Healthcare provider profile · identity verified

Andrew Robert Larson, MD MPH

Internal Medicine · FLAGSTAFF, AZ · NPI 1336407774

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 Calcium31194
Losartan PotassiumLosartan Potassium25377
Amlodipine BesylateAmlodipine Besylate22470
LisinoprilLisinopril22466
Rosuvastatin CalciumRosuvastatin Calcium15651
Tamsulosin HclTamsulosin Hcl14347
OmeprazoleOmeprazole13240
Metoprolol SuccinateMetoprolol Succinate12337
Levothyroxine SodiumLevothyroxine Sodium12235
JardianceEmpagliflozin11732
Metformin HclMetformin Hcl11433
Sertraline HclSertraline Hcl11339
GabapentinGabapentin10338
Albuterol Sulfate HfaAlbuterol Sulfate9232
Hydrocodone-AcetaminophenHydrocodone/Acetaminophen8417
Pravastatin SodiumPravastatin Sodium8422
AllopurinolAllopurinol8225
HydrochlorothiazideHydrochlorothiazide8024
FamotidineFamotidine7226
EliquisApixaban6822
SimvastatinSimvastatin6622
Montelukast SodiumMontelukast Sodium6221
MounjaroTirzepatide5814
Pantoprazole SodiumPantoprazole Sodium5714
Trazodone HclTrazodone Hcl5522
FurosemideFurosemide5421
Metformin Hcl ErMetformin Hcl4915
AtenololAtenolol4714
MethocarbamolMethocarbamol4619
AbrysvoRsv Vacc, Pref A And Pref B/Pf4545
Lisinopril-HydrochlorothiazideLisinopril/Hydrochlorothiazide4415
Fluticasone PropionateFluticasone Propionate4222
Metoprolol TartrateMetoprolol Tartrate4011
Tramadol HclTramadol Hcl3911
MeloxicamMeloxicam3820
Losartan-HydrochlorothiazideLosartan/Hydrochlorothiazide36suppressed
FinasterideFinasteride3411
OzempicSemaglutide33suppressed
Duloxetine HclDuloxetine Hcl31suppressed
Lantus SolostarInsulin Glargine,hum.Rec.Anlog3111
PregabalinPregabalin3013
Bupropion XlBupropion Hcl2916
EzetimibeEzetimibe2911
MethylprednisoloneMethylprednisolone2827
GlipizideGlipizide27suppressed
PrednisonePrednisone2722
SpironolactoneSpironolactone27suppressed
Diclofenac SodiumDiclofenac Sodium2511
Donepezil HclDonepezil Hcl24suppressed
Warfarin SodiumWarfarin Sodium24suppressed
Amoxicillin-Clavulanate PotassAmoxicillin/Potassium Clav2322
NaproxenNaproxen2314
AzithromycinAzithromycin2221
CarvedilolCarvedilol22suppressed
Escitalopram OxalateEscitalopram Oxalate22suppressed
Triamterene-HydrochlorothiazidTriamterene/Hydrochlorothiazid20suppressed
Zolpidem TartrateZolpidem Tartrate20suppressed
Pramipexole DihydrochloridePramipexole Di-Hcl18suppressed
Nifedipine ErNifedipine16suppressed
CephalexinCephalexin1515
Cyclobenzaprine HclCyclobenzaprine Hcl15suppressed
Oxycodone-AcetaminophenOxycodone Hcl/Acetaminophen15suppressed
AmoxicillinAmoxicillin14suppressed
Oxybutynin Chloride ErOxybutynin Chloride14suppressed
Spiriva RespimatTiotropium Bromide14suppressed
AlprazolamAlprazolam13suppressed
Budesonide-Formoterol FumarateBudesonide/Formoterol Fumarate13suppressed
Nitrofurantoin Mono-MacroNitrofurantoin Monohyd/M-Cryst1313
ValacyclovirValacyclovir Hcl13suppressed
Paroxetine HclParoxetine Hcl12suppressed
PrimidonePrimidone12suppressed
Triamcinolone AcetonideTriamcinolone Acetonide1211
Advair HfaFluticasone Propion/Salmeterol11suppressed
LorazepamLorazepam11suppressed

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