Payment overview · 2025
General Payments
We did not find matching Open Payments records for this doctor in the selected program year.
Healthcare provider profile · identity verified
Daniel J Grzegorek, D.O.
Internal Medicine · WILLOWBROOK, IL · NPI 1487651337
Verified facts
What the public records show
We did not find matching Open Payments records for this doctor in 2025.
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.
Analysis 1 · Payment-linked products
Products named in Open Payments records
No payment-linked product analysis is available because no matching General Payment records were found for the selected year.
Public prescribing for products named in payments
There is no explicit payment-product set available for a Part D comparison.
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.
There is no payer-company set available for this comparison.
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 | 786 | 203 |
| Levothyroxine Sodium | Levothyroxine Sodium | 607 | 169 |
| Amlodipine Besylate | Amlodipine Besylate | 476 | 113 |
| Lisinopril | Lisinopril | 388 | 90 |
| Losartan Potassium | Losartan Potassium | 340 | 92 |
| Simvastatin | Simvastatin | 334 | 97 |
| Gabapentin | Gabapentin | 316 | 86 |
| Metformin Hcl | Metformin Hcl | 310 | 87 |
| Metoprolol Succinate | Metoprolol Succinate | 309 | 94 |
| Eliquis | Apixaban | 257 | 44 |
| Rosuvastatin Calcium | Rosuvastatin Calcium | 217 | 64 |
| Pantoprazole Sodium | Pantoprazole Sodium | 214 | 54 |
| Tamsulosin Hcl | Tamsulosin Hcl | 199 | 61 |
| Carvedilol | Carvedilol | 195 | 48 |
| Omeprazole | Omeprazole | 173 | 47 |
| Metoprolol Tartrate | Metoprolol Tartrate | 169 | 45 |
| Furosemide | Furosemide | 164 | 51 |
| Hydrochlorothiazide | Hydrochlorothiazide | 146 | 45 |
| Memantine Hcl | Memantine Hcl | 139 | 24 |
| Trazodone Hcl | Trazodone Hcl | 139 | 33 |
| Clopidogrel | Clopidogrel Bisulfate | 136 | 35 |
| Potassium Chloride | Potassium Chloride | 133 | 39 |
| Donepezil Hcl | Donepezil Hcl | 130 | 25 |
| Allopurinol | Allopurinol | 126 | 42 |
| Alendronate Sodium | Alendronate Sodium | 113 | 28 |
| Escitalopram Oxalate | Escitalopram Oxalate | 111 | 30 |
| Glimepiride | Glimepiride | 110 | 34 |
| Pravastatin Sodium | Pravastatin Sodium | 103 | 28 |
| Hydrocodone-Acetaminophen | Hydrocodone/Acetaminophen | 97 | 30 |
| Lisinopril-Hydrochlorothiazide | Lisinopril/Hydrochlorothiazide | 97 | 27 |
| Duloxetine Hcl | Duloxetine Hcl | 96 | 26 |
| Montelukast Sodium | Montelukast Sodium | 92 | 21 |
| Sertraline Hcl | Sertraline Hcl | 92 | 35 |
| Citalopram Hbr | Citalopram Hydrobromide | 88 | 24 |
| Torsemide | Torsemide | 87 | 32 |
| Zolpidem Tartrate | Zolpidem Tartrate | 82 | suppressed |
| Mirtazapine | Mirtazapine | 79 | 29 |
| Venlafaxine Hcl Er | Venlafaxine Hcl | 78 | 15 |
| Finasteride | Finasteride | 76 | 20 |
| Clonazepam | Clonazepam | 74 | 20 |
| Ezetimibe | Ezetimibe | 64 | 22 |
| Spironolactone | Spironolactone | 61 | 19 |
| Atenolol | Atenolol | 58 | 15 |
| Warfarin Sodium | Warfarin Sodium | 55 | 14 |
