Payment overview · 2025
General Payments
$82,935.27
249 reported records · 28 companies
Healthcare provider profile · identity verified
David B Leff, DO
Allopathic & Osteopathic Physicians|Internal Medicine|Gastroenterology · MESA, AZ · NPI 1619956505
Verified facts
What the public records show
CMS Open Payments records show David B Leff, DO received $82,935.27 in general payments during 2025 across 249 reported records.
GENZYME CORPORATION accounted for 39.2% of that reported general-payment amount.
The Open Payments records used for this analysis explicitly named 32 associated products.
A separate comparison found the same explicitly named product in public Medicare Part D data: Zenpep.
ABBVIE 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 LINZESS as an associated drug or biological on 87954 records involving 21815 distinct recipient NPIs. Public Medicare Part D data also shows 89 claims for Linzess by this doctor in 2024.
Aimmune Therapeutics, 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 ZENPEP as an associated drug or biological on 32144 records involving 12432 distinct recipient NPIs. Public Medicare Part D data also shows 33 claims for Zenpep by this doctor in 2024.
Ferring Pharmaceuticals 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 CLENPIQ as an associated drug or biological on 186 records involving 159 distinct recipient NPIs. Public Medicare Part D data also shows 41 claims for Clenpiq 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 |
|---|---|---|---|---|---|
| GENZYME CORPORATION | Unresolved — no canonical attribution shown | $32,533.58 | 39.2% | 30 | 2025 |
| ABBVIE INC. | Unresolved — no canonical attribution shown | $21,859.39 | 26.4% | 58 | 2025 |
| Regeneron Healthcare Solutions, Inc. | Unresolved — no canonical attribution shown | $18,301.37 | 22.1% | 24 | 2025 |
| Aimmune Therapeutics, Inc. | Unresolved — no canonical attribution shown | $5,827.55 | 7.0% | 24 | 2025 |
| Madrigal Pharmaceuticals | Unresolved — no canonical attribution shown | $981.35 | 1.2% | 16 | 2025 |
| Ardelyx, Inc. | Unresolved — no canonical attribution shown | $471.47 | 0.6% | 10 | 2025 |
| Lilly USA, LLC | Unresolved — no canonical attribution shown | $465.43 | 0.6% | 7 | 2025 |
| Janssen Biotech, Inc. | Unresolved — no canonical attribution shown | $414.32 | 0.5% | 17 | 2025 |
| PFIZER INC. | Unresolved — no canonical attribution shown | $353.22 | 0.4% | 15 | 2025 |
| Gilead Sciences, Inc. | Unresolved — no canonical attribution shown | $326.66 | 0.4% | 3 | 2025 |
| Janssen Scientific Affairs, LLC | Unresolved — no canonical attribution shown | $307.25 | 0.4% | 3 | 2025 |
| Celltrion USA Inc. | Unresolved — no canonical attribution shown | $150.90 | 0.2% | 4 | 2025 |
| Phathom Pharmaceuticals, Inc. | Unresolved — no canonical attribution shown | $143.80 | 0.2% | 15 | 2025 |
| Boston Scientific Corporation | Unresolved — no canonical attribution shown | $128.10 | 0.1% | 1 | 2025 |
| Intercept Pharmaceuticals, Inc. | Unresolved — no canonical attribution shown | $125.00 | 0.1% | 1 | 2025 |
| INTUITIVE SURGICAL, INC. | Unresolved — no canonical attribution shown | $116.77 | 0.1% | 1 | 2025 |
| Ipsen Biopharmaceuticals, Inc | Unresolved — no canonical attribution shown | $105.66 | 0.1% | 5 | 2025 |
| Pulmonx Corporation | Unresolved — no canonical attribution shown | $64.18 | 0.1% | 3 | 2025 |
| Baxter Healthcare | Unresolved — no canonical attribution shown | $61.12 | 0.1% | 3 | 2025 |
| United Therapeutics Corporation | Unresolved — no canonical attribution shown | $27.47 | 0.0% | 1 | 2025 |
| Abbott Laboratories | Unresolved — no canonical attribution shown | $27.04 | 0.0% | 1 | 2025 |
| Insmed, Inc. | Unresolved — no canonical attribution shown | $26.69 | 0.0% | 1 | 2025 |
| QOL Medical, LLC | Unresolved — no canonical attribution shown | $22.64 | 0.0% | 1 | 2025 |
| Biocon Biologics Inc | Unresolved — no canonical attribution shown | $21.66 | 0.0% | 1 | 2025 |
| Merck Sharp & Dohme LLC | Unresolved — no canonical attribution shown | $21.57 | 0.0% | 1 | 2025 |
| Novo Nordisk Inc | Unresolved — no canonical attribution shown | $19.17 | 0.0% | 1 | 2025 |
| Electromed, Inc. | Unresolved — no canonical attribution shown | $17.11 | 0.0% | 1 | 2025 |
| Ferring Pharmaceuticals Inc. | Unresolved — no canonical attribution shown | $14.80 | 0.0% | 1 | 2025 |
What were the payments for?
