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
Gregory John Mcnamara, M.D.
Family Practice · LITTLE FALLS, MN · NPI 1407871411
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 | 713 | 181 |
| Levothyroxine Sodium | Levothyroxine Sodium | 426 | 88 |
| Lisinopril | Lisinopril | 386 | 107 |
| Amlodipine Besylate | Amlodipine Besylate | 373 | 89 |
| Omeprazole | Omeprazole | 349 | 89 |
| Metoprolol Succinate | Metoprolol Succinate | 335 | 81 |
| Gabapentin | Gabapentin | 302 | 71 |
| Losartan Potassium | Losartan Potassium | 300 | 72 |
| Tamsulosin Hcl | Tamsulosin Hcl | 192 | 51 |
| Tramadol Hcl | Tramadol Hcl | 174 | 44 |
| Simvastatin | Simvastatin | 172 | 49 |
| Metformin Hcl Er | Metformin Hcl | 157 | 43 |
| Furosemide | Furosemide | 156 | 33 |
| Hydrocodone-Acetaminophen | Hydrocodone/Acetaminophen | 154 | 30 |
| Duloxetine Hcl | Duloxetine Hcl | 152 | 31 |
| Sertraline Hcl | Sertraline Hcl | 150 | 34 |
| Citalopram Hbr | Citalopram Hydrobromide | 146 | 38 |
| Metoprolol Tartrate | Metoprolol Tartrate | 142 | 34 |
| Trazodone Hcl | Trazodone Hcl | 140 | 31 |
| Pantoprazole Sodium | Pantoprazole Sodium | 133 | 36 |
| Hydrochlorothiazide | Hydrochlorothiazide | 132 | 34 |
| Potassium Chloride | Potassium Chloride | 128 | 40 |
| Rosuvastatin Calcium | Rosuvastatin Calcium | 126 | 35 |
| Triamterene-Hydrochlorothiazid | Triamterene/Hydrochlorothiazid | 126 | 33 |
| Lorazepam | Lorazepam | 120 | 24 |
| Lisinopril-Hydrochlorothiazide | Lisinopril/Hydrochlorothiazide | 115 | 26 |
| Metformin Hcl | Metformin Hcl | 107 | 30 |
| Pravastatin Sodium | Pravastatin Sodium | 105 | 24 |
| Tizanidine Hcl | Tizanidine Hcl | 105 | 15 |
| Clonazepam | Clonazepam | 100 | 19 |
| Prednisone | Prednisone | 100 | 53 |
| Montelukast Sodium | Montelukast Sodium | 94 | 21 |
| Famotidine | Famotidine | 92 | 20 |
| Atenolol | Atenolol | 87 | 20 |
| Xarelto | Rivaroxaban | 86 | 21 |
| Albuterol Sulfate Hfa | Albuterol Sulfate | 85 | 29 |
| Alendronate Sodium | Alendronate Sodium | 85 | 26 |
| Clopidogrel | Clopidogrel Bisulfate | 85 | 18 |
| Mirtazapine | Mirtazapine | 85 | 18 |
| Warfarin Sodium | Warfarin Sodium | 85 | 19 |
| Bupropion Xl | Bupropion Hcl | 81 | 20 |
| Hydroxyzine Hcl | Hydroxyzine Hcl | 77 | 16 |
| Zolpidem Tartrate | Zolpidem Tartrate | 74 | 19 |
| Fluoxetine Hcl | Fluoxetine Hcl | 73 | 22 |
| Fluticasone Propionate | Fluticasone Propionate | 73 | 25 |
| Allopurinol | Allopurinol | 71 | 18 |
| Terazosin Hcl | Terazosin Hcl | 65 | 15 |
| Amoxicillin | Amoxicillin | 62 | 44 |
| Ozempic | Semaglutide | 62 | 15 |
| Baclofen | Baclofen | 58 | suppressed |
| Lantus Solostar | Insulin Glargine,hum.Rec.Anlog | 58 | 16 |
| Spironolactone | Spironolactone | 58 | 15 |
