Healthcare provider profile · identity verified

John B Calhoun, M.D.

Allopathic & Osteopathic Physicians|Internal Medicine · CHARLESTON, SC · NPI 1770845141

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 John B Calhoun, M.D. received $360.43 in general payments during 2025 across 14 reported records.

ABIOMED accounted for 31.9% 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: Trelegy Ellipta.

AstraZeneca Pharmaceuticals LP reported payments to this doctor in 2025. Across the 2025 Open Payments General Payment records loaded for this analysis, that same reporting entity reported FARXIGA as an associated drug or biological on 106133 records involving 42906 distinct recipient NPIs. Public Medicare Part D data also shows 16 claims for Farxiga by this doctor in 2024.

GlaxoSmithKline, 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 TRELEGY ELLIPTA as an associated drug or biological on 131532 records involving 37148 distinct recipient NPIs. Public Medicare Part D data also shows 96 claims for Trelegy Ellipta by this doctor in 2024.

Otsuka America Pharmaceutical, 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 NUEDEXTA as an associated drug or biological on 393 records involving 285 distinct recipient NPIs. Public Medicare Part D data also shows 20 claims for Nuedexta by this doctor in 2024.

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

Payment overview · 2025

General Payments

$360.43

14 reported records · 8 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
ABIOMED Unresolved — no canonical attribution shown $114.9331.9%22025
Amgen Inc. Unresolved — no canonical attribution shown $83.5923.2%52025
Medtronic, Inc. Medtronic, Inc.
exact · evidence 2025-07-22
$59.4616.5%12025
GlaxoSmithKline, LLC. Unresolved — no canonical attribution shown $38.0310.6%22025
Inspire Medical Systems, Inc. Unresolved — no canonical attribution shown $18.715.2%12025
AstraZeneca Pharmaceuticals LP Unresolved — no canonical attribution shown $16.194.5%12025
Dexcom, Inc. Unresolved — no canonical attribution shown $15.384.3%12025
Otsuka America Pharmaceutical, Inc. Unresolved — no canonical attribution shown $14.143.9%12025

What were the payments for?

