Payment overview · 2025
General Payments
$24.36
1 reported records · 1 companies
Healthcare provider profile · identity verified
Marc E Zook, MD
Allopathic & Osteopathic Physicians|Family Medicine · ROUND ROCK, TX · NPI 1497761753
Verified facts
What the public records show
CMS Open Payments records show Marc E Zook, MD received $24.36 in general payments during 2025 across 1 reported records.
Novo Nordisk Inc accounted for 100.0% of that reported general-payment amount.
The Open Payments records used for this analysis explicitly named 2 associated products.
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 |
|---|---|---|---|---|---|
| Novo Nordisk Inc | Unresolved — no canonical attribution shown | $24.36 | 100.0% | 1 | 2025 |
What were the payments for?
Payment categories
| Category | Amount | Records |
|---|---|---|
| Food and Beverage | $24.36 | 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 |
|---|---|---|---|---|---|
| Ozempic Normalized: ozempic |
Drug | Novo Nordisk Inc | $24.36 | 1 | 2025 |
Source payment records
|
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| Rybelsus Normalized: rybelsus |
Drug | Novo Nordisk Inc | $24.36 | 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
No exact normalized or approved-alias overlap was found in the loaded Part D year. This does not mean the doctor never prescribed the product.
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.
No publishable same-company prescribing overlap was found in the loaded Part D year. This does not mean the doctor never prescribed a drug reported elsewhere by a paying company.
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 | 258 | 76 |
| Levothyroxine Sodium | Levothyroxine Sodium | 198 | 52 |
| Rosuvastatin Calcium | Rosuvastatin Calcium | 175 | 49 |
| Amlodipine Besylate | Amlodipine Besylate | 159 | 42 |
| Lisinopril | Lisinopril | 143 | 42 |
| Omeprazole | Omeprazole | 135 | 45 |
| Trazodone Hcl | Trazodone Hcl | 129 | 31 |
| Losartan Potassium | Losartan Potassium | 116 | 33 |
| Metformin Hcl Er | Metformin Hcl | 95 | 25 |
| Escitalopram Oxalate | Escitalopram Oxalate | 88 | 17 |
| Sertraline Hcl | Sertraline Hcl | 84 | 25 |
| Tamsulosin Hcl | Tamsulosin Hcl | 79 | 23 |
| Metoprolol Succinate | Metoprolol Succinate | 75 | 20 |
| Fluticasone Propionate | Fluticasone Propionate | 64 | 23 |
| Bupropion Xl | Bupropion Hcl | 60 | 19 |
| Meloxicam | Meloxicam | 56 | 24 |
| Pantoprazole Sodium | Pantoprazole Sodium | 51 | 15 |
| Gabapentin | Gabapentin | 49 | suppressed |
| Metformin Hcl | Metformin Hcl | 46 | 13 |
| Albuterol Sulfate Hfa | Albuterol Sulfate | 44 | 25 |
| Losartan-Hydrochlorothiazide | Losartan/Hydrochlorothiazide | 42 | 14 |
| Simvastatin | Simvastatin | 42 | 13 |
| Allopurinol | Allopurinol | 41 | 12 |
| Hydrochlorothiazide | Hydrochlorothiazide | 41 | suppressed |
| Zolpidem Tartrate | Zolpidem Tartrate | 41 | 13 |
| Buspirone Hcl | Buspirone Hcl | 39 | suppressed |
| Pravastatin Sodium | Pravastatin Sodium | 36 | suppressed |
| Azelastine Hcl | Azelastine Hcl | 35 | 27 |
| Paxlovid | Nirmatrelvir/Ritonavir | 35 | 35 |
| Amoxicillin-Clavulanate Potass | Amoxicillin/Potassium Clav | 34 | 33 |
| Methocarbamol | Methocarbamol | 32 | 19 |
| Alprazolam | Alprazolam | 31 | 12 |
| Fluoxetine Hcl | Fluoxetine Hcl | 31 | suppressed |
| Duloxetine Hcl | Duloxetine Hcl | 30 | suppressed |
| Montelukast Sodium | Montelukast Sodium | 29 | suppressed |
| Eszopiclone | Eszopiclone | 27 | suppressed |
| Metoprolol Tartrate | Metoprolol Tartrate | 27 | suppressed |
| Alfuzosin Hcl Er | Alfuzosin Hcl | 25 | suppressed |
| Ezetimibe | Ezetimibe | 25 | suppressed |
| Triamcinolone Acetonide | Triamcinolone Acetonide | 24 | 13 |
| Atenolol | Atenolol | 23 | suppressed |
| Colchicine | Colchicine | 22 | suppressed |
| Jardiance | Empagliflozin | 22 | suppressed |
| Pioglitazone Hcl | Pioglitazone Hcl | 22 | suppressed |
| Valacyclovir | Valacyclovir Hcl | 22 | 12 |
| Glipizide Er | Glipizide | 21 | suppressed |
| Methylprednisolone | Methylprednisolone | 21 | 21 |
| Potassium Chloride | Potassium Chloride | 21 | 11 |
| Ciprofloxacin Hcl | Ciprofloxacin Hcl | 20 | 20 |
| Tramadol Hcl | Tramadol Hcl | 20 | suppressed |
| Cyclobenzaprine Hcl | Cyclobenzaprine Hcl | 19 | suppressed |
| Dicyclomine Hcl | Dicyclomine Hcl | 19 | suppressed |
| Ezetimibe-Simvastatin | Ezetimibe/Simvastatin | 18 | suppressed |
| Famotidine | Famotidine | 18 | suppressed |
| Furosemide | Furosemide | 18 | suppressed |
| Valsartan-Hydrochlorothiazide | Valsartan/Hydrochlorothiazide | 18 | suppressed |
| Breo Ellipta | Fluticasone/Vilanterol | 16 | suppressed |
| Celecoxib | Celecoxib | 16 | suppressed |
| Ipratropium Bromide | Ipratropium Bromide | 16 | suppressed |
| Synthroid | Levothyroxine Sodium | 16 | suppressed |
| Fluticasone-Salmeterol | Fluticasone Propion/Salmeterol | 15 | suppressed |
| Mupirocin | Mupirocin | 15 | 13 |
| Azithromycin | Azithromycin | 14 | 14 |
| Cefdinir | Cefdinir | 14 | 14 |
| Sumatriptan Succinate | Sumatriptan Succinate | 14 | suppressed |
| Terazosin Hcl | Terazosin Hcl | 14 | suppressed |
| Carvedilol | Carvedilol | 13 | suppressed |
| Esomeprazole Magnesium | Esomeprazole Magnesium | 13 | suppressed |
| Pramipexole Dihydrochloride | Pramipexole Di-Hcl | 13 | suppressed |
| Ropinirole Hcl | Ropinirole Hcl | 13 | suppressed |
| Alendronate Sodium | Alendronate Sodium | 12 | suppressed |
| Cephalexin | Cephalexin | 12 | 12 |
| Fenofibrate | Fenofibrate | 12 | suppressed |
| Mounjaro | Tirzepatide | 12 | suppressed |
| Olmesartan Medoxomil | Olmesartan Medoxomil | 12 | suppressed |
| Triamterene-Hydrochlorothiazid | Triamterene/Hydrochlorothiazid | 12 | suppressed |
| Benazepril Hcl | Benazepril Hcl | 11 | suppressed |
| Fenofibrate | Fenofibrate Nanocrystallized | 11 | suppressed |
| Propranolol Hcl | Propranolol Hcl | 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 | $24.36 · 1 records | Novo Nordisk Inc | Ozempic, Rybelsus | — | — |
| 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