Healthcare provider profile · identity verified

John P Thalken, MD

Internal Medicine · DOUGLAS, WY · NPI 1912007212

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
FurosemideFurosemide18720
Levothyroxine SodiumLevothyroxine Sodium13940
Potassium ChloridePotassium Chloride10518
EliquisApixaban9714
Atorvastatin CalciumAtorvastatin Calcium9023
LisinoprilLisinopril8420
GabapentinGabapentin72suppressed
Rosuvastatin CalciumRosuvastatin Calcium6930
OmeprazoleOmeprazole6814
Pantoprazole SodiumPantoprazole Sodium6519
AllopurinolAllopurinol55suppressed
Quetiapine FumarateQuetiapine Fumarate51suppressed
Metoprolol SuccinateMetoprolol Succinate48suppressed
Metoprolol TartrateMetoprolol Tartrate45suppressed
SpironolactoneSpironolactone41suppressed
EntrestoSacubitril/Valsartan38suppressed
Tramadol HclTramadol Hcl33suppressed
Warfarin SodiumWarfarin Sodium32suppressed
Amlodipine BesylateAmlodipine Besylate28suppressed
ChlorthalidoneChlorthalidone25suppressed
Escitalopram OxalateEscitalopram Oxalate25suppressed
Duloxetine HclDuloxetine Hcl24suppressed
Sertraline HclSertraline Hcl24suppressed
Synjardy XrEmpagliflozin/Metformin Hcl24suppressed
NitrofurantoinNitrofurantoin Macrocrystal22suppressed
Oseltamivir PhosphateOseltamivir Phosphate2218
Ropinirole HclRopinirole Hcl22suppressed
Venlafaxine Hcl ErVenlafaxine Hcl22suppressed
AripiprazoleAripiprazole21suppressed
Hydroxyzine HclHydroxyzine Hcl21suppressed
SimvastatinSimvastatin21suppressed
Trazodone HclTrazodone Hcl19suppressed
ClopidogrelClopidogrel Bisulfate18suppressed
FamotidineFamotidine18suppressed
Tizanidine HclTizanidine Hcl18suppressed
Losartan PotassiumLosartan Potassium17suppressed
Montelukast SodiumMontelukast Sodium17suppressed
TrimethoprimTrimethoprim17suppressed
MirtazapineMirtazapine16suppressed
Albuterol SulfateAlbuterol Sulfate15suppressed
AtenololAtenolol14suppressed
LevetiracetamLevetiracetam14suppressed
Pravastatin SodiumPravastatin Sodium14suppressed
FarxigaDapagliflozin Propanediol13suppressed
Imipramine HclImipramine Hcl13suppressed
LorazepamLorazepam13suppressed
Oxybutynin ChlorideOxybutynin Chloride13suppressed
Carbidopa-LevodopaCarbidopa/Levodopa12suppressed
Desvenlafaxine Succinate ErDesvenlafaxine Succinate12suppressed
Novofine AutocoverPen Needle, Diabetic, Safety12suppressed
Olmesartan MedoxomilOlmesartan Medoxomil12suppressed
Sulfamethoxazole-TrimethoprimSulfamethoxazole/Trimethoprim12suppressed
Morphine SulfateMorphine Sulfate11suppressed
Tamsulosin HclTamsulosin 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