| Chlorthalidone | Chlorthalidone | 57 | 19 |
| Quetiapine Fumarate | Quetiapine Fumarate | 57 | suppressed |
| Triamcinolone Acetonide | Triamcinolone Acetonide | 55 | 21 |
| Buspirone Hcl | Buspirone Hcl | 54 | 11 |
| Oxybutynin Chloride Er | Oxybutynin Chloride | 54 | 12 |
| Meloxicam | Meloxicam | 52 | 18 |
| Cyclobenzaprine Hcl | Cyclobenzaprine Hcl | 50 | 12 |
| Eliquis | Apixaban | 50 | 14 |
| Escitalopram Oxalate | Escitalopram Oxalate | 50 | 13 |
| Oxycodone Hcl | Oxycodone Hcl | 48 | suppressed |
| Valsartan | Valsartan | 47 | 11 |
| Cephalexin | Cephalexin | 46 | 23 |
| Clonidine Hcl | Clonidine Hcl | 46 | 15 |
| Pramipexole Dihydrochloride | Pramipexole Di-Hcl | 46 | 16 |
| Diltiazem 24hr Er (Cd) | Diltiazem Hcl | 43 | 13 |
| Ventolin Hfa | Albuterol Sulfate | 43 | 12 |
| Azelastine Hcl | Azelastine Hcl | 42 | 20 |
| Topiramate | Topiramate | 42 | suppressed |
| Azithromycin | Azithromycin | 41 | 28 |
| Venlafaxine Hcl Er | Venlafaxine Hcl | 41 | suppressed |
| Oxybutynin Chloride | Oxybutynin Chloride | 39 | suppressed |
| Bupropion Hcl Sr | Bupropion Hcl | 38 | suppressed |
| Fluticasone-Salmeterol | Fluticasone Propion/Salmeterol | 38 | 12 |
| Donepezil Hcl | Donepezil Hcl | 37 | suppressed |
| Januvia | Sitagliptin Phosphate | 37 | suppressed |
| Torsemide | Torsemide | 35 | suppressed |
| Carvedilol | Carvedilol | 34 | 13 |
| Ezetimibe | Ezetimibe | 34 | suppressed |
| Finasteride | Finasteride | 34 | suppressed |
| Linzess | Linaclotide | 34 | suppressed |
| Doxycycline Hyclate | Doxycycline Hyclate | 33 | 18 |
| Pioglitazone Hcl | Pioglitazone Hcl | 33 | 11 |
| Pregabalin | Pregabalin | 33 | suppressed |
| Farxiga | Dapagliflozin Propanediol | 32 | suppressed |
| Glimepiride | Glimepiride | 32 | suppressed |
| Ondansetron Hcl | Ondansetron Hcl | 30 | suppressed |
| Incruse Ellipta | Umeclidinium Bromide | 29 | suppressed |
| Alprazolam | Alprazolam | 28 | suppressed |
| Fluticasone Propionate Hfa | Fluticasone Propionate | 28 | suppressed |
| Losartan-Hydrochlorothiazide | Losartan/Hydrochlorothiazide | 28 | suppressed |
| Klor-Con M20 | Potassium Chloride | 27 | suppressed |
| Meclizine Hcl | Meclizine Hcl | 27 | suppressed |
| Acetaminophen-Codeine | Acetaminophen With Codeine | 26 | suppressed |
| Risperidone | Risperidone | 26 | suppressed |
| Synthroid | Levothyroxine Sodium | 26 | suppressed |
| Gemfibrozil | Gemfibrozil | 25 | suppressed |
| Memantine Hcl | Memantine Hcl | 25 | suppressed |
| Rivastigmine | Rivastigmine Tartrate | 25 | suppressed |
| Dicyclomine Hcl | Dicyclomine Hcl | 24 | suppressed |
| Ibuprofen | Ibuprofen | 24 | suppressed |
| Prochlorperazine Maleate | Prochlorperazine Maleate | 24 | suppressed |
