Healthcare provider profile · identity verified

Alexandra L Messerli, MD

Internal Medicine · WILLISTON, VT · NPI 1992142939

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 Calcium32791
Amlodipine BesylateAmlodipine Besylate21055
Levothyroxine SodiumLevothyroxine Sodium19745
EliquisApixaban18355
GabapentinGabapentin15748
Sertraline HclSertraline Hcl15028
OmeprazoleOmeprazole13943
LisinoprilLisinopril11832
Quetiapine FumarateQuetiapine Fumarate10020
Losartan PotassiumLosartan Potassium9821
FinasterideFinasteride9621
FurosemideFurosemide9326
Trazodone HclTrazodone Hcl9329
Tamsulosin HclTamsulosin Hcl9124
SimvastatinSimvastatin8718
Metoprolol SuccinateMetoprolol Succinate8026
Pantoprazole SodiumPantoprazole Sodium7923
Rosuvastatin CalciumRosuvastatin Calcium7824
HydrochlorothiazideHydrochlorothiazide7618
FamotidineFamotidine7414
Escitalopram OxalateEscitalopram Oxalate6114
Alendronate SodiumAlendronate Sodium6016
Olmesartan MedoxomilOlmesartan Medoxomil6017
Metoprolol TartrateMetoprolol Tartrate5820
AtenololAtenolol54suppressed
MirtazapineMirtazapine5018
SpironolactoneSpironolactone5013
TorsemideTorsemide4921
LorazepamLorazepam4830
OzempicSemaglutide48suppressed
Pravastatin SodiumPravastatin Sodium47suppressed
Buspirone HclBuspirone Hcl45suppressed
AllopurinolAllopurinol4413
Diltiazem 24hr Er (Cd)Diltiazem Hcl4312
Metformin HclMetformin Hcl4113
CarvedilolCarvedilol39suppressed
Oxycodone HclOxycodone Hcl3918
CelecoxibCelecoxib3712
Duloxetine HclDuloxetine Hcl35suppressed
PrednisonePrednisone3415
Potassium ChloridePotassium Chloride33suppressed
Fluticasone PropionateFluticasone Propionate3212
JardianceEmpagliflozin32suppressed
ValsartanValsartan32suppressed
Warfarin SodiumWarfarin Sodium32suppressed
Donepezil HclDonepezil Hcl30suppressed
MeloxicamMeloxicam3012
Ropinirole HclRopinirole Hcl29suppressed
Bupropion XlBupropion Hcl28suppressed
Carbidopa-LevodopaCarbidopa/Levodopa28suppressed
ChlorthalidoneChlorthalidone28suppressed
EzetimibeEzetimibe28suppressed
Venlafaxine Hcl ErVenlafaxine Hcl27suppressed
Albuterol Sulfate HfaAlbuterol Sulfate2613
LactuloseLactulose25suppressed
Tramadol HclTramadol Hcl25suppressed
Zolpidem TartrateZolpidem Tartrate25suppressed
Metformin Hcl ErMetformin Hcl24suppressed
Citalopram HbrCitalopram Hydrobromide2311
CephalexinCephalexin2113
ClonazepamClonazepam21suppressed
Memantine HclMemantine Hcl21suppressed
SynthroidLevothyroxine Sodium21suppressed
Nifedipine ErNifedipine20suppressed
Sulfamethoxazole-TrimethoprimSulfamethoxazole/Trimethoprim20suppressed
Trospium ChlorideTrospium Chloride20suppressed
Amiodarone HclAmiodarone Hcl19suppressed
Azelastine HclAzelastine Hcl19suppressed
PregabalinPregabalin1913
Anoro ElliptaUmeclidinium Brm/Vilanterol Tr18suppressed
ClopidogrelClopidogrel Bisulfate18suppressed
Diltiazem 24hr ErDiltiazem Hcl18suppressed
FenofibrateFenofibrate18suppressed
Fluoxetine HclFluoxetine Hcl18suppressed
LovastatinLovastatin18suppressed
Trelegy ElliptaFluticasone/Umeclidin/Vilanter18suppressed
RisperidoneRisperidone17suppressed
Triamterene-HydrochlorothiazidTriamterene/Hydrochlorothiazid17suppressed
BaclofenBaclofen16suppressed
Hydrocodone-AcetaminophenHydrocodone/Acetaminophen16suppressed
Lantus SolostarInsulin Glargine,hum.Rec.Anlog16suppressed
Losartan-HydrochlorothiazideLosartan/Hydrochlorothiazide16suppressed
Pramipexole DihydrochloridePramipexole Di-Hcl16suppressed
SymbicortBudesonide/Formoterol Fumarate16suppressed
Cefpodoxime ProxetilCefpodoxime Proxetil1512
Hydromorphone HclHydromorphone Hcl15suppressed
Memantine Hcl ErMemantine Hcl15suppressed
Montelukast SodiumMontelukast Sodium15suppressed
NystatinNystatin1511
Tizanidine HclTizanidine Hcl15suppressed
Doxycycline HyclateDoxycycline Hyclate14suppressed
Isosorbide Mononitrate ErIsosorbide Mononitrate14suppressed
Amoxicillin-Clavulanate PotassAmoxicillin/Potassium Clav13suppressed
CholestyramineCholestyramine (With Sugar)13suppressed
Diclofenac SodiumDiclofenac Sodium13suppressed
Nitrofurantoin Mono-MacroNitrofurantoin Monohyd/M-Cryst1311
TadalafilTadalafil13suppressed
Triamcinolone AcetonideTriamcinolone Acetonide13suppressed
AcarboseAcarbose12suppressed
Esomeprazole MagnesiumEsomeprazole Magnesium12suppressed
GlipizideGlipizide12suppressed
LipitorAtorvastatin Calcium12suppressed
PaxlovidNirmatrelvir/Ritonavir1212
TelmisartanTelmisartan12suppressed
AcyclovirAcyclovir11suppressed
Arnuity ElliptaFluticasone Furoate11suppressed
Budesonide-Formoterol FumarateBudesonide/Formoterol Fumarate11suppressed
EstradiolEstradiol11suppressed
LamotrigineLamotrigine11suppressed
MethocarbamolMethocarbamol11suppressed
Venlafaxine HclVenlafaxine Hcl11suppressed

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