Payment overview · 2025
General Payments
$679.42
22 reported records · 10 companies
Healthcare provider profile · identity verified
William Douglas Knopf, MD
Allopathic & Osteopathic Physicians|Internal Medicine|Cardiovascular Disease · MACON, GA · NPI 1922007541
Verified facts
What the public records show
CMS Open Payments records show William Douglas Knopf, MD received $679.42 in general payments during 2025 across 22 reported records.
ZOLL Services LLC (A/K/A ZOLL LifeCor Corp) accounted for 24.7% of that reported general-payment amount.
The Open Payments records used for this analysis explicitly named 11 associated products.
A separate comparison found the same explicitly named product in public Medicare Part D data: Eliquis, Wegovy.
E.R. Squibb & Sons, L.L.C. 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 27956 records involving 14870 distinct recipient NPIs. Public Medicare Part D data also shows 1190 claims for Eliquis by this doctor in 2024.
Novartis Pharmaceuticals Corporation reported payments to this doctor in 2025. Across the 2025 Open Payments General Payment records loaded for this analysis, that same reporting entity reported ENTRESTO as an associated drug or biological on 9346 records involving 6254 distinct recipient NPIs. Public Medicare Part D data also shows 584 claims for Entresto by this doctor in 2024.
Novo Nordisk 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 Wegovy as an associated drug or biological on 183056 records involving 75256 distinct recipient NPIs. Public Medicare Part D data also shows 13 claims for Wegovy 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 1190 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 |
|---|---|---|---|---|---|
| ZOLL Services LLC (A/K/A ZOLL LifeCor Corp) | Unresolved — no canonical attribution shown | $167.56 | 24.7% | 7 | 2025 |
| Shockwave Medical, Inc | Unresolved — no canonical attribution shown | $149.81 | 22.1% | 1 | 2025 |
| Inspire Medical Systems, Inc. | Unresolved — no canonical attribution shown | $111.44 | 16.4% | 2 | 2025 |
| Kestra Medical Technology Services, Inc. | Unresolved — no canonical attribution shown | $56.40 | 8.3% | 2 | 2025 |
| Novartis Pharmaceuticals Corporation | Unresolved — no canonical attribution shown | $53.19 | 7.8% | 3 | 2025 |
| PFIZER INC. | Unresolved — no canonical attribution shown | $43.17 | 6.3% | 2 | 2025 |
| E.R. Squibb & Sons, L.L.C. | Unresolved — no canonical attribution shown | $37.06 | 5.5% | 2 | 2025 |
| Novo Nordisk Inc | Unresolved — no canonical attribution shown | $23.49 | 3.5% | 1 | 2025 |
| Medtronic, Inc. |
Medtronic, Inc. exact · evidence 2025-07-22 |
$19.70 | 2.9% | 1 | 2025 |
| Boston Scientific Corporation | Unresolved — no canonical attribution shown | $17.60 | 2.6% | 1 | 2025 |
What were the payments for?
Payment categories
| Category | Amount | Records |
|---|---|---|
| Food and Beverage | $679.42 | 22 |
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 |
|---|---|---|---|---|---|
| LifeVest Normalized: lifevest |
Device | ZOLL Services LLC (A/K/A ZOLL LifeCor Corp) | $167.56 | 7 | 2025 |
Source payment records
|
|||||
| Shockwave IVL System with the Shockwave C2 Coronary IVL Catheter Normalized: shockwave ivl system with the shockwave c2 coronary ivl catheter |
Device | Shockwave Medical, Inc | $149.81 | 1 | 2025 |
Source payment records
|
|||||
| INSPIRE Normalized: inspire |
Device | Inspire Medical Systems, Inc. | $111.44 | 2 | 2025 |
Source payment records
|
|||||
