Payment overview · 2025
General Payments
$18.81
1 reported records · 1 companies
Healthcare provider profile · identity verified
William D Birenbaum, M.D.
Allopathic & Osteopathic Physicians|Internal Medicine · SAINT LOUIS, MO · NPI 1407876550
Verified facts
What the public records show
CMS Open Payments records show William D Birenbaum, M.D. received $18.81 in general payments during 2025 across 1 reported records.
PFIZER INC. accounted for 100.0% of that reported general-payment amount.
The Open Payments records used for this analysis explicitly named 2 associated products.
A separate comparison found the same explicitly named product in public Medicare Part D data: Eliquis.
PFIZER INC. reported payments to this doctor in 2025. Across the 2025 Open Payments General Payment records loaded for this analysis, that same reporting entity reported ABRYSVO as an associated drug or biological on 55380 records involving 31565 distinct recipient NPIs. Public Medicare Part D data also shows 11 claims for Abrysvo by this doctor in 2024.
PFIZER INC. reported payments to this doctor in 2025. Across the 2025 Open Payments General Payment records loaded for this analysis, that same reporting entity reported ELIQUIS as an associated drug or biological on 87112 records involving 36032 distinct recipient NPIs. Public Medicare Part D data also shows 235 claims for Eliquis by this doctor in 2024.
These records do not establish that a payment influenced prescribing or medical care.
Separate record types
Research & Ownership
Research Payments (direct recipient): not present in the loaded data
Associated Research Funding (for example, named PI): not present in the loaded data
Ownership / Investment: not present in the loaded data
These categories are never added into the General Payments headline. Associated research funding must not be described as money the doctor personally received unless the source record supports that conclusion.
Who paid this doctor?
Companies in 2025 General Payments
| Reported company | Canonical company | Amount | Share | Records | Year |
|---|---|---|---|---|---|
| PFIZER INC. | Unresolved — no canonical attribution shown | $18.81 | 100.0% | 1 | 2025 |
What were the payments for?
Payment categories
| Category | Amount | Records |
|---|---|---|
| Food and Beverage | $18.81 | 1 |
A meal, consulting fee, royalty, and travel payment describe different kinds of reported relationships and should not be interpreted as equivalent.
Analysis 1 · Payment-linked products
Products named in Open Payments records
| Reported product | Type | Reported company | Related amount* | Records | Year |
|---|---|---|---|---|---|
| ELIQUIS Normalized: eliquis |
Drug | PFIZER INC. | $18.81 | 1 | 2025 |
Source payment records
|
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| NURTEC ODT Normalized: nurtec odt |
Drug | PFIZER INC. | $18.81 | 1 | 2025 |
Source payment records
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* Product-associated amounts are non-additive because one payment record may name more than one product.
These products were named on specific Open Payments records. A named product does not show that the payment influenced treatment or prescribing.
Public prescribing for products named in payments
| Open Payments product | Payment year | Part D brand | Part D year | Claims | Match method | Source |
|---|---|---|---|---|---|---|
| ELIQUIS eliquis |
2025 | Eliquis | 2024 | 235 | exact normalized | Medicare Part D |
The presence of the same drug in both datasets does not show that a payment caused or influenced a prescription.
Analysis 2 · Same-company prescribing overlap
Drugs reported in other payments from the same company that also appear in Medicare Part D
This analysis is independent from products named on this doctor’s individual payment records. A row appears only when the exact Open Payments reporting entity paid this doctor, that same reporting entity reported the drug or biological on at least 10 loaded General Payment records involving at least 2 distinct recipient NPIs, and this doctor has the same non-generic brand in public Part D data. This does not mean the company owns or manufactures the drug.
