Healthcare provider profile · identity verified

Thomas Dee Callahan, M.D.

Allopathic & Osteopathic Physicians|Family Medicine · ST GEORGE, UT · NPI 1043328123

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 Thomas Dee Callahan, M.D. received $563.89 in general payments during 2025 across 29 reported records.

PFIZER INC. accounted for 15.0% of that reported general-payment amount.

The Open Payments records used for this analysis explicitly named 24 associated products.

A separate comparison found the same explicitly named product in public Medicare Part D data: Jardiance, Mounjaro, Ozempic, Zenpep.

ABBVIE 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 LINZESS as an associated drug or biological on 87954 records involving 21815 distinct recipient NPIs. Public Medicare Part D data also shows 13 claims for Linzess by this doctor in 2024.

Aimmune Therapeutics, 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 ZENPEP as an associated drug or biological on 32144 records involving 12432 distinct recipient NPIs. Public Medicare Part D data also shows 15 claims for Zenpep by this doctor in 2024.

Boehringer Ingelheim Pharmaceuticals, 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 JARDIANCE as an associated drug or biological on 123636 records involving 49438 distinct recipient NPIs. Public Medicare Part D data also shows 38 claims for Jardiance by this doctor in 2024.

Lilly USA, 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 JARDIANCE as an associated drug or biological on 47708 records involving 23833 distinct recipient NPIs. Public Medicare Part D data also shows 38 claims for Jardiance by this doctor in 2024.

Lilly USA, 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 MOUNJARO as an associated drug or biological on 186719 records involving 66436 distinct recipient NPIs. Public Medicare Part D data also shows 32 claims for Mounjaro by this doctor in 2024.

Lilly USA, 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 TRULICITY as an associated drug or biological on 71 records involving 57 distinct recipient NPIs. Public Medicare Part D data also shows 13 claims for Trulicity by this doctor in 2024.

Novo Nordisk 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 Ozempic as an associated drug or biological on 261625 records involving 77793 distinct recipient NPIs. Public Medicare Part D data also shows 25 claims for Ozempic 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 54 claims for Eliquis by this doctor in 2024.

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

Payment overview · 2025

General Payments

$563.89

29 reported records · 17 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 $84.4515.0%52025
Amgen Inc. Unresolved — no canonical attribution shown $63.5411.3%32025
Boston Scientific Corporation Unresolved — no canonical attribution shown $61.7210.9%32025
Novartis Pharmaceuticals Corporation Unresolved — no canonical attribution shown $49.458.8%22025
Otsuka America Pharmaceutical, Inc. Unresolved — no canonical attribution shown $36.726.5%22025
Lilly USA, LLC Unresolved — no canonical attribution shown $34.066.0%22025
Organon LLC Unresolved — no canonical attribution shown $28.425.0%22025
Lundbeck LLC Unresolved — no canonical attribution shown $28.165.0%12025
ABBVIE INC. Unresolved — no canonical attribution shown $26.044.6%12025
KYOWA KIRIN, INC. Unresolved — no canonical attribution shown $23.694.2%12025
Boehringer Ingelheim Pharmaceuticals, Inc. Unresolved — no canonical attribution shown $20.393.6%12025
Medtronic, Inc. Medtronic, Inc.
exact · evidence 2025-07-22
$19.813.5%12025
SANOFI PASTEUR INC. Unresolved — no canonical attribution shown $19.323.4%12025
Novo Nordisk Inc Unresolved — no canonical attribution shown $19.113.4%12025
IDORSIA PHARMACEUTICALS US INC Unresolved — no canonical attribution shown $17.253.1%12025
Aimmune Therapeutics, Inc. Unresolved — no canonical attribution shown $16.452.9%12025
Digestive Care, Inc. Unresolved — no canonical attribution shown $15.312.7%12025

What were the payments for?