| Toujeo Solostar | Insulin Glargine,hum.Rec.Anlog | 24 | suppressed |
| Myrbetriq | Mirabegron | 23 | suppressed |
| Ropinirole Hcl | Ropinirole Hcl | 22 | suppressed |
| Novolog Flexpen | Insulin Aspart | 20 | suppressed |
| Rizatriptan | Rizatriptan Benzoate | 20 | suppressed |
| Glipizide Er | Glipizide | 19 | suppressed |
| Temazepam | Temazepam | 19 | suppressed |
| Labetalol Hcl | Labetalol Hcl | 18 | suppressed |
| Paroxetine Hcl | Paroxetine Hcl | 18 | suppressed |
| Advair Hfa | Fluticasone Propion/Salmeterol | 17 | suppressed |
| Amlodipine Besylate-Benazepril | Amlodipine Besylate/Benazepril | 17 | suppressed |
| Estradiol | Estradiol | 17 | suppressed |
| Naratriptan Hcl | Naratriptan Hcl | 17 | suppressed |
| Propranolol Hcl Er | Propranolol Hcl | 17 | suppressed |
| Amoxicillin-Clavulanate Potass | Amoxicillin/Potassium Clav | 15 | 11 |
| Celecoxib | Celecoxib | 15 | suppressed |
| Fluconazole | Fluconazole | 15 | 12 |
| Hydrocortisone | Hydrocortisone | 15 | suppressed |
| Sucralfate | Sucralfate | 15 | suppressed |
| Amitriptyline Hcl | Amitriptyline Hcl | 14 | suppressed |
| Breyna | Budesonide/Formoterol Fumarate | 14 | suppressed |
| Irbesartan | Irbesartan | 14 | suppressed |
| Minocycline Hcl | Minocycline Hcl | 14 | suppressed |
| Phenytoin Sodium Extended | Phenytoin Sodium Extended | 14 | suppressed |
| Sumatriptan Succinate | Sumatriptan Succinate | 14 | suppressed |
| Ulticare Pen Needle | Pen Needle, Diabetic | 14 | suppressed |
| Cholestyramine | Cholestyramine (With Sugar) | 13 | suppressed |
| Diazepam | Diazepam | 13 | suppressed |
| Lansoprazole | Lansoprazole | 13 | suppressed |
| Levocetirizine Dihydrochloride | Levocetirizine Dihydrochloride | 13 | suppressed |
| Propranolol Hcl | Propranolol Hcl | 13 | suppressed |
| Saxagliptin Hcl | Saxagliptin Hcl | 13 | suppressed |
| Aripiprazole | Aripiprazole | 12 | suppressed |
| Diclofenac Sodium | Diclofenac Sodium | 12 | suppressed |
| Flecainide Acetate | Flecainide Acetate | 12 | suppressed |
| Hydroxyzine Pamoate | Hydroxyzine Pamoate | 12 | suppressed |
| Levetiracetam | Levetiracetam | 12 | suppressed |
| Loperamide | Loperamide Hcl | 12 | suppressed |
| Methotrexate | Methotrexate Sodium | 12 | suppressed |
| Cefuroxime | Cefuroxime Axetil | 11 | 11 |
| Imipramine Hcl | Imipramine Hcl | 11 | suppressed |
| Latanoprost | Latanoprost | 11 | suppressed |
| Levofloxacin | Levofloxacin | 11 | suppressed |
| Mupirocin | Mupirocin | 11 | suppressed |
| Nano 2nd Gen Pen Needle | Pen Needle, Diabetic | 11 | suppressed |
| Naproxen | Naproxen | 11 | suppressed |
| Ultra-Fine Short Pen Needle | Pen Needle, Diabetic | 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