Payment categories

CategoryAmountRecords
Food and Beverage$360.4314

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
SYMPLICITY G3
Normalized: symplicity g3
Device Medtronic, Inc. $59.46 1 2025
Source payment records
EVENITY
Normalized: evenity
Biological Amgen Inc. $51.98 3 2025
Source payment records
TRELEGY ELLIPTA
Normalized: trelegy ellipta
Drug GlaxoSmithKline, LLC. $38.03 2 2025
Source payment records
REPATHA
Normalized: repatha
Biological Amgen Inc. $31.61 2 2025
Source payment records
INSPIRE
Normalized: inspire
Device Inspire Medical Systems, Inc. $18.71 1 2025
Source payment records
AIRSUPRA
Normalized: airsupra
Drug AstraZeneca Pharmaceuticals LP $16.19 1 2025
Source payment records
Dexcom G6 Transmitter
Normalized: dexcom g6 transmitter
Medical Supply Dexcom, Inc. $15.38 1 2025
Source payment records
REXULTI
Normalized: rexulti
Drug Otsuka America Pharmaceutical, Inc. $14.14 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
TRELEGY ELLIPTA
trelegy ellipta
2025 Trelegy Ellipta 2024 96 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
AstraZeneca Pharmaceuticals LP
Exact reporting entity; no affiliate inference
2025 FARXIGA
open payments reported associated product
CMS Open Payments — General Payments
106133 supporting records · 42906 recipient NPIs · example record 1206131362
Farxiga · 2024
Exact normalized brand match · 1 Part D row
16 suppressed by CMS
GlaxoSmithKline, LLC.
Exact reporting entity; no affiliate inference
2025 TRELEGY ELLIPTA
open payments reported associated product
CMS Open Payments — General Payments
131532 supporting records · 37148 recipient NPIs · example record 1190332369
Trelegy Ellipta · 2024
Exact normalized brand match · 1 Part D row
96 20
Otsuka America Pharmaceutical, Inc.
Exact reporting entity; no affiliate inference
2025 NUEDEXTA
open payments reported associated product
CMS Open Payments — General Payments
393 supporting records · 285 recipient NPIs · example record 1227268901
Nuedexta · 2024
Exact normalized brand match · 1 Part D row
20 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 Calcium713229
Amlodipine BesylateAmlodipine Besylate683198
GabapentinGabapentin556114
Tramadol HclTramadol Hcl520117
Levothyroxine SodiumLevothyroxine Sodium441113
Pantoprazole SodiumPantoprazole Sodium410142
Losartan PotassiumLosartan Potassium408125
Hydrocodone-AcetaminophenHydrocodone/Acetaminophen38296
Trazodone HclTrazodone Hcl34884
LisinoprilLisinopril336100
AlprazolamAlprazolam31450
Metformin HclMetformin Hcl24872
FurosemideFurosemide24178
MeloxicamMeloxicam23769
Sertraline HclSertraline Hcl23665
MounjaroTirzepatide22443
OmeprazoleOmeprazole21870
Albuterol Sulfate HfaAlbuterol Sulfate19862
Tamsulosin HclTamsulosin Hcl19863
Zolpidem TartrateZolpidem Tartrate19335
Fluticasone PropionateFluticasone Propionate19175
Potassium ChloridePotassium Chloride18355
EliquisApixaban17646
Metoprolol SuccinateMetoprolol Succinate16243
Montelukast SodiumMontelukast Sodium16154
Donepezil HclDonepezil Hcl15438
ClonazepamClonazepam15123
HydrochlorothiazideHydrochlorothiazide15045
Memantine HclMemantine Hcl14929
Metformin Hcl ErMetformin Hcl14546
SimvastatinSimvastatin14245
Duloxetine HclDuloxetine Hcl13340
CarvedilolCarvedilol13043
Escitalopram OxalateEscitalopram Oxalate12734
Oxycodone-AcetaminophenOxycodone Hcl/Acetaminophen12427
Metoprolol TartrateMetoprolol Tartrate12338
EzetimibeEzetimibe12136
Buspirone HclBuspirone Hcl11533
Quetiapine FumarateQuetiapine Fumarate11520
Rosuvastatin CalciumRosuvastatin Calcium11428
Alendronate SodiumAlendronate Sodium11336