| Famotidine | Famotidine | 53 | 15 |
| Albuterol Sulfate Hfa | Albuterol Sulfate | 51 | 30 |
| Meloxicam | Meloxicam | 51 | 18 |
| Jardiance | Empagliflozin | 50 | suppressed |
| Prednisone | Prednisone | 50 | 20 |
| Triamterene-Hydrochlorothiazid | Triamterene/Hydrochlorothiazid | 50 | 22 |
| Bisoprolol-Hydrochlorothiazide | Bisoprolol/Hydrochlorothiazide | 49 | 16 |
| Hydralazine Hcl | Hydralazine Hcl | 49 | 19 |
| Alprazolam | Alprazolam | 47 | 13 |
| Fluticasone Propionate | Fluticasone Propionate | 47 | 20 |
| Levetiracetam | Levetiracetam | 43 | suppressed |
| Metformin Hcl Er | Metformin Hcl | 42 | 14 |
| Losartan-Hydrochlorothiazide | Losartan/Hydrochlorothiazide | 41 | 12 |
| Pioglitazone Hcl | Pioglitazone Hcl | 41 | 16 |
| Xarelto | Rivaroxaban | 41 | suppressed |
| Methylprednisolone | Methylprednisolone | 40 | 35 |
| Olmesartan Medoxomil | Olmesartan Medoxomil | 40 | 11 |
| Synthroid | Levothyroxine Sodium | 40 | 13 |
| Tramadol Hcl | Tramadol Hcl | 37 | 17 |
| Lantus Solostar | Insulin Glargine,hum.Rec.Anlog | 36 | suppressed |
| Quetiapine Fumarate | Quetiapine Fumarate | 36 | 12 |
| Amiodarone Hcl | Amiodarone Hcl | 34 | suppressed |
| Januvia | Sitagliptin Phosphate | 33 | suppressed |
| Memantine Hcl Er | Memantine Hcl | 33 | suppressed |
| Sucralfate | Sucralfate | 33 | suppressed |
| Vancomycin Hcl | Vancomycin Hcl | 33 | 11 |
| Pregabalin | Pregabalin | 32 | 12 |
| Tradjenta | Linagliptin | 31 | suppressed |
| Baclofen | Baclofen | 30 | 11 |
| Aripiprazole | Aripiprazole | 28 | suppressed |
| Hydrocortisone | Hydrocortisone | 28 | suppressed |
| Nifedipine Er | Nifedipine | 28 | suppressed |
| Novolog Flexpen | Insulin Aspart | 28 | suppressed |
| Cefadroxil | Cefadroxil | 27 | 26 |
| Diltiazem 24hr Er (Cd) | Diltiazem Hcl | 27 | 13 |
| Irbesartan | Irbesartan | 27 | 12 |
| Meclizine Hcl | Meclizine Hcl | 27 | 14 |
| Pramipexole Dihydrochloride | Pramipexole Di-Hcl | 27 | suppressed |
| Bupropion Hcl Sr | Bupropion Hcl | 26 | suppressed |
| Fluticasone-Salmeterol | Fluticasone Propion/Salmeterol | 26 | suppressed |
| Alfuzosin Hcl Er | Alfuzosin Hcl | 25 | suppressed |
| Lorazepam | Lorazepam | 25 | suppressed |
| Nitrofurantoin Mono-Macro | Nitrofurantoin Monohyd/M-Cryst | 25 | 20 |
| Solifenacin Succinate | Solifenacin Succinate | 25 | suppressed |
| Cefepime Hcl | Cefepime Hcl | 24 | suppressed |
| Celecoxib | Celecoxib | 24 | suppressed |
| Divalproex Sodium | Divalproex Sodium | 24 | suppressed |
| Oxybutynin Chloride Er | Oxybutynin Chloride | 24 | suppressed |
| Valsartan | Valsartan | 24 | suppressed |
| Bisoprolol Fumarate | Bisoprolol Fumarate | 23 | suppressed |
| Cholestyramine | Cholestyramine (With Sugar) | 23 | suppressed |
| Tizanidine Hcl | Tizanidine Hcl | 23 | 17 |
| Valsartan-Hydrochlorothiazide | Valsartan/Hydrochlorothiazide | 23 | suppressed |
| Bupropion Xl | Bupropion Hcl | 22 | suppressed |
| Paxlovid | Nirmatrelvir/Ritonavir | 22 | 19 |
| Trelegy Ellipta | Fluticasone/Umeclidin/Vilanter | 22 | suppressed |
| Clotrimazole-Betamethasone | Clotrimazole/Betamethasone Dip | 21 | 15 |
