Payment overview · 2025
General Payments
$320.61
16 reported records · 10 companies
Healthcare provider profile · identity verified
Greg Howard Stampfli, M. D.
Allopathic & Osteopathic Physicians|Family Medicine · CHEYENNE, WY · NPI 1174637359
Verified facts
What the public records show
CMS Open Payments records show Greg Howard Stampfli, M. D. received $320.61 in general payments during 2025 across 16 reported records.
AstraZeneca Pharmaceuticals LP accounted for 22.4% of that reported general-payment amount.
The Open Payments records used for this analysis explicitly named 15 associated products.
A separate comparison found the same explicitly named product in public Medicare Part D data: Eliquis.
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 Ozempic as an associated drug or biological on 261625 records involving 77793 distinct recipient NPIs. Public Medicare Part D data also shows 43 claims for Ozempic 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 89 claims for Eliquis by this doctor in 2024.
SANOFI-AVENTIS U.S. LLC reported payments to this doctor in 2025. Across the 2025 Open Payments General Payment records loaded for this analysis, that same reporting entity reported LANTUS as an associated drug or biological on 12 records involving 11 distinct recipient NPIs. Public Medicare Part D data also shows 19 claims for Lantus 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 |
|---|---|---|---|---|---|
| AstraZeneca Pharmaceuticals LP | Unresolved — no canonical attribution shown | $71.68 | 22.4% | 4 | 2025 |
| Amgen Inc. | Unresolved — no canonical attribution shown | $54.15 | 16.9% | 3 | 2025 |
| Novo Nordisk Inc | Unresolved — no canonical attribution shown | $39.88 | 12.4% | 2 | 2025 |
| Boston Scientific Corporation | Unresolved — no canonical attribution shown | $33.78 | 10.5% | 1 | 2025 |
| Otsuka America Pharmaceutical, Inc. | Unresolved — no canonical attribution shown | $25.74 | 8.0% | 1 | 2025 |
| SANOFI-AVENTIS U.S. LLC | Unresolved — no canonical attribution shown | $24.22 | 7.5% | 1 | 2025 |
| PFIZER INC. | Unresolved — no canonical attribution shown | $21.24 | 6.6% | 1 | 2025 |
| Phadia US Inc. | Unresolved — no canonical attribution shown | $18.22 | 5.7% | 1 | 2025 |
| Exact Sciences Corporation | Unresolved — no canonical attribution shown | $16.54 | 5.2% | 1 | 2025 |
| ITI, Inc. (d/b/a Intra-Cellular Therapies, Inc.) | Unresolved — no canonical attribution shown | $15.16 | 4.7% | 1 | 2025 |
What were the payments for?
Payment categories
| Category | Amount | Records |
|---|---|---|
| Food and Beverage | $304.62 | 15 |
| Education | $15.99 | 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 |
|---|---|---|---|---|---|
| BREZTRI Normalized: breztri |
Drug | AstraZeneca Pharmaceuticals LP | $51.65 | 3 | 2025 |
Source payment records
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| REPATHA Normalized: repatha |
Biological | Amgen Inc. | $40.48 | 2 | 2025 |
Source payment records
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| WATCHMAN Normalized: watchman |
Device | Boston Scientific Corporation | $33.78 | 1 | 2025 |
Source payment records
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| REXULTI Normalized: rexulti |
Drug | Otsuka America Pharmaceutical, Inc. | $25.74 | 1 | 2025 |
Source payment records
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| TZIELD Normalized: tzield |
Biological | SANOFI-AVENTIS U.S. LLC | $24.22 | 1 | 2025 |
Source payment records
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| Wegovy Normalized: wegovy |
Drug | Novo Nordisk Inc | $23.41 | 1 | 2025 |
Source payment records
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| OTEZLA Normalized: otezla |
Drug | Amgen Inc. | $22.86 | 1 | 2025 |
Source payment records
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| ELIQUIS Normalized: eliquis |
Drug | PFIZER INC. | $21.24 | 1 | 2025 |
Source payment records
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| NURTEC ODT Normalized: nurtec odt |
