Healthcare provider profile · identity verified

Robert S Callahan, MD

Allopathic & Osteopathic Physicians|Family Medicine · NEWARK, DE · NPI 1962491779

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 Robert S Callahan, MD received $1,141.62 in general payments during 2025 across 60 reported records.

ABBVIE INC. accounted for 23.8% of that reported general-payment amount.

The Open Payments records used for this analysis explicitly named 31 associated products.

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

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 SYNTHROID as an associated drug or biological on 10655 records involving 4881 distinct recipient NPIs. Public Medicare Part D data also shows 24 claims for Synthroid by this doctor in 2024.

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 23 claims for Farxiga 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 41 claims for Jardiance 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 39 claims for Trelegy Ellipta 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 41 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 25 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 15 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 33 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 16 claims for Eliquis 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 PAXLOVID as an associated drug or biological on 24465 records involving 15715 distinct recipient NPIs. Public Medicare Part D data also shows 11 claims for Paxlovid by this doctor in 2024.

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

Payment overview · 2025

General Payments

$1,141.62

60 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
ABBVIE INC. Unresolved — no canonical attribution shown $271.8523.8%162025
AstraZeneca Pharmaceuticals LP Unresolved — no canonical attribution shown $167.5014.7%72025
Novo Nordisk Inc Unresolved — no canonical attribution shown $138.1812.1%82025
Merck Sharp & Dohme LLC Unresolved — no canonical attribution shown $84.357.4%42025
Gilead Sciences, Inc. Unresolved — no canonical attribution shown $77.276.8%32025
GlaxoSmithKline, LLC. Unresolved — no canonical attribution shown $62.565.5%32025
Takeda Pharmaceuticals U.S.A., Inc. Unresolved — no canonical attribution shown $56.935.0%32025
Exact Sciences Corporation Unresolved — no canonical attribution shown $43.483.8%22025
PFIZER INC. Unresolved — no canonical attribution shown $38.453.4%22025
Astellas Pharma US Inc Unresolved — no canonical attribution shown $37.643.3%22025
Lilly USA, LLC Unresolved — no canonical attribution shown $36.253.2%22025
Boehringer Ingelheim Pharmaceuticals, Inc. Unresolved — no canonical attribution shown $31.732.8%22025
Amgen Inc. Unresolved — no canonical attribution shown $28.692.5%22025
Sumitomo Pharma America, Inc. Unresolved — no canonical attribution shown $18.731.6%12025
Janssen Pharmaceuticals, Inc Unresolved — no canonical attribution shown $17.841.6%12025
Axsome Therapeutics, Inc. Unresolved — no canonical attribution shown $15.471.4%12025
Otsuka America Pharmaceutical, Inc. Unresolved — no canonical attribution shown $14.701.3%12025

What were the payments for?