| Assure WCD Normalized: assure wcd |
Device | Kestra Medical Technology Services, Inc. | $56.40 | 2 | 2025 |
Source payment records
|
|||||
| LEQVIO Normalized: leqvio |
Drug | Novartis Pharmaceuticals Corporation | $53.19 | 3 | 2025 |
Source payment records
|
|||||
| ELIQUIS Normalized: eliquis |
Drug | E.R. Squibb & Sons, L.L.C., PFIZER INC. | $42.15 | 2 | 2025 |
Source payment records
|
|||||
| Wegovy Normalized: wegovy |
Drug | Novo Nordisk Inc | $23.49 | 1 | 2025 |
Source payment records
|
|||||
| VYNDAQEL Normalized: vyndaqel |
Drug | PFIZER INC. | $20.78 | 1 | 2025 |
Source payment records
|
|||||
| VENASEAL Normalized: venaseal |
Device | Medtronic, Inc. | $19.70 | 1 | 2025 |
Source payment records
|
|||||
| LUX-Dx Insertable Cardiac Monitor Normalized: lux dx insertable cardiac monitor |
Device | Boston Scientific Corporation | $17.60 | 1 | 2025 |
Source payment records
|
|||||
| CAMZYOS Normalized: camzyos |
Drug | E.R. Squibb & Sons, L.L.C. | $17.30 | 1 | 2025 |
Source payment records
|
|||||
* 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 | 1190 | exact normalized | Medicare Part D |
| Wegovy wegovy |
2025 | Wegovy | 2024 | 13 Beneficiary count suppressed |
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 |
|---|---|---|---|---|---|---|
| E.R. Squibb & Sons, L.L.C. Exact reporting entity; no affiliate inference |
2025 | ELIQUIS open payments reported associated product |
CMS Open Payments — General Payments 27956 supporting records · 14870 recipient NPIs · example record 1184377713 |
Eliquis · 2024 Exact normalized brand match · 1 Part D row |
1190 | 246 |
| Novartis Pharmaceuticals Corporation Exact reporting entity; no affiliate inference |
2025 | ENTRESTO open payments reported associated product |
CMS Open Payments — General Payments 9346 supporting records · 6254 recipient NPIs · example record 1200004797 |
Entresto · 2024 Exact normalized brand match · 1 Part D row |
584 | 134 |
| Novo Nordisk Inc Exact reporting entity; no affiliate inference |
2025 | Wegovy open payments reported associated product |
CMS Open Payments — General Payments 183056 supporting records · 75256 recipient NPIs · example record 1188130070 |
Wegovy · 2024 Exact normalized brand match · 1 Part D row |
13 | suppressed by CMS |
| 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 |
1190 | 246 |
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 |
|---|---|---|---|
| Eliquis | Apixaban | 1190 | 246 |
| Metoprolol Succinate | Metoprolol Succinate | 1026 | 276 |
| Atorvastatin Calcium | Atorvastatin Calcium | 906 | 241 |
| Metoprolol Tartrate | Metoprolol Tartrate | 703 | 213 |
| Furosemide | Furosemide | 650 | 187 |
| Clopidogrel | Clopidogrel Bisulfate | 648 | 174 |
| Entresto | Sacubitril/Valsartan | 584 | 134 |
| Carvedilol | Carvedilol | 514 | 146 |
| Losartan Potassium | Losartan Potassium | 460 | 126 |
| Losartan-Hydrochlorothiazide | Losartan/Hydrochlorothiazide | 374 | 98 |
| Rosuvastatin Calcium | Rosuvastatin Calcium | 358 | 112 |
| Valsartan-Hydrochlorothiazide | Valsartan/Hydrochlorothiazide | 335 | 81 |
| Nifedipine Er | Nifedipine | 313 | 67 |
| Sotalol | Sotalol Hcl | 309 | 76 |
| Amlodipine Besylate | Amlodipine Besylate | 299 | 87 |
| Brilinta | Ticagrelor | 278 | 79 |
| Potassium Chloride | Potassium Chloride | 252 | 63 |
| Flecainide Acetate | Flecainide Acetate | 248 | 61 |
| Clonidine Hcl | Clonidine Hcl | 233 | 71 |
| Isosorbide Mononitrate Er | Isosorbide Mononitrate | 229 | 53 |
