Healthcare provider profile · identity verified

Robert E. Marshall, MD

Internal Medicine · SOUTH SAN FRANCISCO, CA · NPI 1801960117

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 Calcium703231
Losartan PotassiumLosartan Potassium431142
Amlodipine BesylateAmlodipine Besylate26397
Tamsulosin HclTamsulosin Hcl26292
AtenololAtenolol24876
Levothyroxine SodiumLevothyroxine Sodium24269
HydrochlorothiazideHydrochlorothiazide23881
Hydrocodone-AcetaminophenHydrocodone/Acetaminophen22447
Albuterol Sulfate HfaAlbuterol Sulfate22393
Fluticasone PropionateFluticasone Propionate19168
Metformin Hcl ErMetformin Hcl18666
AllopurinolAllopurinol18563
LorazepamLorazepam17735
Losartan-HydrochlorothiazideLosartan/Hydrochlorothiazide17659
OmeprazoleOmeprazole16763
SimvastatinSimvastatin15046
Metoprolol TartrateMetoprolol Tartrate14143
LisinoprilLisinopril13148
FurosemideFurosemide12250
Pantoprazole SodiumPantoprazole Sodium11040
Lisinopril-HydrochlorothiazideLisinopril/Hydrochlorothiazide10837
FamotidineFamotidine9340
Metoprolol SuccinateMetoprolol Succinate9233
Alendronate SodiumAlendronate Sodium9132
FinasterideFinasteride8626
Metformin HclMetformin Hcl8432
LovastatinLovastatin7825
GabapentinGabapentin7639
AlvescoCiclesonide7129
Trazodone HclTrazodone Hcl6924
Doxycycline MonohydrateDoxycycline Monohydrate6649
GlipizideGlipizide6623
PrednisonePrednisone6450
PradaxaDabigatran Etexilate Mesylate6323
CephalexinCephalexin6250
Montelukast SodiumMontelukast Sodium5819
FluocinonideFluocinonide5634
ColchicineColchicine4925
AzithromycinAzithromycin4841
MirtazapineMirtazapine4818
Triamcinolone AcetonideTriamcinolone Acetonide4824
Acetaminophen-CodeineAcetaminophen With Codeine4713
Wixela InhubFluticasone Propion/Salmeterol4622
CarvedilolCarvedilol4413
OzempicSemaglutide37suppressed
IbuprofenIbuprofen3619
Potassium ChloridePotassium Chloride3615
Tramadol HclTramadol Hcl3417
Fluoxetine HclFluoxetine Hcl3314
AlprazolamAlprazolam32suppressed
Terazosin HclTerazosin Hcl3212
Ropinirole HclRopinirole Hcl30suppressed
Spiriva RespimatTiotropium Bromide30suppressed
ClopidogrelClopidogrel Bisulfate28suppressed
Pravastatin SodiumPravastatin Sodium26suppressed
Promethazine HclPromethazine Hcl25suppressed
BaclofenBaclofen24suppressed
Morphine Sulfate ErMorphine Sulfate24suppressed
Ondansetron OdtOndansetron23suppressed
Sertraline HclSertraline Hcl2313
Hydralazine HclHydralazine Hcl22suppressed
Ondansetron HclOndansetron Hcl2211
Duloxetine HclDuloxetine Hcl21suppressed
Adacel TdapDiph,pertuss(Acell),tet Vac/Pf2020
ClonazepamClonazepam20suppressed
DigoxinDigoxin20suppressed
Warfarin SodiumWarfarin Sodium20suppressed
Glipizide ErGlipizide19suppressed
Humulin NInsulin Nph Human Isophane19suppressed
JardianceEmpagliflozin19suppressed
Nortriptyline HclNortriptyline Hcl19suppressed
AmoxicillinAmoxicillin1815
SpironolactoneSpironolactone18suppressed
Amoxicillin-Clavulanate PotassAmoxicillin/Potassium Clav1715
Isosorbide Mononitrate ErIsosorbide Mononitrate17suppressed
ItraconazoleItraconazole17suppressed
Paroxetine HclParoxetine Hcl17suppressed
Cefpodoxime ProxetilCefpodoxime Proxetil16suppressed
Ibandronate SodiumIbandronate Sodium16suppressed
Rosuvastatin CalciumRosuvastatin Calcium16suppressed
TemazepamTemazepam16suppressed
Trospium ChlorideTrospium Chloride16suppressed
Varenicline TartrateVarenicline Tartrate16suppressed
Veo Insulin SyringeSyringe-Needle,insulin,0.5 Ml16suppressed
Betamethasone Diprop AugmentedBetamethasone/Propylene Glyc15suppressed
BreynaBudesonide/Formoterol Fumarate15suppressed
Bupropion XlBupropion Hcl14suppressed
CelecoxibCelecoxib14suppressed
Dantrolene SodiumDantrolene Sodium14suppressed
Neomycin-Polymyxin-DexamethNeomycin/Polymyxin B/Dexametha14suppressed
NystatinNystatin14suppressed
Oxycodone-AcetaminophenOxycodone Hcl/Acetaminophen14suppressed
AcyclovirAcyclovir13suppressed
Alclometasone DipropionateAlclometasone Dipropionate1312
Dicyclomine HclDicyclomine Hcl13suppressed
FluconazoleFluconazole13suppressed
MetronidazoleMetronidazole13suppressed
Advair HfaFluticasone Propion/Salmeterol12suppressed
Quetiapine FumarateQuetiapine Fumarate12suppressed
Hydroxyzine HclHydroxyzine Hcl11suppressed
LatanoprostLatanoprost11suppressed
Nitrofurantoin Mono-MacroNitrofurantoin Monohyd/M-Cryst11suppressed
Propranolol HclPropranolol Hcl11suppressed
ScopolamineScopolamine11suppressed
Tizanidine HclTizanidine 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