Payment categories

CategoryAmountRecords
Food and Beverage$563.8929

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
ABRYSVO
Normalized: abrysvo
Biological PFIZER INC. $65.68 4 2025
Source payment records
PREVNAR 20
Normalized: prevnar 20
Biological PFIZER INC. $65.68 4 2025
Source payment records
REXULTI
Normalized: rexulti
Drug Lundbeck LLC, Otsuka America Pharmaceutical, Inc. $64.88 3 2025
Source payment records
COMIRNATY
Normalized: comirnaty
Biological PFIZER INC. $51.27 3 2025
Source payment records
LEQVIO
Normalized: leqvio
Drug Novartis Pharmaceuticals Corporation $49.45 2 2025
Source payment records
General - Pain Management
Normalized: general pain management
Device Boston Scientific Corporation $45.74 2 2025
Source payment records
JARDIANCE
Normalized: jardiance
Drug Boehringer Ingelheim Pharmaceuticals, Inc., Lilly USA, LLC $40.81 2 2025
Source payment records
EVENITY
Normalized: evenity
Biological Amgen Inc. $36.02 2 2025
Source payment records
NEXPLANON
Normalized: nexplanon
Drug Organon LLC $28.42 2 2025
Source payment records
KRYSTEXXA
Normalized: krystexxa
Biological Amgen Inc. $27.52 1 2025
Source payment records
QULIPTA
Normalized: qulipta
Drug ABBVIE INC. $26.04 1 2025
Source payment records
UBRELVY
Normalized: ubrelvy
Drug ABBVIE INC. $26.04 1 2025
Source payment records
CRYSVITA
Normalized: crysvita
Drug KYOWA KIRIN, INC. $23.69 1 2025
Source payment records
VENASEAL
Normalized: venaseal
Device Medtronic, Inc. $19.81 1 2025
Source payment records
BEYFORTUS
Normalized: beyfortus
Biological SANOFI PASTEUR INC. $19.32 1 2025
Source payment records
FLUBLOK QUADRIVALENT NORTHERN HEMISPHERE
Normalized: flublok quadrivalent northern hemisphere
Biological SANOFI PASTEUR INC. $19.32 1 2025
Source payment records
FLUZONE HIGH-DOSE
Normalized: fluzone high dose
Biological SANOFI PASTEUR INC. $19.32 1 2025
Source payment records
Ozempic
Normalized: ozempic
Drug Novo Nordisk Inc $19.11 1 2025
Source payment records
NURTEC ODT
Normalized: nurtec odt
Drug PFIZER INC. $18.77 1 2025
Source payment records
Quviviq
Normalized: quviviq
Drug IDORSIA PHARMACEUTICALS US INC $17.25 1 2025
Source payment records
ZENPEP
Normalized: zenpep
Drug Aimmune Therapeutics, Inc. $16.45 1 2025
Source payment records
WATCHMAN FLX
Normalized: watchman flx
Device Boston Scientific Corporation $15.98 1 2025
Source payment records
Pertzye
Normalized: pertzye
Drug Digestive Care, Inc. $15.31 1 2025
Source payment records
MOUNJARO
Normalized: mounjaro
Drug Lilly USA, LLC $13.64 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
JARDIANCE
jardiance
2025 Jardiance 2024 38 exact normalized Medicare Part D
MOUNJARO
mounjaro
2025 Mounjaro 2024 32
Beneficiary count suppressed
exact normalized Medicare Part D
Ozempic
ozempic
2025 Ozempic 2024 25
Beneficiary count suppressed
exact normalized Medicare Part D
ZENPEP
zenpep
2025 Zenpep 2024 15
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
ABBVIE INC.
Exact reporting entity; no affiliate inference
2025 LINZESS
open payments reported associated product
CMS Open Payments — General Payments
87954 supporting records · 21815 recipient NPIs · example record 1201352608
Linzess · 2024
Exact normalized brand match · 1 Part D row
13 suppressed by CMS
Aimmune Therapeutics, Inc.
Exact reporting entity; no affiliate inference
2025 ZENPEP
open payments reported associated product
CMS Open Payments — General Payments
32144 supporting records · 12432 recipient NPIs · example record 1249641927
Zenpep · 2024
Exact normalized brand match · 1 Part D row
15 suppressed by CMS
Boehringer Ingelheim Pharmaceuticals, Inc.
Exact reporting entity; no affiliate inference
2025 JARDIANCE
open payments reported associated product
CMS Open Payments — General Payments
123636 supporting records · 49438 recipient NPIs · example record 1221811583
Jardiance · 2024
Exact normalized brand match · 1 Part D row
38 12
Lilly USA, LLC
Exact reporting entity; no affiliate inference
2025 JARDIANCE
open payments reported associated product
CMS Open Payments — General Payments
47708 supporting records · 23833 recipient NPIs · example record 1186464557
Jardiance · 2024
Exact normalized brand match · 1 Part D row
38 12
Lilly USA, LLC
Exact reporting entity; no affiliate inference
2025 MOUNJARO
open payments reported associated product
CMS Open Payments — General Payments
186719 supporting records · 66436 recipient NPIs · example record 1186464455
Mounjaro · 2024
Exact normalized brand match · 1 Part D row
32 suppressed by CMS
Lilly USA, LLC
Exact reporting entity; no affiliate inference
2025 TRULICITY
open payments reported associated product
CMS Open Payments — General Payments
71 supporting records · 57 recipient NPIs · example record 1186464601
Trulicity · 2024
Exact normalized brand match · 1 Part D row
13 suppressed by CMS
Novo Nordisk Inc
Exact reporting entity; no affiliate inference
2025 Ozempic
open payments reported associated product
CMS Open Payments — General Payments
261625 supporting records · 77793 recipient NPIs · example record 1188130076
Ozempic · 2024
Exact normalized brand match · 1 Part D row
25 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
54 12