Drug | PFIZER INC. | $21.24 | 1 | 2025 |
Source payment records
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| FARXIGA Normalized: farxiga |
Drug | AstraZeneca Pharmaceuticals LP | $20.03 | 1 | 2025 |
Source payment records
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| ImmunoCAP Normalized: immunocap |
Device | Phadia US Inc. | $18.22 | 1 | 2025 |
Source payment records
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| Cologuard Collection Kit Normalized: cologuard collection kit |
Device | Exact Sciences Corporation | $16.54 | 1 | 2025 |
Source payment records
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| CAPLYTA Normalized: caplyta |
Drug | ITI, Inc. (d/b/a Intra-Cellular Therapies, Inc.) | $15.16 | 1 | 2025 |
Source payment records
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| EVENITY Normalized: evenity |
Biological | Amgen Inc. | $13.67 | 1 | 2025 |
Source payment records
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| PROLIA Normalized: prolia |
Biological | Amgen Inc. | $13.67 | 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 | 89 | 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 |
|---|---|---|---|---|---|---|
| Novo Nordisk Inc Exact reporting entity; no affiliate inference |
2025 | Ozempic open payments reported associated product |
CMS Open Payments — General Payments 261625 supporting records · 77793 recipient NPIs · example record 1188130076 |
Ozempic · 2024 Exact normalized brand match · 1 Part D row |
43 | 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 |
89 | 19 |
| SANOFI-AVENTIS U.S. LLC Exact reporting entity; no affiliate inference |
2025 | LANTUS open payments reported associated product |
CMS Open Payments — General Payments 12 supporting records · 11 recipient NPIs · example record 1233196856 |
Lantus · 2024 Exact normalized brand match · 1 Part D row |
19 | suppressed by CMS |
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 | 399 | 104 |
| Levothyroxine Sodium | Levothyroxine Sodium | 293 | 76 |
| Amlodipine Besylate | Amlodipine Besylate | 269 | 75 |
| Lisinopril | Lisinopril | 244 | 67 |
| Metoprolol Succinate | Metoprolol Succinate | 178 | 50 |
| Losartan Potassium | Losartan Potassium | 168 | 41 |
| Hydrochlorothiazide | Hydrochlorothiazide | 140 | 35 |
| Metformin Hcl Er | Metformin Hcl | 136 | 34 |
| Gabapentin | Gabapentin | 131 | 27 |
| Omeprazole | Omeprazole | 120 | 33 |
| Pantoprazole Sodium | Pantoprazole Sodium | 108 | 27 |
| Spironolactone | Spironolactone | 99 | 21 |
| Simvastatin | Simvastatin | 91 | 24 |
| Eliquis | Apixaban | 89 | 19 |
| Tamsulosin Hcl | Tamsulosin Hcl | 82 | 22 |
| Metformin Hcl | Metformin Hcl | 80 | 22 |
| Montelukast Sodium | Montelukast Sodium | 80 | 18 |
| Hydrocodone-Acetaminophen | Hydrocodone/Acetaminophen | 78 | 13 |
| Furosemide | Furosemide | 67 | 16 |
| Rosuvastatin Calcium | Rosuvastatin Calcium | 66 | 19 |
| Tramadol Hcl | Tramadol Hcl | 66 | 17 |
| Trazodone Hcl | Trazodone Hcl | 64 | 11 |
| Allopurinol | Allopurinol | 63 | 16 |
| Synthroid | Levothyroxine Sodium | 58 | 15 |
| Duloxetine Hcl | Duloxetine Hcl | 57 | 12 |
| Escitalopram Oxalate | Escitalopram Oxalate | 56 | 15 |
| Trulicity | Dulaglutide | 56 | 11 |
| Warfarin Sodium | Warfarin Sodium | 56 | 12 |
| Meloxicam | Meloxicam | 55 | 21 |
| Sertraline Hcl | Sertraline Hcl | 53 | 13 |
| Jardiance | Empagliflozin | 52 | 15 |
| Clopidogrel | Clopidogrel Bisulfate | 48 | 11 |
| Pravastatin Sodium | Pravastatin Sodium | 47 | 11 |
| Lisinopril-Hydrochlorothiazide | Lisinopril/Hydrochlorothiazide | 46 | 13 |
| Alprazolam | Alprazolam | 45 | suppressed |
| Dicyclomine Hcl | Dicyclomine Hcl | 45 | suppressed |
| Zolpidem Tartrate | Zolpidem Tartrate | 45 | suppressed |
| Amitriptyline Hcl | Amitriptyline Hcl | 43 | suppressed |
| Cyclobenzaprine Hcl | Cyclobenzaprine Hcl | 43 | 14 |
| Ozempic | Semaglutide | 43 | suppressed |
| Mirtazapine | Mirtazapine | 42 | 11 |
| Pregabalin | Pregabalin | 42 | suppressed |
| Propranolol Hcl | Propranolol Hcl | 38 | suppressed |
