Healthcare provider profile · identity verified

David Lee Willis, GNP

Nurse Practitioner · MCKINNEY, TX · NPI 1689703134

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 Calcium20672
Amlodipine BesylateAmlodipine Besylate17262
Levothyroxine SodiumLevothyroxine Sodium16544
GabapentinGabapentin15764
OmeprazoleOmeprazole14041
Losartan PotassiumLosartan Potassium13851
FurosemideFurosemide13756
Tramadol HclTramadol Hcl13441
Montelukast SodiumMontelukast Sodium13048
Pantoprazole SodiumPantoprazole Sodium12052
Acetaminophen-CodeineAcetaminophen With Codeine11229
Metformin HclMetformin Hcl11235
LisinoprilLisinopril10736
Albuterol Sulfate HfaAlbuterol Sulfate9530
Fluticasone PropionateFluticasone Propionate9133
AlprazolamAlprazolam8822
Sertraline HclSertraline Hcl8328
CarvedilolCarvedilol8228
Trazodone HclTrazodone Hcl8130
Metoprolol SuccinateMetoprolol Succinate8025
EliquisApixaban7423
Tamsulosin HclTamsulosin Hcl7024
Potassium ChloridePotassium Chloride6025
SimvastatinSimvastatin5715
ClonazepamClonazepam54suppressed
AllopurinolAllopurinol5116
ClopidogrelClopidogrel Bisulfate5018
Nitrofurantoin Mono-MacroNitrofurantoin Monohyd/M-Cryst5030
Oxybutynin Chloride ErOxybutynin Chloride4515
Rosuvastatin CalciumRosuvastatin Calcium4516
PregabalinPregabalin4411
CelecoxibCelecoxib4216
Quetiapine FumarateQuetiapine Fumarate4213
VascepaIcosapent Ethyl4112
Cyclobenzaprine HclCyclobenzaprine Hcl4011
Vitamin D2Ergocalciferol (Vitamin D2)4018
Diclofenac SodiumDiclofenac Sodium3924
Hydralazine HclHydralazine Hcl38suppressed
LidocaineLidocaine3711
HydrochlorothiazideHydrochlorothiazide3618
Metoprolol TartrateMetoprolol Tartrate3613
Pravastatin SodiumPravastatin Sodium3616
Donepezil HclDonepezil Hcl3514
EzetimibeEzetimibe3512
AzithromycinAzithromycin3429
GlipizideGlipizide3411
CephalexinCephalexin3330
Duloxetine HclDuloxetine Hcl3112
MirtazapineMirtazapine3111
Zolpidem TartrateZolpidem Tartrate31suppressed
OzempicSemaglutide29suppressed
Ondansetron HclOndansetron Hcl2821
Buspirone HclBuspirone Hcl2712
SpironolactoneSpironolactone27suppressed
BaclofenBaclofen26suppressed
FamotidineFamotidine26suppressed
Ultra-Fine Short Pen NeedlePen Needle, Diabetic26suppressed
Esomeprazole MagnesiumEsomeprazole Magnesium25suppressed
Megestrol AcetateMegestrol Acetate2513
MeloxicamMeloxicam2513
AmoxicillinAmoxicillin2319
Azelastine HclAzelastine Hcl2311
Glipizide ErGlipizide23suppressed
Losartan-HydrochlorothiazideLosartan/Hydrochlorothiazide23suppressed
NystatinNystatin2314
Chlorhexidine GluconateChlorhexidine Gluconate22suppressed
Nifedipine ErNifedipine2211
PrednisonePrednisone22suppressed
Triamcinolone AcetonideTriamcinolone Acetonide2213
HydrocortisoneHydrocortisone21suppressed
MethocarbamolMethocarbamol21suppressed
Basaglar Kwikpen U-100Insulin Glargine,hum.Rec.Anlog20suppressed
Alendronate SodiumAlendronate Sodium19suppressed
LactuloseLactulose1916
Lantus SolostarInsulin Glargine,hum.Rec.Anlog19suppressed
Tizanidine HclTizanidine Hcl19suppressed
Isosorbide Mononitrate ErIsosorbide Mononitrate18suppressed
LevofloxacinLevofloxacin1813
Meclizine HclMeclizine Hcl18suppressed
MethotrexateMethotrexate Sodium18suppressed
Breo ElliptaFluticasone/Vilanterol17suppressed
LorazepamLorazepam17suppressed
TradjentaLinagliptin17suppressed
Breztri AerosphereBudesonide/Glycopyr/Formoterol16suppressed
BumetanideBumetanide16suppressed
Ciprofloxacin HclCiprofloxacin Hcl1614
Citalopram HbrCitalopram Hydrobromide16suppressed
Levemir FlexpenInsulin Detemir16suppressed
AtenololAtenolol15suppressed
Escitalopram OxalateEscitalopram Oxalate15suppressed
Hydroxyzine HclHydroxyzine Hcl15suppressed
JanuviaSitagliptin Phosphate15suppressed
MupirocinMupirocin15suppressed
Amoxicillin-Clavulanate PotassAmoxicillin/Potassium Clav1413
Memantine HclMemantine Hcl14suppressed
Amiodarone HclAmiodarone Hcl13suppressed
Clonidine HclClonidine Hcl13suppressed
Fluoxetine HclFluoxetine Hcl13suppressed
Incruse ElliptaUmeclidinium Bromide13suppressed
NateglinideNateglinide13suppressed
Spiriva RespimatTiotropium Bromide13suppressed
DiazepamDiazepam12suppressed
FarxigaDapagliflozin Propanediol12suppressed
FenofibrateFenofibrate12suppressed
GlycopyrrolateGlycopyrrolate12suppressed
RybelsusSemaglutide12suppressed
Sulfamethoxazole-TrimethoprimSulfamethoxazole/Trimethoprim1211
Chlordiazepoxide HclChlordiazepoxide Hcl11suppressed
Dantrolene SodiumDantrolene Sodium11suppressed
DigoxinDigoxin11suppressed
FinasterideFinasteride11suppressed
IbuprofenIbuprofen11suppressed
LacosamideLacosamide11suppressed
MyrbetriqMirabegron11suppressed
Oxybutynin ChlorideOxybutynin Chloride11suppressed

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