Healthcare provider profile · identity verified

David Ansell, M.D.

Allopathic & Osteopathic Physicians|Internal Medicine · CHICAGO, IL · NPI 1003918004

Profile state: payments and partd Open Payments: 2025 Medicare Part D: 2024 Last identity check: 2026-08-10 Page data build: 2026-08-12

Verified facts

What the public records show

CMS Open Payments records show David Ansell, M.D. received $1,545.00 in general payments during 2025 across 1 reported records.

Genentech USA, Inc. accounted for 100.0% of that reported general-payment amount.

These records do not establish that a payment influenced prescribing or medical care.

Payment overview · 2025

General Payments

$1,545.00

1 reported records · 1 companies

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 companyCanonical companyAmountShareRecordsYear
Genentech USA, Inc. Unresolved — no canonical attribution shown $1,545.00100.0%12025

What were the payments for?

Payment categories

CategoryAmountRecords
Consulting Fee$1,545.001

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

Payment records were found, but the reported records did not identify a specific associated product for this analysis.

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.

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

BrandGenericClaimsBeneficiaries
Atorvastatin CalciumAtorvastatin Calcium14046
Amlodipine BesylateAmlodipine Besylate10031
Hydrocodone-AcetaminophenHydrocodone/Acetaminophen7212
OmeprazoleOmeprazole6513
GabapentinGabapentin5915
HydrochlorothiazideHydrochlorothiazide4816
Metoprolol SuccinateMetoprolol Succinate4311
Metformin HclMetformin Hcl4212
Tamsulosin HclTamsulosin Hcl4113
OzempicSemaglutide40suppressed
Acetaminophen-CodeineAcetaminophen With Codeine39suppressed
IbuprofenIbuprofen37suppressed
FurosemideFurosemide36suppressed
Amlodipine Besylate-BenazeprilAmlodipine Besylate/Benazepril3411
ClonazepamClonazepam32suppressed
Levothyroxine SodiumLevothyroxine Sodium32suppressed
JardianceEmpagliflozin28suppressed
Losartan PotassiumLosartan Potassium28suppressed
Rosuvastatin CalciumRosuvastatin Calcium28suppressed
Sertraline HclSertraline Hcl27suppressed
Albuterol Sulfate HfaAlbuterol Sulfate25suppressed
LisinoprilLisinopril24suppressed
SimvastatinSimvastatin23suppressed
Meclizine HclMeclizine Hcl22suppressed
LidocaineLidocaine21suppressed
FinasterideFinasteride20suppressed
Ondansetron HclOndansetron Hcl20suppressed
Pantoprazole SodiumPantoprazole Sodium20suppressed
CarvedilolCarvedilol19suppressed
AllopurinolAllopurinol18suppressed
Diclofenac SodiumDiclofenac Sodium18suppressed
Doxazosin MesylateDoxazosin Mesylate18suppressed
Enalapril MaleateEnalapril Maleate18suppressed
Escitalopram OxalateEscitalopram Oxalate18suppressed
SpironolactoneSpironolactone18suppressed
Lisinopril-HydrochlorothiazideLisinopril/Hydrochlorothiazide17suppressed
Metformin Hcl ErMetformin Hcl17suppressed
Hydroxyzine HclHydroxyzine Hcl16suppressed
Metoprolol TartrateMetoprolol Tartrate16suppressed
Alendronate SodiumAlendronate Sodium15suppressed
Fluticasone PropionateFluticasone Propionate15suppressed
Hydromorphone HclHydromorphone Hcl15suppressed
PregabalinPregabalin15suppressed
BaclofenBaclofen14suppressed
Cyclobenzaprine HclCyclobenzaprine Hcl14suppressed
Humalog Mix 75-25 KwikpenInsulin Lispro Protamin/Lispro14suppressed
LactuloseLactulose14suppressed
Montelukast SodiumMontelukast Sodium14suppressed
Oxybutynin Chloride ErOxybutynin Chloride14suppressed
SymbicortBudesonide/Formoterol Fumarate14suppressed
EliquisApixaban13suppressed
Lantus SolostarInsulin Glargine,hum.Rec.Anlog13suppressed
MupirocinMupirocin13suppressed
ValacyclovirValacyclovir Hcl13suppressed
LevetiracetamLevetiracetam11suppressed
PrednisonePrednisone11suppressed

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.

YearGeneral PaymentsMain payerExplicit productsCompany overlapsPart D coverage
2025 $1,545.00 · 1 records Genentech USA, Inc.
2024 Complete

Questions to ask

Questions you could discuss with your doctor

These are general questions generated from reviewed templates. They are not personalized medical advice.

Sources and limitations

How to read this page

Loaded source releases

DatasetYearPublicationSource
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

Methodology version: 2.1

Editorial template version: 2.4

Product contract version: 2.0

Schema version: 0.7.0

Page data build: 2026-08-12T23:34:59.370714+00:00

Publication policy: eligible for indexing after public-launch controls are enabled

Full methodology · Questions & answers · Report a possible error