| Fenofibrate | Fenofibrate Nanocrystallized | 37 | suppressed |
| Breo Ellipta | Fluticasone/Vilanterol | 35 | suppressed |
| Potassium Chloride | Potassium Chloride | 33 | suppressed |
| Pioglitazone Hcl | Pioglitazone Hcl | 32 | suppressed |
| Pramipexole Dihydrochloride | Pramipexole Di-Hcl | 32 | suppressed |
| Trelegy Ellipta | Fluticasone/Umeclidin/Vilanter | 32 | suppressed |
| Dutasteride | Dutasteride | 31 | suppressed |
| Tizanidine Hcl | Tizanidine Hcl | 31 | suppressed |
| Carvedilol | Carvedilol | 30 | suppressed |
| Chlorthalidone | Chlorthalidone | 30 | suppressed |
| Fluoxetine Hcl | Fluoxetine Hcl | 30 | suppressed |
| Metoprolol Tartrate | Metoprolol Tartrate | 30 | suppressed |
| Albuterol Sulfate Hfa | Albuterol Sulfate | 29 | 17 |
| Xarelto | Rivaroxaban | 29 | suppressed |
| Fluticasone-Salmeterol | Fluticasone Propion/Salmeterol | 28 | suppressed |
| Hydroxyzine Pamoate | Hydroxyzine Pamoate | 28 | suppressed |
| Alendronate Sodium | Alendronate Sodium | 27 | suppressed |
| Anoro Ellipta | Umeclidinium Brm/Vilanterol Tr | 27 | suppressed |
| Doxazosin Mesylate | Doxazosin Mesylate | 26 | suppressed |
| Oxybutynin Chloride Er | Oxybutynin Chloride | 26 | suppressed |
| Prednisone | Prednisone | 26 | 20 |
| Quetiapine Fumarate | Quetiapine Fumarate | 26 | suppressed |
| Atenolol | Atenolol | 25 | suppressed |
| Fluticasone Propionate | Fluticasone Propionate | 24 | suppressed |
| Glipizide Er | Glipizide | 24 | suppressed |
| Ibuprofen | Ibuprofen | 24 | suppressed |
| Nitrofurantoin Mono-Macro | Nitrofurantoin Monohyd/M-Cryst | 24 | 13 |
| Citalopram Hbr | Citalopram Hydrobromide | 23 | suppressed |
| Losartan-Hydrochlorothiazide | Losartan/Hydrochlorothiazide | 22 | suppressed |
| Venlafaxine Hcl Er | Venlafaxine Hcl | 21 | suppressed |
| Diltiazem 24hr Er | Diltiazem Hcl | 20 | suppressed |
| Ezetimibe | Ezetimibe | 20 | suppressed |
| Buspirone Hcl | Buspirone Hcl | 19 | suppressed |
| Lantus | Insulin Glargine,hum.Rec.Anlog | 19 | suppressed |
| Nano 2nd Gen Pen Needle | Pen Needle, Diabetic | 19 | suppressed |
| Valsartan | Valsartan | 19 | suppressed |
| Ventolin Hfa | Albuterol Sulfate | 19 | suppressed |
| Doxycycline Monohydrate | Doxycycline Monohydrate | 17 | 16 |
| Ramipril | Ramipril | 17 | suppressed |
| Valacyclovir | Valacyclovir Hcl | 17 | suppressed |
| Dextroamphetamine-Amphetamine | Dextroamphetamine/Amphetamine | 15 | suppressed |
| Clonazepam | Clonazepam | 14 | suppressed |
| Irbesartan | Irbesartan | 14 | suppressed |
| Lorazepam | Lorazepam | 14 | suppressed |
| Lovastatin | Lovastatin | 14 | suppressed |
| Metolazone | Metolazone | 13 | suppressed |
| Nortriptyline Hcl | Nortriptyline Hcl | 13 | suppressed |
| Nystatin | Nystatin | 13 | suppressed |
| Valsartan-Hydrochlorothiazide | Valsartan/Hydrochlorothiazide | 13 | suppressed |
| Amlodipine Besylate-Benazepril | Amlodipine Besylate/Benazepril | 12 | suppressed |
| Amoxicillin-Clavulanate Potass | Amoxicillin/Potassium Clav | 12 | suppressed |
| Cefdinir | Cefdinir | 12 | 11 |
| Famotidine | Famotidine | 12 | suppressed |
| Mounjaro | Tirzepatide | 12 | suppressed |
| Olanzapine | Olanzapine | 12 | suppressed |
| Esomeprazole Magnesium | Esomeprazole Magnesium | 11 | suppressed |
| Ezetimibe-Simvastatin | Ezetimibe/Simvastatin | 11 | suppressed |
| Glyxambi | Empagliflozin/Linagliptin | 11 | suppressed |
| Hydroxyzine Hcl | Hydroxyzine Hcl | 11 | suppressed |
| Lansoprazole | Lansoprazole | 11 | suppressed |
| Lidocaine | Lidocaine | 11 | suppressed |
| Morphine Sulfate Er | Morphine Sulfate | 11 | suppressed |
| Olmesartan Medoxomil | Olmesartan Medoxomil | 11 | suppressed |
| Paroxetine Hcl | Paroxetine 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 | $320.61 · 16 records | AstraZeneca Pharmaceuticals LP | BREZTRI, CAPLYTA, Cologuard Collection Kit, ELIQUIS, EVENITY, FARXIGA, ImmunoCAP, NURTEC ODT, OTEZLA, PROLIA, REPATHA, REXULTI, TZIELD, WATCHMAN, Wegovy | 3 | — |
| 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 Novo Nordisk 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