| Lisinopril | Lisinopril | 207 | 57 |
| Repatha Sureclick | Evolocumab | 197 | 31 |
| Hydrochlorothiazide | Hydrochlorothiazide | 186 | 54 |
| Xarelto | Rivaroxaban | 168 | 38 |
| Pantoprazole Sodium | Pantoprazole Sodium | 162 | 36 |
| Atenolol | Atenolol | 152 | 46 |
| Valsartan | Valsartan | 137 | 37 |
| Digoxin | Digoxin | 122 | 29 |
| Amiodarone Hcl | Amiodarone Hcl | 105 | 37 |
| Ezetimibe | Ezetimibe | 95 | 29 |
| Nitroglycerin | Nitroglycerin | 83 | 39 |
| Farxiga | Dapagliflozin Propanediol | 78 | 20 |
| Midodrine Hcl | Midodrine Hcl | 71 | 24 |
| Spironolactone | Spironolactone | 71 | 26 |
| Ranolazine Er | Ranolazine | 67 | 18 |
| Warfarin Sodium | Warfarin Sodium | 67 | 13 |
| Pravastatin Sodium | Pravastatin Sodium | 53 | 14 |
| Telmisartan | Telmisartan | 49 | 12 |
| Prasugrel Hcl | Prasugrel Hcl | 45 | 24 |
| Fludrocortisone Acetate | Fludrocortisone Acetate | 44 | 13 |
| Benazepril Hcl | Benazepril Hcl | 43 | suppressed |
| Hydralazine Hcl | Hydralazine Hcl | 38 | 11 |
| Simvastatin | Simvastatin | 38 | suppressed |
| Mounjaro | Tirzepatide | 31 | suppressed |
| Diltiazem 24hr Er (Cd) | Diltiazem Hcl | 28 | 12 |
| Sildenafil Citrate | Sildenafil Citrate | 28 | suppressed |
| Bumetanide | Bumetanide | 27 | suppressed |
| Klor-Con M20 | Potassium Chloride | 26 | 13 |
| Zolpidem Tartrate | Zolpidem Tartrate | 24 | suppressed |
| Metolazone | Metolazone | 23 | 15 |
| Propranolol Hcl | Propranolol Hcl | 23 | suppressed |
| Bupropion Xl | Bupropion Hcl | 21 | suppressed |
| Lisinopril-Hydrochlorothiazide | Lisinopril/Hydrochlorothiazide | 20 | suppressed |
| Omeprazole | Omeprazole | 19 | suppressed |
| Minoxidil | Minoxidil | 18 | suppressed |
| Verapamil Er | Verapamil Hcl | 18 | suppressed |
| Diltiazem Hcl | Diltiazem Hcl | 17 | suppressed |
| Pindolol | Pindolol | 17 | suppressed |
| Albuterol Sulfate Hfa | Albuterol Sulfate | 16 | suppressed |
| Allopurinol | Allopurinol | 16 | suppressed |
| Repatha Syringe | Evolocumab | 16 | suppressed |
| Gabapentin | Gabapentin | 15 | suppressed |
| Triamterene-Hydrochlorothiazid | Triamterene/Hydrochlorothiazid | 15 | suppressed |
| Enoxaparin Sodium | Enoxaparin Sodium | 14 | suppressed |
| Nitroglycerin Patch | Nitroglycerin | 14 | suppressed |
| Sotalol Af | Sotalol Hcl | 14 | suppressed |
| Amlodipine Besylate-Benazepril | Amlodipine Besylate/Benazepril | 13 | suppressed |
| Irbesartan-Hydrochlorothiazide | Irbesartan/Hydrochlorothiazide | 13 | suppressed |
| Isosorbide Dinitrate | Isosorbide Dinitrate | 13 | suppressed |
| Propranolol Hcl Er | Propranolol Hcl | 13 | suppressed |
| Ramipril | Ramipril | 13 | suppressed |
| Wegovy | Semaglutide | 13 | suppressed |
| Fenofibrate | Fenofibrate | 12 | suppressed |
| Glimepiride | Glimepiride | 12 | suppressed |
| Labetalol Hcl | Labetalol Hcl | 12 | suppressed |
| Praluent Pen | Alirocumab | 12 | suppressed |
| Acebutolol Hcl | Acebutolol Hcl | 11 | suppressed |
| Chlorthalidone | Chlorthalidone | 11 | suppressed |
| Cilostazol | Cilostazol | 11 | suppressed |
| Famotidine | Famotidine | 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 | $679.42 · 22 records | ZOLL Services LLC (A/K/A ZOLL LifeCor Corp) | Assure WCD, CAMZYOS, ELIQUIS, INSPIRE, LEQVIO, LUX-Dx Insertable Cardiac Monitor, LifeVest, Shockwave IVL System with the Shockwave C2 Coronary IVL Catheter, VENASEAL, VYNDAQEL, Wegovy | 4 | — |
| 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 E.R. Squibb & Sons, L.L.C.?
- 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