Healthcare provider profile · identity verified

Thomas A Hays, MD

Psychiatry & Neurology · BUFFALO, NY · NPI 1497778799

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
RisperidoneRisperidone59658
OlanzapineOlanzapine39432
Quetiapine FumarateQuetiapine Fumarate34528
Divalproex SodiumDivalproex Sodium26127
AripiprazoleAripiprazole24726
Divalproex Sodium ErDivalproex Sodium23824
Sertraline HclSertraline Hcl23020
Buspirone HclBuspirone Hcl22720
Propranolol HclPropranolol Hcl19215
HaloperidolHaloperidol18617
LorazepamLorazepam18315
Benztropine MesylateBenztropine Mesylate16719
Escitalopram OxalateEscitalopram Oxalate14316
Fluoxetine HclFluoxetine Hcl13014
Paroxetine HclParoxetine Hcl118suppressed
TopiramateTopiramate111suppressed
Trazodone HclTrazodone Hcl10412
Chlorpromazine HclChlorpromazine Hcl100suppressed
Citalopram HbrCitalopram Hydrobromide94suppressed
Lurasidone HclLurasidone Hcl71suppressed
ClonazepamClonazepam70suppressed
MirtazapineMirtazapine66suppressed
GabapentinGabapentin61suppressed
ClozapineClozapine55suppressed
LamotrigineLamotrigine52suppressed
Ziprasidone HclZiprasidone Hcl51suppressed
Lithium CarbonateLithium Carbonate49suppressed
Fluvoxamine MaleateFluvoxamine Maleate46suppressed
Carbamazepine ErCarbamazepine30suppressed
OxcarbazepineOxcarbazepine30suppressed
CarbamazepineCarbamazepine27suppressed
FanaptIloperidone24suppressed
Quetiapine Fumarate ErQuetiapine Fumarate24suppressed
PerphenazinePerphenazine22suppressed
Risperdal ConstaRisperidone Microspheres19suppressed
Lithium Carbonate ErLithium Carbonate16suppressed
Naltrexone HclNaltrexone Hcl16suppressed
Fluphenazine HclFluphenazine Hcl14suppressed
Guanfacine HclGuanfacine Hcl14suppressed
Risperidone OdtRisperidone14suppressed
Trihexyphenidyl HclTrihexyphenidyl Hcl14suppressed
Duloxetine HclDuloxetine Hcl13suppressed
LoxapineLoxapine Succinate13suppressed
PindololPindolol13suppressed
Ropinirole HclRopinirole Hcl13suppressed
VraylarCariprazine Hcl13suppressed
Bupropion Hcl SrBupropion Hcl12suppressed
Clomipramine HclClomipramine Hcl12suppressed
LexaproEscitalopram Oxalate12suppressed
RisperdalRisperidone12suppressed
Valproic AcidValproic Acid11suppressed
Valproic AcidValproic Acid (As Sodium Salt)11suppressed
Venlafaxine HclVenlafaxine Hcl11suppressed
Zolpidem TartrateZolpidem Tartrate11suppressed

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