| Paying company | Payment year | Drug reported by same entity | Open Payments evidence | Part D | Claims | Beneficiaries |
|---|---|---|---|---|---|---|
| PFIZER INC. Exact reporting entity; no affiliate inference |
2025 | ABRYSVO open payments reported associated product |
CMS Open Payments — General Payments 55380 supporting records · 31565 recipient NPIs · example record 1228794147 |
Abrysvo · 2024 Exact normalized brand match · 1 Part D row |
11 | 11 |
| PFIZER INC. Exact reporting entity; no affiliate inference |
2025 | ELIQUIS open payments reported associated product |
CMS Open Payments — General Payments 87112 supporting records · 36032 recipient NPIs · example record 1228794063 |
Eliquis · 2024 Exact normalized brand match · 1 Part D row |
235 | 41 |
These facts do not show that a payment was for the drug, that the company owns or manufactures the drug, or that a payment caused or influenced prescribing.
Public Medicare Part D data
Provider-and-drug rows loaded for 2024
| Brand | Generic | Claims | Beneficiaries |
|---|---|---|---|
| Atorvastatin Calcium | Atorvastatin Calcium | 875 | 244 |
| Amlodipine Besylate | Amlodipine Besylate | 613 | 154 |
| Lisinopril | Lisinopril | 470 | 133 |
| Losartan Potassium | Losartan Potassium | 423 | 101 |
| Omeprazole | Omeprazole | 396 | 107 |
| Tamsulosin Hcl | Tamsulosin Hcl | 388 | 100 |
| Levothyroxine Sodium | Levothyroxine Sodium | 380 | 97 |
| Metoprolol Succinate | Metoprolol Succinate | 334 | 82 |
| Tramadol Hcl | Tramadol Hcl | 314 | 81 |
| Meloxicam | Meloxicam | 290 | 84 |
| Metformin Hcl | Metformin Hcl | 268 | 73 |
| Hydrochlorothiazide | Hydrochlorothiazide | 245 | 71 |
| Alprazolam | Alprazolam | 240 | 55 |
| Eliquis | Apixaban | 235 | 41 |
| Rosuvastatin Calcium | Rosuvastatin Calcium | 233 | 67 |
| Simvastatin | Simvastatin | 225 | 60 |
| Furosemide | Furosemide | 212 | 54 |
| Gabapentin | Gabapentin | 212 | 64 |
| Trazodone Hcl | Trazodone Hcl | 207 | 55 |
| Pantoprazole Sodium | Pantoprazole Sodium | 189 | 52 |
| Famotidine | Famotidine | 164 | 41 |
| Fluticasone Propionate | Fluticasone Propionate | 159 | 69 |
| Finasteride | Finasteride | 152 | 43 |
| Montelukast Sodium | Montelukast Sodium | 150 | 36 |
| Glimepiride | Glimepiride | 148 | 34 |
| Prednisone | Prednisone | 145 | 83 |
| Hydrocodone-Acetaminophen | Hydrocodone/Acetaminophen | 142 | 33 |
| Potassium Chloride | Potassium Chloride | 141 | 40 |
| Zolpidem Tartrate | Zolpidem Tartrate | 141 | 41 |
| Metoprolol Tartrate | Metoprolol Tartrate | 130 | 39 |
| Warfarin Sodium | Warfarin Sodium | 116 | 19 |
| Escitalopram Oxalate | Escitalopram Oxalate | 108 | 34 |
| Celecoxib | Celecoxib | 101 | 24 |
| Trelegy Ellipta | Fluticasone/Umeclidin/Vilanter | 101 | 19 |
| Allopurinol | Allopurinol | 100 | 29 |
| Albuterol Sulfate Hfa | Albuterol Sulfate | 98 | 40 |
| Clopidogrel | Clopidogrel Bisulfate | 98 | 28 |
| Duloxetine Hcl | Duloxetine Hcl | 98 | 26 |
