Healthcare provider profile · identity verified

David Janssen, M.D.

Family Practice · DAVENPORT, IA · NPI 1760862387

Profile state: partd only 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

We did not find matching Open Payments records for this doctor in 2025.

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

Payment overview · 2025

General Payments

We did not find matching Open Payments records for this doctor in the selected program year.

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.

Analysis 1 · Payment-linked products

Products named in Open Payments records

No payment-linked product analysis is available because no matching General Payment records were found for the selected year.

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.

There is no payer-company set available for this comparison.

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 Calcium16633
OmeprazoleOmeprazole16430
EliquisApixaban15917
Sertraline HclSertraline Hcl14322
FurosemideFurosemide14118
Pantoprazole SodiumPantoprazole Sodium13722
Amlodipine BesylateAmlodipine Besylate12924
Metformin Hcl ErMetformin Hcl12320
Potassium ChloridePotassium Chloride12315
Warfarin SodiumWarfarin Sodium121suppressed
Levothyroxine SodiumLevothyroxine Sodium11519
Losartan PotassiumLosartan Potassium11518
Tamsulosin HclTamsulosin Hcl10920
GabapentinGabapentin10017
Metoprolol SuccinateMetoprolol Succinate9413
Donepezil HclDonepezil Hcl8511
SpironolactoneSpironolactone85suppressed
Rosuvastatin CalciumRosuvastatin Calcium6714
LisinoprilLisinopril6516
SimvastatinSimvastatin59suppressed
ClopidogrelClopidogrel Bisulfate54suppressed
FinasterideFinasteride54suppressed
Montelukast SodiumMontelukast Sodium54suppressed
PrednisonePrednisone5031
Metoprolol TartrateMetoprolol Tartrate49suppressed
Oxybutynin ChlorideOxybutynin Chloride41suppressed
Zolpidem TartrateZolpidem Tartrate41suppressed
ChlorthalidoneChlorthalidone40suppressed
HydrochlorothiazideHydrochlorothiazide40suppressed
Oxybutynin Chloride ErOxybutynin Chloride38suppressed
MeloxicamMeloxicam37suppressed
MirtazapineMirtazapine36suppressed
Metformin HclMetformin Hcl34suppressed
Tramadol HclTramadol Hcl34suppressed
Amitriptyline HclAmitriptyline Hcl32suppressed
Duloxetine HclDuloxetine Hcl32suppressed
Memantine HclMemantine Hcl32suppressed
BumetanideBumetanide31suppressed
ClonazepamClonazepam29suppressed
LorazepamLorazepam29suppressed
OzempicSemaglutide28suppressed
Citalopram HbrCitalopram Hydrobromide27suppressed
CarvedilolCarvedilol26suppressed
DigoxinDigoxin26suppressed
OlanzapineOlanzapine25suppressed
Fluoxetine HclFluoxetine Hcl24suppressed
Triamcinolone AcetonideTriamcinolone Acetonide24suppressed
Albuterol Sulfate HfaAlbuterol Sulfate2312
Alendronate SodiumAlendronate Sodium22suppressed
BudesonideBudesonide22suppressed
Carbidopa-LevodopaCarbidopa/Levodopa22suppressed
JanuviaSitagliptin Phosphate22suppressed
Escitalopram OxalateEscitalopram Oxalate21suppressed
Fluticasone PropionateFluticasone Propionate21suppressed
Hydromorphone HclHydromorphone Hcl21suppressed
Isosorbide Mononitrate ErIsosorbide Mononitrate21suppressed
Losartan-HydrochlorothiazideLosartan/Hydrochlorothiazide21suppressed
Trazodone HclTrazodone Hcl21suppressed
Venlafaxine Hcl ErVenlafaxine Hcl21suppressed
Triamterene-HydrochlorothiazidTriamterene/Hydrochlorothiazid20suppressed
Diltiazem 24hr Er (Cd)Diltiazem Hcl18suppressed
FamotidineFamotidine18suppressed
JantovenWarfarin Sodium18suppressed
XareltoRivaroxaban18suppressed
Ciprofloxacin HclCiprofloxacin Hcl1714
Humalog Mix 75-25 KwikpenInsulin Lispro Protamin/Lispro17suppressed
Boostrix TdapDiphth,pertuss(Acell),tet Vac1616
Buspirone HclBuspirone Hcl16suppressed
CephalexinCephalexin1614
Enalapril MaleateEnalapril Maleate16suppressed
Bisoprolol FumarateBisoprolol Fumarate15suppressed
CelecoxibCelecoxib15suppressed
NyamycNystatin15suppressed
Pravastatin SodiumPravastatin Sodium15suppressed
Valsartan-HydrochlorothiazideValsartan/Hydrochlorothiazide15suppressed
AllopurinolAllopurinol14suppressed
Cinacalcet HclCinacalcet Hcl14suppressed
Diltiazem 24hr Er (La)Diltiazem Hcl14suppressed
Glipizide ErGlipizide14suppressed
Hydroxyzine HclHydroxyzine Hcl14suppressed
Memantine Hcl ErMemantine Hcl14suppressed
PregabalinPregabalin14suppressed
Venlafaxine HclVenlafaxine Hcl14suppressed
Vilazodone HclVilazodone Hcl14suppressed
Hydrocodone-AcetaminophenHydrocodone/Acetaminophen13suppressed
Lantus SolostarInsulin Glargine,hum.Rec.Anlog13suppressed
Nortriptyline HclNortriptyline Hcl13suppressed
Ropinirole HclRopinirole Hcl13suppressed
TorsemideTorsemide13suppressed
Acebutolol HclAcebutolol Hcl12suppressed
Amiodarone HclAmiodarone Hcl12suppressed
Arnuity ElliptaFluticasone Furoate12suppressed
Doxycycline HyclateDoxycycline Hyclate1212
PhenobarbitalPhenobarbital12suppressed
PindololPindolol12suppressed
Amoxicillin-Clavulanate PotassAmoxicillin/Potassium Clav11suppressed
RestasisCyclosporine11suppressed
TestosteroneTestosterone11suppressed

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
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