Healthcare provider profile · identity verified

Donald Gratton Downs, MD.

Family Practice · SIMI VALLEY, CA · NPI 1568451979

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 Calcium31493
Losartan PotassiumLosartan Potassium19655
LisinoprilLisinopril13839
Amlodipine BesylateAmlodipine Besylate13441
Levothyroxine SodiumLevothyroxine Sodium12733
OmeprazoleOmeprazole9931
Rosuvastatin CalciumRosuvastatin Calcium8827
Metoprolol SuccinateMetoprolol Succinate7521
Tramadol HclTramadol Hcl7215
Pantoprazole SodiumPantoprazole Sodium6919
Metoprolol TartrateMetoprolol Tartrate6719
HydrochlorothiazideHydrochlorothiazide6517
Tamsulosin HclTamsulosin Hcl6422
Metformin Hcl ErMetformin Hcl6214
SimvastatinSimvastatin6117
Hydrocodone-AcetaminophenHydrocodone/Acetaminophen5913
AlprazolamAlprazolam5212
Metformin HclMetformin Hcl5117
Escitalopram OxalateEscitalopram Oxalate5017
CarvedilolCarvedilol4915
FurosemideFurosemide4514
ClopidogrelClopidogrel Bisulfate4411
EliquisApixaban44suppressed
Fluticasone-SalmeterolFluticasone Propion/Salmeterol4311
FinasterideFinasteride38suppressed
Losartan-HydrochlorothiazideLosartan/Hydrochlorothiazide38suppressed
AzithromycinAzithromycin3732
GabapentinGabapentin3413
AtenololAtenolol31suppressed
OzempicSemaglutide31suppressed
Hydralazine HclHydralazine Hcl3011
LovastatinLovastatin30suppressed
Fluoxetine HclFluoxetine Hcl29suppressed
Quetiapine FumarateQuetiapine Fumarate29suppressed
Albuterol Sulfate HfaAlbuterol Sulfate27suppressed
Fluticasone PropionateFluticasone Propionate2612
JardianceEmpagliflozin26suppressed
Oxycodone-AcetaminophenOxycodone Hcl/Acetaminophen26suppressed
Potassium ChloridePotassium Chloride26suppressed
Benazepril HclBenazepril Hcl23suppressed
LorazepamLorazepam23suppressed
MeloxicamMeloxicam23suppressed
Spiriva HandihalerTiotropium Bromide23suppressed
Zolpidem TartrateZolpidem Tartrate23suppressed
DiazepamDiazepam21suppressed
Lantus SolostarInsulin Glargine,hum.Rec.Anlog21suppressed
LevetiracetamLevetiracetam21suppressed
TelmisartanTelmisartan21suppressed
Wixela InhubFluticasone Propion/Salmeterol21suppressed
Citalopram HbrCitalopram Hydrobromide20suppressed
Clonidine HclClonidine Hcl20suppressed
Diclofenac SodiumDiclofenac Sodium20suppressed
Duloxetine HclDuloxetine Hcl19suppressed
EzetimibeEzetimibe19suppressed
FamotidineFamotidine19suppressed
SynthroidLevothyroxine Sodium17suppressed
Toujeo SolostarInsulin Glargine,hum.Rec.Anlog17suppressed
Trazodone HclTrazodone Hcl17suppressed
Bupropion Hcl SrBupropion Hcl16suppressed
Flecainide AcetateFlecainide Acetate16suppressed
GlipizideGlipizide16suppressed
Nitrofurantoin Mono-MacroNitrofurantoin Monohyd/M-Cryst1615
Breo ElliptaFluticasone/Vilanterol15suppressed
Enalapril MaleateEnalapril Maleate15suppressed
Pioglitazone HclPioglitazone Hcl15suppressed
Venlafaxine Hcl ErVenlafaxine Hcl15suppressed
Morphine Sulfate ErMorphine Sulfate14suppressed
IbuprofenIbuprofen13suppressed
Meclizine HclMeclizine Hcl13suppressed
Ranolazine ErRanolazine12suppressed
Triamcinolone AcetonideTriamcinolone Acetonide12suppressed
TriazolamTriazolam12suppressed
BaclofenBaclofen11suppressed
Benazepril-HydrochlorothiazideBenazepril/Hydrochlorothiazide11suppressed
Buspirone HclBuspirone Hcl11suppressed
Glipizide ErGlipizide11suppressed
LamotrigineLamotrigine11suppressed
Pravastatin SodiumPravastatin Sodium11suppressed
Sildenafil CitrateSildenafil Citrate11suppressed
Sulfamethoxazole-TrimethoprimSulfamethoxazole/Trimethoprim1111

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