Healthcare provider profile · identity verified

Gagandeep Singh, MD

Allopathic & Osteopathic Physicians|Internal Medicine · HARTFORD, CT · NPI 1003055021

Profile state: payments and partd 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

CMS Open Payments records show Gagandeep Singh, MD received $335.74 in general payments during 2025 across 14 reported records.

PFIZER INC. accounted for 49.6% of that reported general-payment amount.

The Open Payments records used for this analysis explicitly named 8 associated products.

A separate comparison found the same explicitly named product in public Medicare Part D data: Eliquis, Ingrezza, Xifaxan.

Neurocrine BioSciences, Inc. reported payments to this doctor in 2025. Across the 2025 Open Payments General Payment records loaded for this analysis, that same reporting entity reported INGREZZA as an associated drug or biological on 126456 records involving 27390 distinct recipient NPIs. Public Medicare Part D data also shows 35 claims for Ingrezza by this doctor in 2024.

PFIZER INC. reported payments to this doctor in 2025. Across the 2025 Open Payments General Payment records loaded for this analysis, that same reporting entity reported ELIQUIS as an associated drug or biological on 87112 records involving 36032 distinct recipient NPIs. Public Medicare Part D data also shows 979 claims for Eliquis by this doctor in 2024.

Salix Pharmaceuticals, a division of Bausch Health US, LLC reported payments to this doctor in 2025. Across the 2025 Open Payments General Payment records loaded for this analysis, that same reporting entity reported XIFAXAN as an associated drug or biological on 101901 records involving 33018 distinct recipient NPIs. Public Medicare Part D data also shows 22 claims for Xifaxan by this doctor in 2024.

These records do not establish that a payment influenced prescribing or medical care.

Payment overview · 2025

General Payments

$335.74

14 reported records · 6 companies

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.

Who paid this doctor?

Companies in 2025 General Payments

Reported companyCanonical companyAmountShareRecordsYear
PFIZER INC. Unresolved — no canonical attribution shown $166.7049.6%72025
Salix Pharmaceuticals, a division of Bausch Health US, LLC Unresolved — no canonical attribution shown $73.3821.9%32025
Alnylam Pharmaceuticals Inc. Unresolved — no canonical attribution shown $36.6010.9%12025
Neurocrine BioSciences, Inc. Unresolved — no canonical attribution shown $21.436.4%12025
Alexion Pharmaceuticals, Inc. Unresolved — no canonical attribution shown $20.816.2%12025
ZOLL Services LLC (A/K/A ZOLL LifeCor Corp) Unresolved — no canonical attribution shown $16.825.0%12025

What were the payments for?

Payment categories

CategoryAmountRecords
Food and Beverage$335.7414

A meal, consulting fee, royalty, and travel payment describe different kinds of reported relationships and should not be interpreted as equivalent.

Analysis 1 · Payment-linked products

Products named in Open Payments records

Reported productTypeReported companyRelated amount*RecordsYear
ELIQUIS
Normalized: eliquis
Drug PFIZER INC. $117.67 5 2025
Source payment records
PAXLOVID
Normalized: paxlovid
Drug PFIZER INC. $117.67 5 2025
Source payment records
NURTEC ODT
Normalized: nurtec odt
Drug PFIZER INC. $95.59 4 2025
Source payment records
XIFAXAN
Normalized: xifaxan
Drug Salix Pharmaceuticals, a division of Bausch Health US, LLC $73.38 3 2025
Source payment records
  • 2025-01-03 · Salix Pharmaceuticals, a division of Bausch Health US, LLC · $24.98 · Open Payments source
  • 2025-03-17 · Salix Pharmaceuticals, a division of Bausch Health US, LLC · $23.42 · Open Payments source
  • 2025-04-22 · Salix Pharmaceuticals, a division of Bausch Health US, LLC · $24.98 · Open Payments source
VYNDAQEL
Normalized: vyndaqel
Drug PFIZER INC. $49.03 2 2025
Source payment records
INGREZZA
Normalized: ingrezza
Drug Neurocrine BioSciences, Inc. $21.43 1 2025
Source payment records
ULTOMIRIS
Normalized: ultomiris
Biological Alexion Pharmaceuticals, Inc. $20.81 1 2025
Source payment records
LifeVest
Normalized: lifevest
Device ZOLL Services LLC (A/K/A ZOLL LifeCor Corp) $16.82 1 2025
Source payment records

* Product-associated amounts are non-additive because one payment record may name more than one product.