MethocarbamolMethocarbamol11246
Pravastatin SodiumPravastatin Sodium11136
Bupropion XlBupropion Hcl10726
AllopurinolAllopurinol10529
ChlorthalidoneChlorthalidone10434
Tizanidine HclTizanidine Hcl10222
PregabalinPregabalin9923
FamotidineFamotidine9622
Trelegy ElliptaFluticasone/Umeclidin/Vilanter9620
LorazepamLorazepam9527
ClopidogrelClopidogrel Bisulfate9335
JanuviaSitagliptin Phosphate8923
Nifedipine ErNifedipine8726
OzempicSemaglutide8419
EszopicloneEszopiclone8214
GlimepirideGlimepiride8221
SpironolactoneSpironolactone7719
Esomeprazole MagnesiumEsomeprazole Magnesium7019
Citalopram HbrCitalopram Hydrobromide6917
MirtazapineMirtazapine6918
Glipizide ErGlipizide6620
Oxycodone HclOxycodone Hcl66suppressed
Breo ElliptaFluticasone/Vilanterol6311
Hydroxyzine HclHydroxyzine Hcl6221
Lantus SolostarInsulin Glargine,hum.Rec.Anlog6119
Venlafaxine Hcl ErVenlafaxine Hcl5815
Fluoxetine HclFluoxetine Hcl5713
JardianceEmpagliflozin5718
Nitrofurantoin Mono-MacroNitrofurantoin Monohyd/M-Cryst5631
Ropinirole HclRopinirole Hcl5618
BumetanideBumetanide5518
XareltoRivaroxaban51suppressed
Lisinopril-HydrochlorothiazideLisinopril/Hydrochlorothiazide5018
ValsartanValsartan4913
Cyclobenzaprine HclCyclobenzaprine Hcl4817
Pramipexole DihydrochloridePramipexole Di-Hcl4712
TemazepamTemazepam47suppressed
Dextroamphetamine-AmphetamineDextroamphetamine/Amphetamine46suppressed
Propranolol HclPropranolol Hcl45suppressed
BaclofenBaclofen4413
Hydralazine HclHydralazine Hcl4214
Testosterone CypionateTestosterone Cypionate4211
Ciprofloxacin HclCiprofloxacin Hcl4037
Ondansetron OdtOndansetron4023
Clonidine HclClonidine Hcl3918
GlipizideGlipizide38suppressed
Losartan-HydrochlorothiazideLosartan/Hydrochlorothiazide3815
AtenololAtenolol3616
Triamterene-HydrochlorothiazidTriamterene/Hydrochlorothiazid3612
Bisoprolol FumarateBisoprolol Fumarate35suppressed
Meclizine HclMeclizine Hcl3526
EstradiolEstradiol33suppressed
MyrbetriqMirabegron33suppressed
Colesevelam HclColesevelam Hcl32suppressed
Pioglitazone HclPioglitazone Hcl3211
Doxazosin MesylateDoxazosin Mesylate31suppressed
MethimazoleMethimazole31suppressed
TopiramateTopiramate31suppressed
Amitriptyline HclAmitriptyline Hcl30suppressed
ColchicineColchicine3014
Diclofenac SodiumDiclofenac Sodium3020
Enalapril MaleateEnalapril Maleate30suppressed
FenofibrateFenofibrate30suppressed
LevetiracetamLevetiracetam30suppressed
LinzessLinaclotide30suppressed
LovastatinLovastatin30suppressed
RivastigmineRivastigmine30suppressed
Isosorbide Mononitrate ErIsosorbide Mononitrate2913
Fluticasone-SalmeterolFluticasone Propion/Salmeterol28suppressed
Amoxicillin-Clavulanate PotassAmoxicillin/Potassium Clav2727
NystatinNystatin2715
Ondansetron HclOndansetron Hcl2718
Tresiba Flextouch U-200Insulin Degludec27suppressed
Anoro ElliptaUmeclidinium Brm/Vilanterol Tr26suppressed
MethylprednisoloneMethylprednisolone2625
Midodrine HclMidodrine Hcl26suppressed
Nebivolol HclNebivolol Hcl26suppressed
CelecoxibCelecoxib25suppressed
Doxepin HclDoxepin Hcl25suppressed
Doxycycline MonohydrateDoxycycline Monohydrate2523
Megestrol AcetateMegestrol Acetate2513
RisperidoneRisperidone25suppressed
TelmisartanTelmisartan25suppressed
AzithromycinAzithromycin2424
FinasterideFinasteride2411
LubiprostoneLubiprostone24suppressed
AripiprazoleAripiprazole23suppressed
IrbesartanIrbesartan23suppressed
Diphenoxylate-AtropineDiphenoxylate Hcl/Atropine2214
LidocaineLidocaine22suppressed
Sulfamethoxazole-TrimethoprimSulfamethoxazole/Trimethoprim2216
BelsomraSuvorexant21suppressed
Morphine Sulfate ErMorphine Sulfate21suppressed