| Alendronate Sodium | Alendronate Sodium | 94 | 25 |
| Arexvy | Rsvpref3 Antigen/As01e/Pf | 92 | 92 |
| Sertraline Hcl | Sertraline Hcl | 91 | 25 |
| Tizanidine Hcl | Tizanidine Hcl | 91 | 20 |
| Doxazosin Mesylate | Doxazosin Mesylate | 90 | 26 |
| Pregabalin | Pregabalin | 89 | 26 |
| Triamterene-Hydrochlorothiazid | Triamterene/Hydrochlorothiazid | 88 | 28 |
| Atenolol | Atenolol | 87 | 23 |
| Citalopram Hbr | Citalopram Hydrobromide | 84 | 27 |
| Donepezil Hcl | Donepezil Hcl | 82 | 22 |
| Oxycodone Hcl | Oxycodone Hcl | 81 | 25 |
| Lorazepam | Lorazepam | 79 | 21 |
| Metformin Hcl Er | Metformin Hcl | 78 | 24 |
| Ozempic | Semaglutide | 72 | 13 |
| Bupropion Xl | Bupropion Hcl | 71 | 19 |
| Ipratropium Bromide | Ipratropium Bromide | 69 | 24 |
| Carvedilol | Carvedilol | 67 | 22 |
| Pravastatin Sodium | Pravastatin Sodium | 66 | 21 |
| Ezetimibe | Ezetimibe | 63 | 19 |
| Torsemide | Torsemide | 63 | 17 |
| Xarelto | Rivaroxaban | 63 | 13 |
| Lisinopril-Hydrochlorothiazide | Lisinopril/Hydrochlorothiazide | 60 | 16 |
| Amitriptyline Hcl | Amitriptyline Hcl | 59 | 15 |
| Colestipol Hcl | Colestipol Hcl | 54 | 15 |
| Ondansetron Odt | Ondansetron | 54 | 23 |
| Lantus Solostar | Insulin Glargine,hum.Rec.Anlog | 53 | 15 |
| Isosorbide Mononitrate Er | Isosorbide Mononitrate | 52 | 14 |
| Temazepam | Temazepam | 52 | suppressed |
| Diazepam | Diazepam | 51 | 13 |
| Myrbetriq | Mirabegron | 50 | suppressed |
| Hydralazine Hcl | Hydralazine Hcl | 48 | suppressed |
| Diltiazem 24hr Er (Xr) | Diltiazem Hcl | 47 | 13 |
| Oxybutynin Chloride | Oxybutynin Chloride | 47 | 18 |
| Mirtazapine | Mirtazapine | 46 | 14 |
| Quetiapine Fumarate | Quetiapine Fumarate | 46 | 12 |
| Synthroid | Levothyroxine Sodium | 44 | 12 |
| Breo Ellipta | Fluticasone/Vilanterol | 41 | 12 |
| Oxycodone-Acetaminophen | Oxycodone Hcl/Acetaminophen | 41 | suppressed |
| Mounjaro | Tirzepatide | 39 | suppressed |
| Morphine Sulfate Er | Morphine Sulfate | 38 | suppressed |
| Nortriptyline Hcl | Nortriptyline Hcl | 38 | suppressed |
| Losartan-Hydrochlorothiazide | Losartan/Hydrochlorothiazide | 37 | suppressed |
| Diltiazem 24hr Er (Cd) | Diltiazem Hcl | 36 | suppressed |
| Hydroxyzine Hcl | Hydroxyzine Hcl | 36 | suppressed |
| Azelastine Hcl | Azelastine Hcl | 35 | 16 |
| Baclofen | Baclofen | 35 | suppressed |
| Humalog Kwikpen U-100 | Insulin Lispro | 35 | suppressed |
| Triamcinolone Acetonide | Triamcinolone Acetonide | 35 | 21 |
| Amoxicillin-Clavulanate Potass | Amoxicillin/Potassium Clav | 34 | 30 |
| Cyclobenzaprine Hcl | Cyclobenzaprine Hcl | 32 | 15 |
| Dextroamphetamine-Amphet Er | Dextroamphetamine/Amphetamine | 31 | suppressed |
| Dicyclomine Hcl | Dicyclomine Hcl | 31 | suppressed |
| Lovastatin | Lovastatin | 31 | suppressed |
| Soliqua 100-33 | Insulin Glargine/Lixisenatide | 31 | suppressed |
| Doxycycline Hyclate | Doxycycline Hyclate | 30 | 19 |
| Fluoxetine Hcl | Fluoxetine Hcl | 30 | suppressed |
| Paroxetine Hcl | Paroxetine Hcl | 30 | suppressed |
