Healthcare provider profile · identity verified

Michael Brandon Marcus, MD

Psychiatry · LANCASTER, CA · NPI 1316380306

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
Hydroxyzine HclHydroxyzine Hcl21936
Quetiapine FumarateQuetiapine Fumarate19320
Trazodone HclTrazodone Hcl15919
Sertraline HclSertraline Hcl15715
OlanzapineOlanzapine11512
Buspirone HclBuspirone Hcl10815
Prazosin HclPrazosin Hcl10616
Benztropine MesylateBenztropine Mesylate10013
RisperidoneRisperidone9314
Bupropion XlBupropion Hcl88suppressed
AripiprazoleAripiprazole7113
GabapentinGabapentin7115
Fluoxetine HclFluoxetine Hcl69suppressed
Escitalopram OxalateEscitalopram Oxalate68suppressed
Lurasidone HclLurasidone Hcl59suppressed
Hydroxyzine PamoateHydroxyzine Pamoate47suppressed
ClozapineClozapine45suppressed
Clomipramine HclClomipramine Hcl41suppressed
Duloxetine HclDuloxetine Hcl39suppressed
Olanzapine OdtOlanzapine39suppressed
MirtazapineMirtazapine37suppressed
Citalopram HbrCitalopram Hydrobromide35suppressed
Venlafaxine Hcl ErVenlafaxine Hcl35suppressed
Lithium CarbonateLithium Carbonate27suppressed
Quetiapine Fumarate ErQuetiapine Fumarate25suppressed
Divalproex Sodium ErDivalproex Sodium24suppressed
RamelteonRamelteon24suppressed
OxcarbazepineOxcarbazepine23suppressed
Amitriptyline HclAmitriptyline Hcl21suppressed
LamotrigineLamotrigine14suppressed
Methylphenidate HclMethylphenidate Hcl14suppressed
Nortriptyline HclNortriptyline Hcl14suppressed
Paroxetine HclParoxetine Hcl14suppressed
Atropine SulfateAtropine Sulfate13suppressed
Fluphenazine HclFluphenazine Hcl13suppressed
Doxepin HclDoxepin Hcl12suppressed
Fluvoxamine MaleateFluvoxamine Maleate12suppressed
ThiothixeneThiothixene12suppressed
CarbamazepineCarbamazepine11suppressed
Propranolol HclPropranolol 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