These products were named on specific Open Payments records. A named product does not show that the payment influenced treatment or prescribing.

Public prescribing for products named in payments

Open Payments productPayment yearPart D brandPart D yearClaimsMatch methodSource
ELIQUIS
eliquis
2025 Eliquis 2024 979 exact normalized Medicare Part D
INGREZZA
ingrezza
2025 Ingrezza 2024 35
Beneficiary count suppressed
exact normalized Medicare Part D
XIFAXAN
xifaxan
2025 Xifaxan 2024 22
Beneficiary count suppressed
exact normalized Medicare Part D

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.

Paying companyPayment yearDrug reported by same entityOpen Payments evidencePart DClaimsBeneficiaries
Neurocrine BioSciences, Inc.
Exact reporting entity; no affiliate inference
2025 INGREZZA
open payments reported associated product
CMS Open Payments — General Payments
126456 supporting records · 27390 recipient NPIs · example record 1242766729
Ingrezza · 2024
Exact normalized brand match · 1 Part D row
35 suppressed by CMS
PFIZER INC.
Exact reporting entity; no affiliate inference
2025 ELIQUIS
open payments reported associated product
CMS Open Payments — General Payments
87112 supporting records · 36032 recipient NPIs · example record 1228794063
Eliquis · 2024
Exact normalized brand match · 1 Part D row
979 114
Salix Pharmaceuticals, a division of Bausch Health US, LLC
Exact reporting entity; no affiliate inference
2025 XIFAXAN
open payments reported associated product
CMS Open Payments — General Payments
101901 supporting records · 33018 recipient NPIs · example record 1231775337
Xifaxan · 2024
Exact normalized brand match · 1 Part D row
22 suppressed by CMS

