Healthcare provider profile · identity verified

Mark Allen Drexler, MD

Family Practice · GLENVIEW, IL · NPI 1821105057

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 Calcium468146
Levothyroxine SodiumLevothyroxine Sodium29586
Losartan PotassiumLosartan Potassium29387
Metoprolol SuccinateMetoprolol Succinate27279
Amlodipine BesylateAmlodipine Besylate25973
Rosuvastatin CalciumRosuvastatin Calcium25379
OmeprazoleOmeprazole24580
LisinoprilLisinopril24475
Tamsulosin HclTamsulosin Hcl17554
GabapentinGabapentin15854
FurosemideFurosemide15653
Pantoprazole SodiumPantoprazole Sodium15243
Tramadol HclTramadol Hcl14736
EliquisApixaban14333
SimvastatinSimvastatin13941
HydrochlorothiazideHydrochlorothiazide13845
Trazodone HclTrazodone Hcl13745
Metformin HclMetformin Hcl12736
CarvedilolCarvedilol11738
FamotidineFamotidine11438
MirtazapineMirtazapine10936
Escitalopram OxalateEscitalopram Oxalate10232
Sertraline HclSertraline Hcl10027
Duloxetine HclDuloxetine Hcl9529
OzempicSemaglutide8918
Memantine HclMemantine Hcl8515
FinasterideFinasteride7827
Fluticasone PropionateFluticasone Propionate7634
MyrbetriqMirabegron7618
ValsartanValsartan6922
AllopurinolAllopurinol6721
ClopidogrelClopidogrel Bisulfate6723
Metformin Hcl ErMetformin Hcl6721
SpironolactoneSpironolactone6418
Alendronate SodiumAlendronate Sodium6116
Venlafaxine Hcl ErVenlafaxine Hcl5915
Ipratropium BromideIpratropium Bromide5816
Donepezil HclDonepezil Hcl5614
Metoprolol TartrateMetoprolol Tartrate5214
EzetimibeEzetimibe5115
Quetiapine FumarateQuetiapine Fumarate4914
Bupropion XlBupropion Hcl4715
IrbesartanIrbesartan4611
Albuterol Sulfate HfaAlbuterol Sulfate4327
AlprazolamAlprazolam4316
SynthroidLevothyroxine Sodium4311
LorazepamLorazepam4216
Montelukast SodiumMontelukast Sodium4112
PregabalinPregabalin3711
Warfarin SodiumWarfarin Sodium36suppressed
Cyclobenzaprine HclCyclobenzaprine Hcl3518
Fluoxetine HclFluoxetine Hcl3511
Doxazosin MesylateDoxazosin Mesylate34suppressed
Potassium ChloridePotassium Chloride3311
Lantus SolostarInsulin Glargine,hum.Rec.Anlog3214
Zolpidem TartrateZolpidem Tartrate32suppressed
Pravastatin SodiumPravastatin Sodium3113
Oxybutynin Chloride ErOxybutynin Chloride29suppressed
Diltiazem 24hr Er (Cd)Diltiazem Hcl27suppressed
Triamcinolone AcetonideTriamcinolone Acetonide2517
Amitriptyline HclAmitriptyline Hcl24suppressed
Losartan-HydrochlorothiazideLosartan/Hydrochlorothiazide24suppressed
Propranolol HclPropranolol Hcl24suppressed
JardianceEmpagliflozin23suppressed
MupirocinMupirocin23suppressed
Fluticasone-SalmeterolFluticasone Propion/Salmeterol22suppressed
MounjaroTirzepatide22suppressed
AzithromycinAzithromycin2116
CelecoxibCelecoxib21suppressed
Enalapril MaleateEnalapril Maleate21suppressed
Paroxetine HclParoxetine Hcl20suppressed
PrimidonePrimidone20suppressed
HydrocortisoneHydrocortisone1911
DutasterideDutasteride18suppressed
Hydroxyzine HclHydroxyzine Hcl18suppressed
LamotrigineLamotrigine18suppressed
Acetaminophen-CodeineAcetaminophen With Codeine17suppressed
Candesartan CilexetilCandesartan Cilexetil16suppressed
ClonazepamClonazepam16suppressed
Meclizine HclMeclizine Hcl1611
Ondansetron HclOndansetron Hcl16suppressed
Valsartan-HydrochlorothiazideValsartan/Hydrochlorothiazide16suppressed
Amiodarone HclAmiodarone Hcl15suppressed
Nano 2nd Gen Pen NeedlePen Needle, Diabetic15suppressed
Nitrofurantoin Mono-MacroNitrofurantoin Monohyd/M-Cryst1512
Ropinirole HclRopinirole Hcl15suppressed
Candesartan-HydrochlorothiazidCandesartan/Hydrochlorothiazid14suppressed
CefadroxilCefadroxil1413
GlimepirideGlimepiride14suppressed
JanuviaSitagliptin Phosphate14suppressed
MethylprednisoloneMethylprednisolone1413
TorsemideTorsemide14suppressed
Trelegy ElliptaFluticasone/Umeclidin/Vilanter14suppressed
AmoxicillinAmoxicillin13suppressed
PrednisonePrednisone13suppressed
AtenololAtenolol12suppressed
Breo ElliptaFluticasone/Vilanterol12suppressed
GlipizideGlipizide12suppressed
MetolazoneMetolazone12suppressed
NucyntaTapentadol Hcl12suppressed
NystatinNystatin12suppressed
Ondansetron OdtOndansetron12suppressed
PaxlovidNirmatrelvir/Ritonavir1212
SucralfateSucralfate12suppressed
Sumatriptan SuccinateSumatriptan Succinate12suppressed
Verapamil ErVerapamil Hcl12suppressed
Amoxicillin-Clavulanate PotassAmoxicillin/Potassium Clav11suppressed
GemtesaVibegron11suppressed
Hydrocodone-AcetaminophenHydrocodone/Acetaminophen11suppressed
KetoconazoleKetoconazole11suppressed
Wixela InhubFluticasone Propion/Salmeterol11suppressed
XareltoRivaroxaban11suppressed

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