Ranolazine ErRanolazine21suppressed
Toujeo Max SolostarInsulin Glargine,hum.Rec.Anlog21suppressed
Vitamin D2Ergocalciferol (Vitamin D2)21suppressed
Aimovig AutoinjectorErenumab-Aooe20suppressed
CefuroximeCefuroxime Axetil2019
Desvenlafaxine Succinate ErDesvenlafaxine Succinate20suppressed
Levocetirizine DihydrochlorideLevocetirizine Dihydrochloride20suppressed
NuedextaDextromethorphan Hbr/Quinidine20suppressed
OlanzapineOlanzapine20suppressed
Paroxetine HclParoxetine Hcl20suppressed
Ulticare Pen NeedlePen Needle, Diabetic20suppressed
CarisoprodolCarisoprodol19suppressed
Diltiazem 24hr ErDiltiazem Hcl19suppressed
GemfibrozilGemfibrozil19suppressed
Omega-3 Acid Ethyl EstersOmega-3 Acid Ethyl Esters19suppressed
Phenytoin Sodium ExtendedPhenytoin Sodium Extended19suppressed
PrednisonePrednisone1912
TrulicityDulaglutide19suppressed
LansoprazoleLansoprazole18suppressed
Clindamycin HclClindamycin Hcl1715
Dicyclomine HclDicyclomine Hcl17suppressed
Diltiazem 24hr Er (Cd)Diltiazem Hcl17suppressed
FentanylFentanyl17suppressed
Promethazine HclPromethazine Hcl17suppressed
SucralfateSucralfate17suppressed
Terazosin HclTerazosin Hcl17suppressed
ValacyclovirValacyclovir Hcl17suppressed
Warfarin SodiumWarfarin Sodium17suppressed
FarxigaDapagliflozin Propanediol16suppressed
FluconazoleFluconazole1616
Hydroxychloroquine SulfateHydroxychloroquine Sulfate16suppressed
Novolin 70-30 FlexpenInsulin Nph Hum/Reg Insulin Hm16suppressed
Olmesartan MedoxomilOlmesartan Medoxomil16suppressed
DiazepamDiazepam15suppressed
Divalproex Sodium ErDivalproex Sodium15suppressed
LantusInsulin Glargine,hum.Rec.Anlog15suppressed
Methylphenidate HclMethylphenidate Hcl15suppressed
NitroglycerinNitroglycerin15suppressed
Novolog FlexpenInsulin Aspart15suppressed
Triamcinolone AcetonideTriamcinolone Acetonide15suppressed
JantovenWarfarin Sodium14suppressed
LetrozoleLetrozole14suppressed
Levemir FlexpenInsulin Detemir14suppressed
Wixela InhubFluticasone Propion/Salmeterol14suppressed
Advair DiskusFluticasone Propion/Salmeterol13suppressed
Alprazolam ErAlprazolam13suppressed
NitrofurantoinNitrofurantoin Macrocrystal13suppressed
RamiprilRamipril13suppressed
RybelsusSemaglutide13suppressed
SavellaMilnacipran Hcl13suppressed
SynthroidLevothyroxine Sodium13suppressed
Ultra-Fine Short Pen NeedlePen Needle, Diabetic13suppressed
Basaglar Kwikpen U-100Insulin Glargine,hum.Rec.Anlog12suppressed
Brimonidine Tartrate-TimololBrimonidine Tartrate/Timolol12suppressed
CarbamazepineCarbamazepine12suppressed
EdarbiAzilsartan Medoxomil12suppressed
FenofibrateFenofibrate Nanocrystallized12suppressed
Humulin 70/30 KwikpenInsulin Nph Hum/Reg Insulin Hm12suppressed
Janumet XrSitagliptin Phos/Metformin Hcl12suppressed
LamotrigineLamotrigine12suppressed
LevofloxacinLevofloxacin1212
ZonisamideZonisamide12suppressed
Acetaminophen-CodeineAcetaminophen With Codeine11suppressed
Amlodipine Besylate-BenazeprilAmlodipine Besylate/Benazepril11suppressed
BelbucaBuprenorphine Hcl11suppressed
Benazepril HclBenazepril Hcl11suppressed
Bupropion Hcl SrBupropion Hcl11suppressed
Diltiazem HclDiltiazem Hcl11suppressed
Divalproex SodiumDivalproex Sodium11suppressed
Ipratropium BromideIpratropium Bromide11suppressed
ModafinilModafinil11suppressed
Tresiba Flextouch U-100Insulin Degludec11suppressed
Valsartan-HydrochlorothiazideValsartan/Hydrochlorothiazide11suppressed

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 $360.43 · 14 records ABIOMED AIRSUPRA, Dexcom G6 Transmitter, EVENITY, INSPIRE, REPATHA, REXULTI, SYMPLICITY G3, TRELEGY ELLIPTA 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