Healthcare provider profile · identity verified

Daniel R Massarelli, M.D.

Internal Medicine · WORCESTER, MA · NPI 1467435131

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 Calcium775217
Amlodipine BesylateAmlodipine Besylate491147
LisinoprilLisinopril478142
Losartan PotassiumLosartan Potassium30695
HydrochlorothiazideHydrochlorothiazide27479
OmeprazoleOmeprazole25186
Levothyroxine SodiumLevothyroxine Sodium24466
Metoprolol SuccinateMetoprolol Succinate22570
LorazepamLorazepam20464
Rosuvastatin CalciumRosuvastatin Calcium20168
Tamsulosin HclTamsulosin Hcl15453
Sertraline HclSertraline Hcl15244
Metformin HclMetformin Hcl13541
SimvastatinSimvastatin13338
Pantoprazole SodiumPantoprazole Sodium11843
EliquisApixaban11338
FamotidineFamotidine11140
Albuterol Sulfate HfaAlbuterol Sulfate10838
AllopurinolAllopurinol10030
FurosemideFurosemide8937
Tramadol HclTramadol Hcl8324
AtenololAtenolol8222
Lisinopril-HydrochlorothiazideLisinopril/Hydrochlorothiazide8023
Metformin Hcl ErMetformin Hcl8028
IbuprofenIbuprofen7923
SynthroidLevothyroxine Sodium7617
Fluticasone PropionateFluticasone Propionate7430
Olmesartan MedoxomilOlmesartan Medoxomil7020
FinasterideFinasteride6417
Trazodone HclTrazodone Hcl6019
GabapentinGabapentin5725
Potassium ChloridePotassium Chloride5520
Escitalopram OxalateEscitalopram Oxalate5221
Citalopram HbrCitalopram Hydrobromide5017
ClonazepamClonazepam5016
Losartan-HydrochlorothiazideLosartan/Hydrochlorothiazide5014
Diltiazem 24hr Er (Cd)Diltiazem Hcl4915
DiazepamDiazepam4813
Metoprolol TartrateMetoprolol Tartrate4713
RamiprilRamipril4412
AlprazolamAlprazolam4212
Nitrofurantoin Mono-MacroNitrofurantoin Monohyd/M-Cryst4228
MirtazapineMirtazapine4111
Fluoxetine HclFluoxetine Hcl40suppressed
PrednisonePrednisone3925
GlimepirideGlimepiride3711
CarvedilolCarvedilol3613
Oxycodone-AcetaminophenOxycodone Hcl/Acetaminophen36suppressed
Zolpidem TartrateZolpidem Tartrate3612
Duloxetine HclDuloxetine Hcl31suppressed
AmoxicillinAmoxicillin3023
ChlorthalidoneChlorthalidone29suppressed
Bupropion XlBupropion Hcl27suppressed
Oxybutynin Chloride ErOxybutynin Chloride27suppressed
Warfarin SodiumWarfarin Sodium27suppressed
Paroxetine HclParoxetine Hcl25suppressed
Wixela InhubFluticasone Propion/Salmeterol25suppressed
Cyclobenzaprine HclCyclobenzaprine Hcl2413
Pravastatin SodiumPravastatin Sodium24suppressed
Hydrocodone-AcetaminophenHydrocodone/Acetaminophen23suppressed
Klor-Con M10Potassium Chloride2311
Labetalol HclLabetalol Hcl23suppressed
Meclizine HclMeclizine Hcl2213
TemazepamTemazepam22suppressed
CelecoxibCelecoxib21suppressed
JardianceEmpagliflozin21suppressed
Diclofenac SodiumDiclofenac Sodium20suppressed
Montelukast SodiumMontelukast Sodium20suppressed
Valsartan-HydrochlorothiazideValsartan/Hydrochlorothiazide20suppressed
FluocinonideFluocinonide1913
Ipratropium BromideIpratropium Bromide19suppressed
NitroglycerinNitroglycerin19suppressed
XareltoRivaroxaban19suppressed
Donepezil HclDonepezil Hcl18suppressed
Esomeprazole MagnesiumEsomeprazole Magnesium18suppressed
EzetimibeEzetimibe17suppressed
SpironolactoneSpironolactone16suppressed
Amitriptyline HclAmitriptyline Hcl15suppressed
Dexlansoprazole DrDexlansoprazole15suppressed
MounjaroTirzepatide15suppressed
ValacyclovirValacyclovir Hcl15suppressed
ValsartanValsartan15suppressed
Alfuzosin Hcl ErAlfuzosin Hcl14suppressed
CiclopiroxCiclopirox Olamine14suppressed
MetronidazoleMetronidazole14suppressed
MupirocinMupirocin1411
Amlodipine Besylate-BenazeprilAmlodipine Besylate/Benazepril13suppressed
Cefpodoxime ProxetilCefpodoxime Proxetil1312
Doxazosin MesylateDoxazosin Mesylate13suppressed
Doxycycline MonohydrateDoxycycline Monohydrate1312
Sulfamethoxazole-TrimethoprimSulfamethoxazole/Trimethoprim1312
Alendronate SodiumAlendronate Sodium12suppressed
Isosorbide Mononitrate ErIsosorbide Mononitrate12suppressed
LidocaineLidocaine12suppressed
Oxycodone HclOxycodone Hcl12suppressed
ClonidineClonidine11suppressed
FenofibrateFenofibrate11suppressed
KetoconazoleKetoconazole11suppressed
Ondansetron OdtOndansetron11suppressed
Oxybutynin ChlorideOxybutynin Chloride11suppressed
PregabalinPregabalin11suppressed
Propranolol Hcl ErPropranolol Hcl11suppressed
ZolmitriptanZolmitriptan11suppressed

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