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
Levothyroxine SodiumLevothyroxine Sodium32992
Rosuvastatin CalciumRosuvastatin Calcium30496
OmeprazoleOmeprazole26376
Losartan PotassiumLosartan Potassium24172
Potassium ChloridePotassium Chloride22154
LisinoprilLisinopril21565
Atorvastatin CalciumAtorvastatin Calcium21155
Amlodipine BesylateAmlodipine Besylate20461
Metformin HclMetformin Hcl19949
FurosemideFurosemide17348
GabapentinGabapentin15936
Tamsulosin HclTamsulosin Hcl15651
Zolpidem TartrateZolpidem Tartrate14732
AlprazolamAlprazolam14619
AzithromycinAzithromycin14061
Trazodone HclTrazodone Hcl12923
HydrochlorothiazideHydrochlorothiazide12434
Glipizide ErGlipizide10428
SimvastatinSimvastatin10426
Sertraline HclSertraline Hcl10331
LorazepamLorazepam10224
FinasterideFinasteride9829
Losartan-HydrochlorothiazideLosartan/Hydrochlorothiazide8619
Metoprolol SuccinateMetoprolol Succinate8523
TemazepamTemazepam8412
Tramadol HclTramadol Hcl7917
Lisinopril-HydrochlorothiazideLisinopril/Hydrochlorothiazide7623
Pantoprazole SodiumPantoprazole Sodium7319
Oxycodone HclOxycodone Hcl72suppressed
Albuterol Sulfate HfaAlbuterol Sulfate7116
MeloxicamMeloxicam6717
Hydrocodone-AcetaminophenHydrocodone/Acetaminophen6516
PregabalinPregabalin6514
ClonazepamClonazepam64suppressed
EstradiolEstradiol6316
Fluoxetine HclFluoxetine Hcl6312
CelecoxibCelecoxib6017
CarisoprodolCarisoprodol59suppressed
CephalexinCephalexin5828
AllopurinolAllopurinol5619
EliquisApixaban5412
Escitalopram OxalateEscitalopram Oxalate5414
Pravastatin SodiumPravastatin Sodium5316
Oxycodone-AcetaminophenOxycodone Hcl/Acetaminophen52suppressed
Liothyronine SodiumLiothyronine Sodium4913
Metoprolol TartrateMetoprolol Tartrate4813
FluconazoleFluconazole4514
XareltoRivaroxaban45suppressed
Doxycycline MonohydrateDoxycycline Monohydrate4320
PrednisonePrednisone4317
Amoxicillin-Clavulanate PotassAmoxicillin/Potassium Clav4230
Ondansetron HclOndansetron Hcl4113
Bisoprolol-HydrochlorothiazideBisoprolol/Hydrochlorothiazide40suppressed
CarvedilolCarvedilol4011
Duloxetine HclDuloxetine Hcl40suppressed
Ropinirole HclRopinirole Hcl4012
Ciprofloxacin HclCiprofloxacin Hcl3917
Amitriptyline HclAmitriptyline Hcl38suppressed
Dextroamphetamine-AmphetamineDextroamphetamine/Amphetamine38suppressed
JardianceEmpagliflozin3812
Montelukast SodiumMontelukast Sodium37suppressed
SpironolactoneSpironolactone3612
Citalopram HbrCitalopram Hydrobromide35suppressed
DiazepamDiazepam35suppressed
Pioglitazone HclPioglitazone Hcl33suppressed
MounjaroTirzepatide32suppressed
Ondansetron OdtOndansetron32suppressed
Triamcinolone AcetonideTriamcinolone Acetonide3217
Paroxetine HclParoxetine Hcl31suppressed
TopiramateTopiramate31suppressed
Esomeprazole MagnesiumEsomeprazole Magnesium30suppressed
MyrbetriqMirabegron30suppressed
ClopidogrelClopidogrel Bisulfate29suppressed
Warfarin SodiumWarfarin Sodium29suppressed
NaproxenNaproxen28suppressed