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 Calcium1481224
EliquisApixaban979114
Trazodone HclTrazodone Hcl901145
Amlodipine BesylateAmlodipine Besylate765128
Levothyroxine SodiumLevothyroxine Sodium63788
GabapentinGabapentin611106
FurosemideFurosemide59386
OmeprazoleOmeprazole56479
Metoprolol SuccinateMetoprolol Succinate51777
LisinoprilLisinopril47865
Tamsulosin HclTamsulosin Hcl41062
Sertraline HclSertraline Hcl40659
Metformin HclMetformin Hcl38753
MirtazapineMirtazapine37964
Pantoprazole SodiumPantoprazole Sodium35184
RisperidoneRisperidone33636
Losartan PotassiumLosartan Potassium32152
Metoprolol TartrateMetoprolol Tartrate30760
Potassium ChloridePotassium Chloride29750
Divalproex SodiumDivalproex Sodium28536
Escitalopram OxalateEscitalopram Oxalate25944
ClozapineClozapine25717
Quetiapine FumarateQuetiapine Fumarate25031
Duloxetine HclDuloxetine Hcl24937
TradjentaLinagliptin22413
LevetiracetamLevetiracetam21629
OlanzapineOlanzapine20631
AripiprazoleAripiprazole19824
FamotidineFamotidine19031
JanuviaSitagliptin Phosphate18822
LamotrigineLamotrigine18611
TorsemideTorsemide18426
Divalproex Sodium ErDivalproex Sodium17414
XareltoRivaroxaban17120
Warfarin SodiumWarfarin Sodium165suppressed
PrednisonePrednisone15462
AllopurinolAllopurinol15223
Breo ElliptaFluticasone/Vilanterol15219
CarvedilolCarvedilol15030
Donepezil HclDonepezil Hcl14525
Hydralazine HclHydralazine Hcl13512
Buspirone HclBuspirone Hcl13421
ClopidogrelClopidogrel Bisulfate12820
JardianceEmpagliflozin12823
Venlafaxine Hcl ErVenlafaxine Hcl12811
Ipratropium-AlbuterolIpratropium/Albuterol Sulfate12768
HydrochlorothiazideHydrochlorothiazide12414
FinasterideFinasteride12021
EnuloseLactulose11713
Benztropine MesylateBenztropine Mesylate11418
Atropine SulfateAtropine Sulfate10719
HaloperidolHaloperidol106suppressed
LactuloseLactulose10624
LatanoprostLatanoprost10425
Lurasidone HclLurasidone Hcl104suppressed
LantusInsulin Glargine,hum.Rec.Anlog10227
BaclofenBaclofen10019
MyrbetriqMirabegron97suppressed
Hydroxyzine HclHydroxyzine Hcl9619
Ondansetron HclOndansetron Hcl9541
SimvastatinSimvastatin9115
OxcarbazepineOxcarbazepine90suppressed
Paroxetine HclParoxetine Hcl90suppressed
Citalopram HbrCitalopram Hydrobromide8712
Memantine HclMemantine Hcl8515
Midodrine HclMidodrine Hcl8417
Oxybutynin Chloride ErOxybutynin Chloride8412
Lantus SolostarInsulin Glargine,hum.Rec.Anlog8318
SpironolactoneSpironolactone8322
TrintellixVortioxetine Hydrobromide79suppressed
FenofibrateFenofibrate,micronized78suppressed
Pravastatin SodiumPravastatin Sodium7614
DigoxinDigoxin7511
Montelukast SodiumMontelukast Sodium7418
Haloperidol LactateHaloperidol Lactate72suppressed
Toujeo SolostarInsulin Glargine,hum.Rec.Anlog7216
Alendronate SodiumAlendronate Sodium70suppressed
Fluoxetine HclFluoxetine Hcl6515
Oxybutynin ChlorideOxybutynin Chloride65suppressed
Lithium CarbonateLithium Carbonate64suppressed
Diltiazem 24hr ErDiltiazem Hcl63suppressed
MethocarbamolMethocarbamol6122
Diltiazem 24hr Er (Cd)Diltiazem Hcl5711
Autoshield Duo Pen NeedlePen Needle,dual Safety,diabetc5627
HumalogInsulin Lispro5518
Metformin Hcl ErMetformin Hcl54suppressed
Diclofenac SodiumDiclofenac Sodium5318
CeftriaxoneCeftriaxone Sodium5025
IbuprofenIbuprofen4912
Bupropion XlBupropion Hcl47suppressed
Isosorbide Mononitrate ErIsosorbide Mononitrate4711