| Azithromycin | Azithromycin | 20 | 19 |
| Levofloxacin | Levofloxacin | 20 | suppressed |
| Colestipol Hcl | Colestipol Hcl | 19 | suppressed |
| Diltiazem Hcl | Diltiazem Hcl | 19 | suppressed |
| Latanoprost | Latanoprost | 19 | suppressed |
| Tolterodine Tartrate Er | Tolterodine Tartrate | 19 | suppressed |
| Amlodipine Besylate-Benazepril | Amlodipine Besylate/Benazepril | 18 | suppressed |
| Amoxicillin-Clavulanate Potass | Amoxicillin/Potassium Clav | 18 | 15 |
| Indapamide | Indapamide | 18 | suppressed |
| Propranolol Hcl Er | Propranolol Hcl | 18 | suppressed |
| Risperidone | Risperidone | 18 | suppressed |
| Enalapril Maleate | Enalapril Maleate | 17 | suppressed |
| Fenofibrate | Fenofibrate Nanocrystallized | 17 | suppressed |
| Ropinirole Hcl | Ropinirole Hcl | 17 | suppressed |
| Amitriptyline Hcl | Amitriptyline Hcl | 16 | suppressed |
| Anoro Ellipta | Umeclidinium Brm/Vilanterol Tr | 16 | suppressed |
| Calcipotriene | Calcipotriene | 16 | suppressed |
| Glycopyrrolate | Glycopyrrolate | 15 | suppressed |
| Lansoprazole | Lansoprazole | 15 | suppressed |
| Chlorthalidone | Chlorthalidone | 14 | suppressed |
| Cyclobenzaprine Hcl | Cyclobenzaprine Hcl | 14 | 11 |
| Esomeprazole Magnesium | Esomeprazole Magnesium | 14 | suppressed |
| Methenamine Hippurate | Methenamine Hippurate | 14 | suppressed |
| Midodrine Hcl | Midodrine Hcl | 14 | suppressed |
| Diphenoxylate-Atropine | Diphenoxylate Hcl/Atropine | 13 | suppressed |
| Jantoven | Warfarin Sodium | 13 | suppressed |
| Paroxetine Hcl | Paroxetine Hcl | 13 | suppressed |
| Propranolol Hcl | Propranolol Hcl | 13 | suppressed |
| Tacrolimus | Tacrolimus | 13 | suppressed |
| Ciprofloxacin Hcl | Ciprofloxacin Hcl | 12 | suppressed |
| Clonidine Hcl | Clonidine Hcl | 12 | suppressed |
| Diclofenac Sodium | Diclofenac Sodium | 12 | suppressed |
| Enoxaparin Sodium | Enoxaparin Sodium | 12 | suppressed |
| Fenofibrate | Fenofibrate | 12 | suppressed |
| Humalog Kwikpen U-100 | Insulin Lispro | 12 | suppressed |
| Isosorbide Dinitrate | Isosorbide Dinitrate | 12 | suppressed |
| Lamotrigine | Lamotrigine | 12 | suppressed |
| Multaq | Dronedarone Hcl | 12 | suppressed |
| Nystatin | Nystatin | 12 | suppressed |
| Ramipril | Ramipril | 12 | suppressed |
| Sevelamer Carbonate | Sevelamer Carbonate | 12 | suppressed |
| Symbicort | Budesonide/Formoterol Fumarate | 12 | suppressed |
| Valproic Acid | Valproic Acid | 12 | suppressed |
| Varenicline Tartrate | Varenicline Tartrate | 12 | suppressed |
| Atazanavir Sulfate | Atazanavir Sulfate | 11 | suppressed |
| Azelastine Hcl | Azelastine Hcl | 11 | suppressed |
| Bicalutamide | Bicalutamide | 11 | suppressed |
| Myrbetriq | Mirabegron | 11 | suppressed |
| Permethrin | Permethrin | 11 | suppressed |
| Trospium Chloride | Trospium Chloride | 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 | — | — | — | — | — |
| 2024 | — | — | — | — | Complete |
Questions to ask
Questions you could discuss with your doctor
- 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