| Clotrimazole-Betamethasone | Clotrimazole/Betamethasone Dip | 29 | 16 |
| Clonazepam | Clonazepam | 28 | 12 |
| Diclofenac Sodium | Diclofenac Sodium | 28 | 12 |
| Dextroamphetamine-Amphetamine | Dextroamphetamine/Amphetamine | 27 | suppressed |
| Buspirone Hcl | Buspirone Hcl | 26 | suppressed |
| Januvia | Sitagliptin Phosphate | 26 | suppressed |
| Ketoconazole | Ketoconazole | 26 | suppressed |
| Spironolactone | Spironolactone | 26 | suppressed |
| Azithromycin | Azithromycin | 25 | 25 |
| Memantine Hcl | Memantine Hcl | 25 | suppressed |
| Meclizine Hcl | Meclizine Hcl | 24 | 14 |
| Amiodarone Hcl | Amiodarone Hcl | 23 | suppressed |
| Amlodipine Besylate-Benazepril | Amlodipine Besylate/Benazepril | 23 | suppressed |
| Insulin Aspart Flexpen | Insulin Aspart | 23 | suppressed |
| Nifedipine Er | Nifedipine | 23 | suppressed |
| Nitrofurantoin Mono-Macro | Nitrofurantoin Monohyd/M-Cryst | 23 | 19 |
| Valacyclovir | Valacyclovir Hcl | 23 | 13 |
| Propranolol Hcl | Propranolol Hcl | 22 | suppressed |
| Glipizide | Glipizide | 21 | suppressed |
| Ventolin Hfa | Albuterol Sulfate | 21 | suppressed |
| Zolpidem Tartrate Er | Zolpidem Tartrate | 21 | suppressed |
| Dilt-Xr | Diltiazem Hcl | 20 | suppressed |
| Mupirocin | Mupirocin | 20 | 11 |
| Nano 2nd Gen Pen Needle | Pen Needle, Diabetic | 20 | suppressed |
| Esomeprazole Magnesium | Esomeprazole Magnesium | 19 | suppressed |
| Etodolac | Etodolac | 19 | suppressed |
| Fenofibrate | Fenofibrate | 19 | suppressed |
| Klor-Con M20 | Potassium Chloride | 19 | suppressed |
| Oxybutynin Chloride Er | Oxybutynin Chloride | 19 | suppressed |
| Cephalexin | Cephalexin | 18 | 13 |
| Valsartan | Valsartan | 18 | suppressed |
| Methylprednisolone | Methylprednisolone | 16 | 16 |
| Ramipril | Ramipril | 16 | suppressed |
| Tramadol Hcl-Acetaminophen | Tramadol Hcl/Acetaminophen | 16 | suppressed |
| Nitroglycerin | Nitroglycerin | 15 | 14 |
| Symbicort | Budesonide/Formoterol Fumarate | 15 | suppressed |
| Venlafaxine Hcl Er | Venlafaxine Hcl | 15 | suppressed |
| Acyclovir | Acyclovir | 14 | suppressed |
| Divalproex Sodium | Divalproex Sodium | 14 | suppressed |
| Eszopiclone | Eszopiclone | 14 | suppressed |
| Levetiracetam | Levetiracetam | 14 | suppressed |
| Levocetirizine Dihydrochloride | Levocetirizine Dihydrochloride | 14 | suppressed |
| Primidone | Primidone | 14 | suppressed |
| Ultra-Fine Short Pen Needle | Pen Needle, Diabetic | 14 | suppressed |
| Anastrozole | Anastrozole | 13 | suppressed |
| Budesonide-Formoterol Fumarate | Budesonide/Formoterol Fumarate | 13 | suppressed |
| Carisoprodol | Carisoprodol | 13 | suppressed |
| Cefuroxime | Cefuroxime Axetil | 13 | 13 |
| Farxiga | Dapagliflozin Propanediol | 13 | suppressed |
| Fenofibrate | Fenofibrate Nanocrystallized | 13 | suppressed |
| Levofloxacin | Levofloxacin | 13 | 12 |
| Sulfamethoxazole-Trimethoprim | Sulfamethoxazole/Trimethoprim | 13 | 12 |
| Cefdinir | Cefdinir | 12 | 12 |