Amoxicillin-Clavulanate PotassAmoxicillin/Potassium Clav4531
Cefpodoxime ProxetilCefpodoxime Proxetil4536
EzetimibeEzetimibe4511
LinzessLinaclotide45suppressed
Propranolol HclPropranolol Hcl45suppressed
Tirosint-SolLevothyroxine Sodium42suppressed
AtenololAtenolol41suppressed
Oseltamivir PhosphateOseltamivir Phosphate4133
CefuroximeCefuroxime Axetil4016
Doxycycline MonohydrateDoxycycline Monohydrate4016
EntrestoSacubitril/Valsartan40suppressed
Fluticasone PropionateFluticasone Propionate4024
SucralfateSucralfate40suppressed
AustedoDeutetrabenazine39suppressed
Brimonidine TartrateBrimonidine Tartrate39suppressed
Chlorhexidine GluconateChlorhexidine Gluconate3915
Fludrocortisone AcetateFludrocortisone Acetate39suppressed
Olanzapine OdtOlanzapine39suppressed
Paliperidone ErPaliperidone39suppressed
Quetiapine Fumarate ErQuetiapine Fumarate39suppressed
BudesonideBudesonide3811
Carbidopa-LevodopaCarbidopa/Levodopa3814
FluconazoleFluconazole38suppressed
KerendiaFinerenone38suppressed
Methenamine HippurateMethenamine Hippurate38suppressed
Vancomycin HclVancomycin Hcl38suppressed
Doxycycline HyclateDoxycycline Hyclate3624
MounjaroTirzepatide36suppressed
RestasisCyclosporine36suppressed
IngrezzaValbenazine Tosylate35suppressed
PerphenazinePerphenazine35suppressed
Ropinirole HclRopinirole Hcl35suppressed
FarxigaDapagliflozin Propanediol34suppressed
Lyumjev Kwikpen U-100Insulin Lispro-Aabc33suppressed
AzithromycinAzithromycin3116
Hydroxychloroquine SulfateHydroxychloroquine Sulfate31suppressed
Spiriva HandihalerTiotropium Bromide31suppressed
Clonidine HclClonidine Hcl30suppressed
Brimonidine Tartrate-TimololBrimonidine Tartrate/Timolol29suppressed
CarbamazepineCarbamazepine29suppressed
Solifenacin SuccinateSolifenacin Succinate29suppressed
Sulfamethoxazole-TrimethoprimSulfamethoxazole/Trimethoprim29suppressed
Timolol MaleateTimolol Maleate29suppressed
TopiramateTopiramate29suppressed
Fluticasone-SalmeterolFluticasone Propion/Salmeterol28suppressed
Lidocaine HclLidocaine Hcl2818
RoflumilastRoflumilast28suppressed
Albuterol Sulfate HfaAlbuterol Sulfate2718
Anoro ElliptaUmeclidinium Brm/Vilanterol Tr27suppressed
JanumetSitagliptin Phos/Metformin Hcl27suppressed
LokelmaSodium Zirconium Cyclosilicate26suppressed
ValsartanValsartan26suppressed
Albuterol SulfateAlbuterol Sulfate2513
Enoxaparin SodiumEnoxaparin Sodium2513
RhopressaNetarsudil Mesylate25suppressed
Chlorpromazine HclChlorpromazine Hcl24suppressed
Insulin Lispro Kwikpen U-100Insulin Lispro24suppressed
Risperdal ConstaRisperidone Microspheres24suppressed
ColchicineColchicine23suppressed
Kapspargo SprinkleMetoprolol Succinate22suppressed
XifaxanRifaximin22suppressed
LorazepamLorazepam21suppressed
Meclizine HclMeclizine Hcl2111
MupirocinMupirocin21suppressed
Rosuvastatin CalciumRosuvastatin Calcium21suppressed
Trelegy ElliptaFluticasone/Umeclidin/Vilanter21suppressed
Trihexyphenidyl HclTrihexyphenidyl Hcl21suppressed
Combivent RespimatIpratropium/Albuterol Sulfate20suppressed
Prednisolone AcetatePrednisolone Acetate20suppressed
TrulicityDulaglutide20suppressed
CephalexinCephalexin1912
Clindamycin HclClindamycin Hcl19suppressed
LidocaineLidocaine19suppressed
MeloxicamMeloxicam19suppressed
Dupixent SyringeDupilumab18suppressed
Fluphenazine HclFluphenazine Hcl18suppressed
Folic AcidFolic Acid18suppressed