Tizanidine HclTizanidine Hcl28suppressed
Olmesartan MedoxomilOlmesartan Medoxomil27suppressed
Alendronate SodiumAlendronate Sodium26suppressed
GlipizideGlipizide26suppressed
IbuprofenIbuprofen26suppressed
FarxigaDapagliflozin Propanediol25suppressed
OzempicSemaglutide25suppressed
Benazepril HclBenazepril Hcl24suppressed
Diphenoxylate-AtropineDiphenoxylate Hcl/Atropine24suppressed
Donepezil HclDonepezil Hcl24suppressed
NystatinNystatin2412
AripiprazoleAripiprazole23suppressed
Bupropion XlBupropion Hcl23suppressed
Quetiapine FumarateQuetiapine Fumarate23suppressed
ValacyclovirValacyclovir Hcl2315
OlanzapineOlanzapine22suppressed
Venlafaxine Hcl ErVenlafaxine Hcl22suppressed
AtenololAtenolol21suppressed
CalcitriolCalcitriol20suppressed
EzetimibeEzetimibe20suppressed
EszopicloneEszopiclone19suppressed
JanuviaSitagliptin Phosphate19suppressed
Pramipexole DihydrochloridePramipexole Di-Hcl19suppressed
PrimidonePrimidone19suppressed
Sumatriptan SuccinateSumatriptan Succinate19suppressed
Toujeo Max SolostarInsulin Glargine,hum.Rec.Anlog19suppressed
Buspirone HclBuspirone Hcl18suppressed
Cyanocobalamin InjectionCyanocobalamin (Vitamin B-12)18suppressed
Lantus SolostarInsulin Glargine,hum.Rec.Anlog18suppressed
Potassium Citrate ErPotassium Citrate18suppressed
Bupropion Hcl SrBupropion Hcl17suppressed
Cyclobenzaprine HclCyclobenzaprine Hcl17suppressed
FamotidineFamotidine17suppressed
AmoxicillinAmoxicillin16suppressed
MirtazapineMirtazapine16suppressed
Propranolol HclPropranolol Hcl16suppressed
Basaglar Kwikpen U-100Insulin Glargine,hum.Rec.Anlog15suppressed
Fluticasone PropionateFluticasone Propionate15suppressed
Hydroxyzine HclHydroxyzine Hcl15suppressed
ZenpepLipase/Protease/Amylase15suppressed
Diltiazem 24hr Er (Cd)Diltiazem Hcl14suppressed
Doxazosin MesylateDoxazosin Mesylate14suppressed
Sulfamethoxazole-TrimethoprimSulfamethoxazole/Trimethoprim1412
LamotrigineLamotrigine13suppressed
LinzessLinaclotide13suppressed
Oxybutynin ChlorideOxybutynin Chloride13suppressed
TrulicityDulaglutide13suppressed
Atrovent HfaIpratropium Bromide12suppressed
Dexlansoprazole DrDexlansoprazole12suppressed
Niacin ErNiacin12suppressed
Nitrofurantoin Mono-MacroNitrofurantoin Monohyd/M-Cryst12suppressed
Oxybutynin Chloride ErOxybutynin Chloride12suppressed
Estradiol (Once Weekly)Estradiol11suppressed
FebuxostatFebuxostat11suppressed
LansoprazoleLansoprazole11suppressed
TorsemideTorsemide11suppressed
Toujeo SolostarInsulin Glargine,hum.Rec.Anlog11suppressed

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 $563.89 · 29 records PFIZER INC. ABRYSVO, BEYFORTUS, COMIRNATY, CRYSVITA, EVENITY, FLUBLOK QUADRIVALENT NORTHERN HEMISPHERE, FLUZONE HIGH-DOSE, General - Pain Management, JARDIANCE, KRYSTEXXA, LEQVIO, MOUNJARO, NEXPLANON, NURTEC ODT, Ozempic, PREVNAR 20, Pertzye, QULIPTA, Quviviq, REXULTI, UBRELVY, VENASEAL, WATCHMAN FLX, ZENPEP 8
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