $51 |
| Bayer | 2 | $47 |
| Sunovion Pharmaceuticals Inc. | 3 | $44 |
| Astellas Pharma US Inc | 2 | $41 |
| Boehringer Ingelheim | 3 | $39 |
| Corcept Therapeutics | 1 | $26 |
| Lundbeck LLC | 1 | $23 |
| Esperion Therapeutics, Inc. | 1 | $21 |
| Sumitomo Pharma America, Inc. | 1 | $20 |
| Amarin Pharma, Inc. | 1 | $17 |
| Exact Sciences | 1 | $14 |
| Insulet Corporation | 1 | $11 |
| Takeda Pharmaceuticals U.S.A., Inc. | 1 | $11 |
How this compares
$2,753 in reported general payments places this provider in the 80th percentile of 2,097 internal medicine 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 |
|---|---|---|
| EliquisApixaban | 235 | $193,726 |
| Trelegy ElliptaFluticasone/Umeclidin/Vilanter | 101 | $91,431 |
| OzempicSemaglutide | 72 | $75,634 |
| XareltoRivaroxaban | 63 | $61,177 |
| MounjaroTirzepatide | 39 | $51,044 |
| Soliqua 100-33Insulin Glargine/Lixisenatide | 31 | $39,635 |
| ArexvyRsvpref3 Antigen/As01e/Pf | 92 | $24,310 |
| Breo ElliptaFluticasone/Vilanterol | 41 | $20,302 |
| Oxymorphone Hcl ErOxymorphone Hcl | 12 | $19,742 |
| MyrbetriqMirabegron | 50 | $19,634 |
| JanuviaSitagliptin Phosphate | 26 | $16,733 |
| Humalog Kwikpen U-100Insulin Lispro | 35 | $14,535 |
| Anoro ElliptaUmeclidinium Brm/Vilanterol Tr | 11 | $9,553 |
| FarxigaDapagliflozin Propanediol | 13 | $8,703 |
| Lantus SolostarInsulin Glargine,hum.Rec.Anlog | 53 | $8,521 |
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 |
|---|---|---|
| PfizerEliquis, Abrysvo | $322 | $196,536246 claims |
| GSKTrelegy Ellipta, Arexvy, Breo Ellipta, Anoro Ellipta | $202 | $145,596245 claims |
| Novo NordiskOzempic | $163 | $75,63472 claims |
| Johnson & JohnsonXarelto | $108 | $61,17763 claims |
| Lilly USA, LLCMounjaro | $225 | $51,04439 claims |
| Sanofi-aventis U.S. LLCSoliqua 100-33 | $112 | $39,63531 claims |
| Astellas Pharma US IncMyrbetriq | $41 | $19,63450 claims |
| MerckJanuvia | $65 | $16,73326 claims |
| AstraZenecaFarxiga, Symbicort | $82 | $14,22928 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 80th percentile of 2,097 internal medicine providers in Missouri.
Other internal medicine in Saint Louis
- Michael ReschakSaint Louis$3.1M
- David PrelutskySaint Louis$575K
- Danish JabbarSaint Louis$510K
- Hany SalamaSaint Louis$279K
- Lauren LevineSaint Louis$264K
- Brij VaidSaint Louis$213K
- Vinay KamatSaint Louis$191K
- Tracy NorfleetSaint Louis$132K
- Paul OlivoSaint Louis$98K
- Priyanka RavalSaint Louis$95K
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.