| Clotrimazole | Clotrimazole | 12 | suppressed |
| Irbesartan | Irbesartan | 12 | suppressed |
| Labetalol Hcl | Labetalol Hcl | 12 | suppressed |
| Morphine Sulfate | Morphine Sulfate | 12 | suppressed |
| Olanzapine | Olanzapine | 12 | suppressed |
| Oxymorphone Hcl Er | Oxymorphone Hcl | 12 | suppressed |
| Repatha Sureclick | Evolocumab | 12 | suppressed |
| Terazosin Hcl | Terazosin Hcl | 12 | suppressed |
| Ultra-Fine Nano Pen Needle | Pen Needle, Diabetic | 12 | suppressed |
| Abrysvo | Rsv Vacc, Pref A And Pref B/Pf | 11 | 11 |
| Anoro Ellipta | Umeclidinium Brm/Vilanterol Tr | 11 | suppressed |
| Chlorhexidine Gluconate | Chlorhexidine Gluconate | 11 | suppressed |
| Enalapril Maleate | Enalapril Maleate | 11 | suppressed |
| Novolog Mix 70-30 | Insulin Aspart Prot/Insuln Asp | 11 | suppressed |
| Ondansetron Hcl | Ondansetron Hcl | 11 | suppressed |
| Risperidone | Risperidone | 11 | suppressed |
Timeline
Payment and prescribing data by year
Open Payments and Medicare Part D may refer to different years. They are shown separately rather than aligned as if they describe the same period.
| Year | General Payments | Main payer | Explicit products | Company overlaps | Part D coverage |
|---|---|---|---|---|---|
| 2025 | $18.81 · 1 records | PFIZER INC. | ELIQUIS, NURTEC ODT | 2 | — |
| 2024 | — | — | — | — | Complete |
Questions to ask
Questions you could discuss with your doctor
- What role, if any, does Eliquis play in your treatment recommendations for me?
- How do you evaluate evidence when you have a financial relationship with PFIZER INC.?
- Are there reasonable alternatives I should understand when we discuss treatment options?
- How should I interpret the industry-payment records shown here in the context of my care?
These are general questions generated from reviewed templates. They are not personalized medical advice.
Sources and limitations
How to read this page
- Payment and Medicare prescribing data can cover different years; every comparison shows both years explicitly.
- Part D does not represent a doctor’s entire practice; it excludes many patients and is subject to CMS public-release thresholds.
- Company–drug relationships must have an auditable source, a precise relationship type, and a valid evidence period. Unresolved mappings are not published.
- Generic drug claims are not attributed to a specific manufacturer without manufacturer-level evidence.
- When a source extract is incomplete, missing rows are never treated as proof of no payments or no prescriptions.
Loaded source releases
| Dataset | Year | Publication | Source |
|---|---|---|---|
| CMS Open Payments — General Payments | 2025 | 2026-06-30 | Original source |
| Medicare Part D Prescribers by Provider and Drug | 2024 | 2026-05-06 | Original source |
| NPPES Data Dissemination V2 | current / reference data | 2026-08-10 | Original source |
Full methodology · Questions & answers · Report a possible error