Healthcare provider profile · identity verified

Mark Obermyer, MD

Pediatric Medicine · BROOKFIELD, WI · NPI 1669634820

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 Calcium544160
Losartan PotassiumLosartan Potassium26278
Levothyroxine SodiumLevothyroxine Sodium23767
Amlodipine BesylateAmlodipine Besylate20161
LisinoprilLisinopril19057
SimvastatinSimvastatin17345
HydrochlorothiazideHydrochlorothiazide14445
Metformin HclMetformin Hcl13842
OmeprazoleOmeprazole13845
Rosuvastatin CalciumRosuvastatin Calcium11635
Tamsulosin HclTamsulosin Hcl10731
Metoprolol SuccinateMetoprolol Succinate8125
Escitalopram OxalateEscitalopram Oxalate8021
Pravastatin SodiumPravastatin Sodium7727
Sertraline HclSertraline Hcl7620
AllopurinolAllopurinol6418
FurosemideFurosemide6117
Metformin Hcl ErMetformin Hcl5519
EliquisApixaban5418
Pantoprazole SodiumPantoprazole Sodium5418
Alendronate SodiumAlendronate Sodium5215
GabapentinGabapentin4719
Montelukast SodiumMontelukast Sodium4613
Lisinopril-HydrochlorothiazideLisinopril/Hydrochlorothiazide4413
Warfarin SodiumWarfarin Sodium4312
LorazepamLorazepam38suppressed
Metoprolol TartrateMetoprolol Tartrate3812
Trazodone HclTrazodone Hcl34suppressed
Albuterol Sulfate HfaAlbuterol Sulfate3214
Losartan-HydrochlorothiazideLosartan/Hydrochlorothiazide32suppressed
PregabalinPregabalin32suppressed
CelecoxibCelecoxib31suppressed
FinasterideFinasteride30suppressed
Oxybutynin ChlorideOxybutynin Chloride29suppressed
JardianceEmpagliflozin27suppressed
Donepezil HclDonepezil Hcl25suppressed
Isosorbide Mononitrate ErIsosorbide Mononitrate25suppressed
Hydralazine HclHydralazine Hcl24suppressed
Fluoxetine HclFluoxetine Hcl23suppressed
SpironolactoneSpironolactone23suppressed
Citalopram HbrCitalopram Hydrobromide22suppressed
GlimepirideGlimepiride22suppressed
Hydrocodone-AcetaminophenHydrocodone/Acetaminophen22suppressed
Doxazosin MesylateDoxazosin Mesylate20suppressed
Fluticasone PropionateFluticasone Propionate2011
Duloxetine HclDuloxetine Hcl19suppressed
Oxycodone HclOxycodone Hcl19suppressed
Zolpidem TartrateZolpidem Tartrate19suppressed
AtenololAtenolol18suppressed
SynthroidLevothyroxine Sodium18suppressed
Tizanidine HclTizanidine Hcl18suppressed
Cyclobenzaprine HclCyclobenzaprine Hcl17suppressed
GlipizideGlipizide17suppressed
LovastatinLovastatin17suppressed
Glipizide ErGlipizide16suppressed
Propranolol HclPropranolol Hcl15suppressed
Propranolol Hcl ErPropranolol Hcl15suppressed
TrulicityDulaglutide15suppressed
Tramadol HclTramadol Hcl14suppressed
Venlafaxine Hcl ErVenlafaxine Hcl14suppressed
Bupropion XlBupropion Hcl13suppressed
Diltiazem 24hr Er (Cd)Diltiazem Hcl13suppressed
FamotidineFamotidine13suppressed
IrbesartanIrbesartan13suppressed
JanuviaSitagliptin Phosphate13suppressed
Ventolin HfaAlbuterol Sulfate13suppressed
BaclofenBaclofen12suppressed
EzetimibeEzetimibe12suppressed
Quetiapine FumarateQuetiapine Fumarate12suppressed
Trelegy ElliptaFluticasone/Umeclidin/Vilanter12suppressed
ClonazepamClonazepam11suppressed
ClopidogrelClopidogrel Bisulfate11suppressed
Esomeprazole MagnesiumEsomeprazole Magnesium11suppressed
FenofibrateFenofibrate Nanocrystallized11suppressed
Sildenafil CitrateSildenafil Citrate11suppressed
ValsartanValsartan11suppressed

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