Payment categories
| Category | Amount | Records |
|---|---|---|
| Compensation for services other than consulting, including serving as faculty or as a speaker at a venue other than a continuing education program | $70,188.66 | 22 |
| Food and Beverage | $7,568.97 | 195 |
| Travel and Lodging | $5,177.64 | 32 |
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 |
|---|---|---|---|---|---|
| DUPIXENT Normalized: dupixent |
Biological | GENZYME CORPORATION, Regeneron Healthcare Solutions, Inc. | $44,297.27 | 49 | 2025 |
Source payment records
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| RINVOQ Normalized: rinvoq |
Biological | ABBVIE INC. | $13,358.97 | 38 | 2025 |
Source payment records
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| SKYRIZI Normalized: skyrizi |
Biological | ABBVIE INC. | $8,905.34 | 44 | 2025 |
Source payment records
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| ZENPEP Normalized: zenpep |
Drug | Aimmune Therapeutics, Inc. | $5,827.55 | 24 | 2025 |
Source payment records
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| REZDIFFRA Normalized: rezdiffra |
Drug | Madrigal Pharmaceuticals | $981.35 | 16 | 2025 |
Source payment records
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| TREMFYA Normalized: tremfya |
Drug | Janssen Biotech, Inc., Janssen Scientific Affairs, LLC | $721.57 | 20 | 2025 |
Source payment records
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| IBSRELA Normalized: ibsrela |
Drug | Ardelyx, Inc. | $471.47 | 10 | 2025 |
Source payment records
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| VELSIPITY Normalized: velsipity |
Drug | PFIZER INC. | $347.07 | 14 | 2025 |
Source payment records
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| OMVOH Normalized: omvoh |
Drug | Lilly USA, LLC | $163.09 | 4 | 2025 |
Source payment records
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| VEGZELMA Normalized: vegzelma |
Biological | Celltrion USA Inc. | $150.90 | 4 | 2025 |
Source payment records
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| VOQUEZNA Normalized: voquezna |
Drug | Phathom Pharmaceuticals, Inc. | $143.80 | 15 | 2025 |
Source payment records
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| General - Therapies Normalized: general therapies |
Device | Boston Scientific Corporation | $128.10 | 1 | 2025 |
Source payment records
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| OCALIVA Normalized: ocaliva |
Drug | Intercept Pharmaceuticals, Inc. | $125.00 | 1 | 2025 |
Source payment records
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| Da Vinci Surgical System Normalized: da vinci surgical system |
Device | INTUITIVE SURGICAL, INC. | $116.77 | 1 | 2025 |
Source payment records
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| IQIRVO Normalized: iqirvo |
Drug | Ipsen Biopharmaceuticals, Inc | $105.66 | 5 | 2025 |
Source payment records
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| CHARTIS CATHETER Normalized: chartis catheter |
Device | Pulmonx Corporation | $64.18 | 3 | 2025 |
Source payment records
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| PULMONX CHARTIS TABLET CONSOLE Normalized: pulmonx chartis tablet console |
Device | Pulmonx Corporation | $64.18 | 3 | 2025 |
Source payment records
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| ZEPHYR DELIVERY CATHETER Normalized: zephyr delivery catheter |
Device | Pulmonx Corporation | $64.18 | 3 | 2025 |
Source payment records
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| ZEPHYR ENDOBRONCHIAL VALVE Normalized: zephyr endobronchial valve |
Device | Pulmonx Corporation | $64.18 | 3 | 2025 |
Source payment records
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| XELJANZ Normalized: xeljanz |
Drug | PFIZER INC. | $61.48 | 7 | 2025 |
Source payment records
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| Hillrom - Vest System Model 105 Home Care Normalized: hillrom vest system model 105 home care |
Device | Baxter Healthcare | $61.12 | 3 | 2025 |
Source payment records
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| Tyvaso Normalized: tyvaso |
Drug | United Therapeutics Corporation | $27.47 | 1 | 2025 |
Source payment records
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| FREESTYLE LIBRE 3 Normalized: freestyle libre 3 |
Device | Abbott Laboratories | $27.04 | 1 | 2025 |
Source payment records
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| MAVYRET Normalized: mavyret |
Drug | ABBVIE INC. | $26.97 | 1 | 2025 |
Source payment records
