Healthcare provider profile · identity verified

William Lawrence Nelson, MD

Internal Medicine · ELGIN, IL · NPI 1326051640

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 Calcium16642
Amlodipine BesylateAmlodipine Besylate10829
Levothyroxine SodiumLevothyroxine Sodium9726
Metformin HclMetformin Hcl9528
SimvastatinSimvastatin8923
AlprazolamAlprazolam8715
OmeprazoleOmeprazole8326
PrednisonePrednisone8132
LisinoprilLisinopril7919
Hydrocodone-AcetaminophenHydrocodone/Acetaminophen75suppressed
JanuviaSitagliptin Phosphate6611
FurosemideFurosemide6319
GabapentinGabapentin6312
Sertraline HclSertraline Hcl6011
Metoprolol TartrateMetoprolol Tartrate5919
Zolpidem TartrateZolpidem Tartrate5913
LorazepamLorazepam57suppressed
Metoprolol SuccinateMetoprolol Succinate5214
Warfarin SodiumWarfarin Sodium52suppressed
AtenololAtenolol4912
Enalapril MaleateEnalapril Maleate4612
NaproxenNaproxen4613
Paroxetine HclParoxetine Hcl45suppressed
HydrochlorothiazideHydrochlorothiazide4114
Tamsulosin HclTamsulosin Hcl4011
Rosuvastatin CalciumRosuvastatin Calcium39suppressed
AllopurinolAllopurinol38suppressed
Cyclobenzaprine HclCyclobenzaprine Hcl38suppressed
Fluoxetine HclFluoxetine Hcl35suppressed
GlipizideGlipizide33suppressed
Losartan PotassiumLosartan Potassium33suppressed
ClopidogrelClopidogrel Bisulfate29suppressed
Amoxicillin-Clavulanate PotassAmoxicillin/Potassium Clav2716
Fluticasone PropionateFluticasone Propionate27suppressed
OxycontinOxycodone Hcl24suppressed
Lantus SolostarInsulin Glargine,hum.Rec.Anlog23suppressed
Meclizine HclMeclizine Hcl23suppressed
Pantoprazole SodiumPantoprazole Sodium23suppressed
Pravastatin SodiumPravastatin Sodium23suppressed
Tramadol HclTramadol Hcl23suppressed
LovastatinLovastatin22suppressed
EliquisApixaban21suppressed
AzithromycinAzithromycin2011
Ibandronate SodiumIbandronate Sodium20suppressed
LantusInsulin Glargine,hum.Rec.Anlog20suppressed
Bisoprolol-HydrochlorothiazideBisoprolol/Hydrochlorothiazide19suppressed
CelecoxibCelecoxib19suppressed
CephalexinCephalexin19suppressed
Fluticasone-SalmeterolFluticasone Propion/Salmeterol19suppressed
XareltoRivaroxaban19suppressed
Albuterol Sulfate HfaAlbuterol Sulfate18suppressed
DiazepamDiazepam18suppressed
Diclofenac SodiumDiclofenac Sodium18suppressed
Esomeprazole MagnesiumEsomeprazole Magnesium18suppressed
Oxybutynin Chloride ErOxybutynin Chloride18suppressed
Bupropion Hcl SrBupropion Hcl17suppressed
OlanzapineOlanzapine17suppressed
Metformin Hcl ErMetformin Hcl15suppressed
Sumatriptan SuccinateSumatriptan Succinate15suppressed
SynthroidLevothyroxine Sodium15suppressed
BaclofenBaclofen13suppressed
CarvedilolCarvedilol13suppressed
Hydroxyzine PamoateHydroxyzine Pamoate13suppressed
LevofloxacinLevofloxacin1311
NabumetoneNabumetone13suppressed
Oxybutynin ChlorideOxybutynin Chloride13suppressed
PregabalinPregabalin13suppressed
Trazodone HclTrazodone Hcl13suppressed
Amlodipine Besylate-BenazeprilAmlodipine Besylate/Benazepril12suppressed
Incruse ElliptaUmeclidinium Bromide12suppressed
Oxycodone HclOxycodone Hcl12suppressed
Carbidopa-LevodopaCarbidopa/Levodopa11suppressed
Ondansetron HclOndansetron Hcl11suppressed
Oxycodone-AcetaminophenOxycodone Hcl/Acetaminophen11suppressed
SpironolactoneSpironolactone11suppressed

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