Healthcare provider profile · identity verified

John Alden Weeks, M.D.

Family Practice · CLEARLAKE, CA · NPI 1962473074

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 Calcium36066
Levothyroxine SodiumLevothyroxine Sodium24641
Losartan PotassiumLosartan Potassium22740
Amlodipine BesylateAmlodipine Besylate18836
Metoprolol SuccinateMetoprolol Succinate17432
Metformin HclMetformin Hcl16928
GabapentinGabapentin14728
OmeprazoleOmeprazole13024
CarvedilolCarvedilol12719
Hydrocodone-AcetaminophenHydrocodone/Acetaminophen12716
SimvastatinSimvastatin12520
Albuterol Sulfate HfaAlbuterol Sulfate10528
LisinoprilLisinopril8419
HydrochlorothiazideHydrochlorothiazide7912
GlipizideGlipizide73suppressed
Tamsulosin HclTamsulosin Hcl6714
Potassium ChloridePotassium Chloride6613
SpironolactoneSpironolactone61suppressed
FurosemideFurosemide5914
LorazepamLorazepam58suppressed
AllopurinolAllopurinol5711
Rosuvastatin CalciumRosuvastatin Calcium5612
Pravastatin SodiumPravastatin Sodium5411
EliquisApixaban5111
ClopidogrelClopidogrel Bisulfate5012
SynthroidLevothyroxine Sodium43suppressed
Metoprolol TartrateMetoprolol Tartrate4011
PregabalinPregabalin40suppressed
Montelukast SodiumMontelukast Sodium39suppressed
Pantoprazole SodiumPantoprazole Sodium37suppressed
Trazodone HclTrazodone Hcl37suppressed
Zolpidem TartrateZolpidem Tartrate36suppressed
EzetimibeEzetimibe34suppressed
Fluticasone-SalmeterolFluticasone Propion/Salmeterol34suppressed
Fluticasone PropionateFluticasone Propionate3311
BaclofenBaclofen32suppressed
ValsartanValsartan32suppressed
AtenololAtenolol31suppressed
Hydroxyzine HclHydroxyzine Hcl31suppressed
Liothyronine SodiumLiothyronine Sodium30suppressed
Lantus SolostarInsulin Glargine,hum.Rec.Anlog29suppressed
KetoconazoleKetoconazole27suppressed
CelecoxibCelecoxib26suppressed
TradjentaLinagliptin26suppressed
Triamterene-HydrochlorothiazidTriamterene/Hydrochlorothiazid26suppressed
Verapamil ErVerapamil Hcl26suppressed
Spironolactone-HctzSpironolact/Hydrochlorothiazid23suppressed
Tizanidine HclTizanidine Hcl23suppressed
Ventolin HfaAlbuterol Sulfate22suppressed
Benazepril HclBenazepril Hcl20suppressed
Diltiazem 24hr Er (Cd)Diltiazem Hcl20suppressed
IbuprofenIbuprofen20suppressed
IrbesartanIrbesartan20suppressed
Tramadol HclTramadol Hcl20suppressed
Incruse ElliptaUmeclidinium Bromide19suppressed
Alendronate SodiumAlendronate Sodium18suppressed
Doxazosin MesylateDoxazosin Mesylate18suppressed
LevetiracetamLevetiracetam18suppressed
Acetaminophen-CodeineAcetaminophen With Codeine17suppressed
FinasterideFinasteride17suppressed
Lisinopril-HydrochlorothiazideLisinopril/Hydrochlorothiazide17suppressed
Meclizine HclMeclizine Hcl17suppressed
AlprazolamAlprazolam16suppressed
Diclofenac SodiumDiclofenac Sodium16suppressed
FamotidineFamotidine16suppressed
JanuviaSitagliptin Phosphate16suppressed
RybelsusSemaglutide16suppressed
Basaglar Kwikpen U-100Insulin Glargine,hum.Rec.Anlog15suppressed
Bupropion Hcl SrBupropion Hcl15suppressed
Doxepin HclDoxepin Hcl15suppressed
LamotrigineLamotrigine15suppressed
Nitrofurantoin Mono-MacroNitrofurantoin Monohyd/M-Cryst15suppressed
Trelegy ElliptaFluticasone/Umeclidin/Vilanter15suppressed
Buspirone HclBuspirone Hcl14suppressed
Insulin Lispro Kwikpen U-100Insulin Lispro14suppressed
OzempicSemaglutide14suppressed
Paroxetine HclParoxetine Hcl14suppressed
Pramipexole DihydrochloridePramipexole Di-Hcl14suppressed
Bupropion XlBupropion Hcl13suppressed
FenofibrateFenofibrate Nanocrystallized13suppressed
SymbicortBudesonide/Formoterol Fumarate13suppressed
DiazepamDiazepam12suppressed
DigoxinDigoxin12suppressed
Methadone HclMethadone Hcl12suppressed
Minocycline HclMinocycline Hcl12suppressed
NitroglycerinNitroglycerin12suppressed
Oxycodone-AcetaminophenOxycodone Hcl/Acetaminophen12suppressed
PrednisonePrednisone12suppressed
Ropinirole HclRopinirole Hcl12suppressed
DutasterideDutasteride11suppressed
Isosorbide DinitrateIsosorbide Dinitrate11suppressed
LacosamideLacosamide11suppressed
Sertraline HclSertraline 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