Insulin LisproInsulin Lispro1811
Ipratropium BromideIpratropium Bromide18suppressed
LevemirInsulin Detemir18suppressed
NystatinNystatin18suppressed
Oxycodone HclOxycodone Hcl1813
OzempicSemaglutide18suppressed
ProcritEpoetin Alfa18suppressed
Triamcinolone AcetonideTriamcinolone Acetonide18suppressed
Ventolin HfaAlbuterol Sulfate18suppressed
CalcitriolCalcitriol17suppressed
ClonazepamClonazepam17suppressed
Diltiazem 12hr ErDiltiazem Hcl17suppressed
Insulin Glargine-YfgnInsulin Glargine-Yfgn1712
MetronidazoleMetronidazole17suppressed
Pioglitazone HclPioglitazone Hcl17suppressed
PrimidonePrimidone17suppressed
Tramadol HclTramadol Hcl1712
Wixela InhubFluticasone Propion/Salmeterol17suppressed
AmantadineAmantadine Hcl16suppressed
LevofloxacinLevofloxacin1611
RamelteonRamelteon16suppressed
Acetic AcidAcetic Acid15suppressed
Amiodarone HclAmiodarone Hcl15suppressed
Doxepin HclDoxepin Hcl15suppressed
ErythromycinErythromycin Base15suppressed
FenofibrateFenofibrate15suppressed
NateglinideNateglinide15suppressed
Amitriptyline HclAmitriptyline Hcl14suppressed
CombiganBrimonidine Tartrate/Timolol14suppressed
Dilt-XrDiltiazem Hcl14suppressed
SilodosinSilodosin14suppressed
ClonidineClonidine13suppressed
DexamethasoneDexamethasone13suppressed
DofetilideDofetilide13suppressed
GemfibrozilGemfibrozil13suppressed
GemtesaVibegron13suppressed
GlimepirideGlimepiride13suppressed
GlipizideGlipizide13suppressed
GlycopyrrolateGlycopyrrolate13suppressed
HydroxyureaHydroxyurea13suppressed
Mesalamine ErMesalamine13suppressed
Mycophenolate MofetilMycophenolate Mofetil13suppressed
Nortriptyline HclNortriptyline Hcl13suppressed
Omega-3 Acid Ethyl EstersOmega-3 Acid Ethyl Esters13suppressed
Ondansetron OdtOndansetron1313
Rasagiline MesylateRasagiline Mesylate13suppressed
RivastigmineRivastigmine13suppressed
RivastigmineRivastigmine Tartrate13suppressed
SpsSodium Polystyrene Sulfon/Sorb13suppressed
UrsodiolUrsodiol13suppressed
AmoxicillinAmoxicillin12suppressed
Benazepril HclBenazepril Hcl12suppressed
BumetanideBumetanide12suppressed
Carbamazepine ErCarbamazepine12suppressed
Clomipramine HclClomipramine Hcl12suppressed
Dextrose 5%-0.45% NaclDextrose 5 %-0.45 % Sod Chlord12suppressed
Dorzolamide HclDorzolamide Hcl12suppressed
Dorzolamide-TimololDorzolamide Hcl/Timolol Maleat12suppressed
Hydroxyzine PamoateHydroxyzine Pamoate12suppressed
Invega SustennaPaliperidone Palmitate12suppressed
LansoprazoleLansoprazole12suppressed
Lidocaine HclLidocaine Hcl/Pf12suppressed
LovastatinLovastatin12suppressed
Memantine Hcl ErMemantine Hcl12suppressed
Metformin Er OsmoticMetformin Hcl12suppressed
ScopolamineScopolamine12suppressed
Azelastine-FluticasoneAzelastine/Fluticasone11suppressed
Balsalazide DisodiumBalsalazide Disodium11suppressed
Bupropion HclBupropion Hcl11suppressed
Bupropion Hcl SrBupropion Hcl11suppressed
Fluvoxamine MaleateFluvoxamine Maleate11suppressed
LiraglutideLiraglutide11suppressed
NyamycNystatin11suppressed
Prazosin HclPrazosin Hcl11suppressed
SantylCollagenase Clostridium Hist.11suppressed
Sodium ChlorideSodium Chloride 0.45 %11suppressed
ZonisamideZonisamide11suppressed

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 $335.74 · 14 records PFIZER INC. ELIQUIS, INGREZZA, LifeVest, NURTEC ODT, PAXLOVID, ULTOMIRIS, VYNDAQEL, XIFAXAN 3
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