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| Arikayce Normalized: arikayce |
Drug | Insmed, Inc. | $26.69 | 1 | 2025 |
Source payment records
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| Sucraid Normalized: sucraid |
Drug | QOL Medical, LLC | $22.64 | 1 | 2025 |
Source payment records
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| Yesintek Normalized: yesintek |
Biological | Biocon Biologics Inc | $21.66 | 1 | 2025 |
Source payment records
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| ZERBAXA Normalized: zerbaxa |
Drug | Merck Sharp & Dohme LLC | $21.57 | 1 | 2025 |
Source payment records
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| Wegovy Normalized: wegovy |
Drug | Novo Nordisk Inc | $19.17 | 1 | 2025 |
Source payment records
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| ZEPBOUND Normalized: zepbound |
Drug | Lilly USA, LLC | $18.13 | 1 | 2025 |
Source payment records
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| SMARTVEST Normalized: smartvest |
Device | Electromed, Inc. | $17.11 | 1 | 2025 |
Source payment records
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| REBYOTA Normalized: rebyota |
Biological | Ferring Pharmaceuticals Inc. | $14.80 | 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 |
|---|---|---|---|---|---|---|
| ZENPEP zenpep |
2025 | Zenpep | 2024 | 33 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 |
|---|---|---|---|---|---|---|
| ABBVIE INC. Exact reporting entity; no affiliate inference |
2025 | LINZESS open payments reported associated product |
CMS Open Payments — General Payments 87954 supporting records · 21815 recipient NPIs · example record 1201352608 |
Linzess · 2024 Exact normalized brand match · 1 Part D row |
89 | 31 |
| Aimmune Therapeutics, Inc. Exact reporting entity; no affiliate inference |
2025 | ZENPEP open payments reported associated product |
CMS Open Payments — General Payments 32144 supporting records · 12432 recipient NPIs · example record 1249641927 |
Zenpep · 2024 Exact normalized brand match · 1 Part D row |
33 | suppressed by CMS |
| Ferring Pharmaceuticals Inc. Exact reporting entity; no affiliate inference |
2025 | CLENPIQ open payments reported associated product |
CMS Open Payments — General Payments 186 supporting records · 159 recipient NPIs · example record 1242056478 |
Clenpiq · 2024 Exact normalized brand match · 1 Part D row |
41 | 41 |
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 |
|---|---|---|---|
| Pantoprazole Sodium | Pantoprazole Sodium | 312 | 105 |
| Sod Sulf-Potass Sulf-Mag Sulf | Sodium, Potassium,mag Sulfates | 118 | 117 |
| Linzess | Linaclotide | 89 | 31 |
| Omeprazole | Omeprazole | 82 | 31 |
| Lansoprazole | Lansoprazole | 51 | 17 |
| Gavilyte-G | Peg3350/Sod Sulf,bicarb,cl/Kcl | 42 | 42 |
| Clenpiq | Sod Picosulf/Mag Ox/Citric Ac | 41 | 41 |
| Dicyclomine Hcl | Dicyclomine Hcl | 34 | suppressed |
| Plenvu | Peg3350/Sod Sul/Nacl/Kcl/Asb/C | 33 | 33 |
| Zenpep | Lipase/Protease/Amylase | 33 | suppressed |
| Lactulose | Lactulose | 27 | 11 |
| Mesalamine | Mesalamine | 25 | suppressed |
| Humira(Cf) Pen | Adalimumab | 24 | suppressed |
| Xifaxan | Rifaximin | 23 | suppressed |
| Trulance | Plecanatide | 22 | suppressed |
| Famotidine | Famotidine | 20 | suppressed |
| Dexlansoprazole Dr | Dexlansoprazole | 18 | suppressed |
| Ondansetron Hcl | Ondansetron Hcl | 15 | suppressed |
| Peg-3350 And Electrolytes | Peg3350/Sod Sulf,bicarb,cl/Kcl | 15 | 15 |
| Esomeprazole Magnesium | Esomeprazole Magnesium | 14 | suppressed |
| Dexilant | Dexlansoprazole | 13 | suppressed |
| Budesonide Ec | Budesonide | 11 | suppressed |
| Spironolactone | Spironolactone | 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 | $82,935.27 · 249 records | GENZYME CORPORATION | Arikayce, CHARTIS CATHETER, DUPIXENT, Da Vinci Surgical System, FREESTYLE LIBRE 3, General - Therapies, Hillrom - Vest System Model 105 Home Care, IBSRELA, IQIRVO, MAVYRET, OCALIVA, OMVOH, PULMONX CHARTIS TABLET CONSOLE, REBYOTA, REZDIFFRA, RINVOQ, SKYRIZI, SMARTVEST, Sucraid, TREMFYA, Tyvaso, VEGZELMA, VELSIPITY, VOQUEZNA, Wegovy, XELJANZ, Yesintek, ZENPEP, ZEPBOUND, ZEPHYR DELIVERY CATHETER, ZEPHYR ENDOBRONCHIAL VALVE, ZERBAXA | 3 | — |
| 2024 | — | — | — | — | Complete |
Questions to ask
Questions you could discuss with your doctor
- What role, if any, does Zenpep play in your treatment recommendations for me?
- How do you evaluate evidence when you have a financial relationship with ABBVIE 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