Payment categories

CategoryAmountRecords
Food and Beverage$1,141.6260

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
UBRELVY
Normalized: ubrelvy
Drug ABBVIE INC. $146.78 9 2025
Source payment records
QULIPTA
Normalized: qulipta
Drug ABBVIE INC. $132.37 8 2025
Source payment records
VRAYLAR
Normalized: vraylar
Drug ABBVIE INC. $125.07 7 2025
Source payment records
FARXIGA
Normalized: farxiga
Drug AstraZeneca Pharmaceuticals LP $108.89 5 2025
Source payment records
Wegovy
Normalized: wegovy
Drug Novo Nordisk Inc $72.09 4 2025
Source payment records
SHINGRIX
Normalized: shingrix
Biological GlaxoSmithKline, LLC. $62.56 3 2025
Source payment records
AIRSUPRA
Normalized: airsupra
Drug AstraZeneca Pharmaceuticals LP $58.61 2 2025
Source payment records
TRINTELLIX
Normalized: trintellix
Drug Takeda Pharmaceuticals U.S.A., Inc. $56.93 3 2025
Source payment records
VAXNEUVANCE
Normalized: vaxneuvance
Biological Merck Sharp & Dohme LLC $45.50 2 2025
Source payment records
LAGEVRIO
Normalized: lagevrio
Drug Merck Sharp & Dohme LLC $38.85 2 2025
Source payment records
NURTEC ODT
Normalized: nurtec odt
Drug PFIZER INC. $38.45 2 2025
Source payment records
Veozah
Normalized: veozah
Drug Astellas Pharma US Inc $37.64 2 2025
Source payment records
JARDIANCE
Normalized: jardiance
Drug Boehringer Ingelheim Pharmaceuticals, Inc. $31.73 2 2025
Source payment records
OTEZLA
Normalized: otezla
Drug Amgen Inc. $28.69 2 2025
Source payment records
REPATHA
Normalized: repatha
Biological Amgen Inc. $28.69 2 2025
Source payment records
AREXVY
Normalized: arexvy
Biological GlaxoSmithKline, LLC. $28.15 1 2025
Source payment records
ENFLONSIA
Normalized: enflonsia
Drug Merck Sharp & Dohme LLC $26.15 1 2025
Source payment records
GARDASIL 9
Normalized: gardasil 9
Biological Merck Sharp & Dohme LLC $26.15 1 2025
Source payment records
MOUNJARO
Normalized: mounjaro
Drug Lilly USA, LLC $22.75 1 2025
Source payment records
ZEPBOUND
Normalized: zepbound
Drug Lilly USA, LLC $22.75 1 2025
Source payment records
Cologuard Collection Kit
Normalized: cologuard collection kit
Device Exact Sciences Corporation $22.62 1 2025
Source payment records
The Cologuard Plus Collection Kit
Normalized: the cologuard plus collection kit
Device Exact Sciences Corporation $20.86 1 2025
Source payment records
CAPVAXIVE
Normalized: capvaxive
Biological Merck Sharp & Dohme LLC $19.35 1 2025
Source payment records
ROTATEQ
Normalized: rotateq
Biological Merck Sharp & Dohme LLC $19.35 1 2025
Source payment records
VAXELIS
Normalized: vaxelis
Biological Merck Sharp & Dohme LLC $19.35 1 2025
Source payment records
GEMTESA
Normalized: gemtesa
Drug Sumitomo Pharma America, Inc. $18.73 1 2025
Source payment records
SPRAVATO
Normalized: spravato
Drug Janssen Pharmaceuticals, Inc $17.84 1 2025
Source payment records
Symbravo
Normalized: symbravo
Drug Axsome Therapeutics, Inc. $15.47 1 2025
Source payment records
REXULTI
Normalized: rexulti
Drug Otsuka America Pharmaceutical, Inc. $14.70 1 2025
Source payment records
SYNTHROID
Normalized: synthroid
Drug ABBVIE INC. $14.41 1 2025
Source payment records
KISUNLA
Normalized: kisunla
Drug Lilly USA, LLC $13.50 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
FARXIGA
farxiga
2025 Farxiga 2024 23
Beneficiary count suppressed
exact normalized Medicare Part D
JARDIANCE
jardiance
2025 Jardiance 2024 41 exact normalized Medicare Part D
MOUNJARO
mounjaro
2025 Mounjaro 2024 25
Beneficiary count suppressed
exact normalized Medicare Part D
SYNTHROID
synthroid
2025 Synthroid 2024 24
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 SYNTHROID
open payments reported associated product
CMS Open Payments — General Payments
10655 supporting records · 4881 recipient NPIs · example record 1201352636
Synthroid · 2024
Exact normalized brand match · 1 Part D row
24 suppressed by CMS
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
23 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
41 11
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
39 suppressed by CMS
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
41 11
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
25 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
15 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
33 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
16 suppressed by CMS
PFIZER INC.
Exact reporting entity; no affiliate inference
2025 PAXLOVID
open payments reported associated product
CMS Open Payments — General Payments
24465 supporting records · 15715 recipient NPIs · example record 1228794432
Paxlovid · 2024
Exact normalized brand match · 1 Part D row
11 11

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 Calcium364105
Rosuvastatin CalciumRosuvastatin Calcium24770
Amlodipine BesylateAmlodipine Besylate22462
Levothyroxine SodiumLevothyroxine Sodium18450
AlprazolamAlprazolam17137
LisinoprilLisinopril17145
Losartan PotassiumLosartan Potassium16244
Metformin HclMetformin Hcl12235
Alendronate SodiumAlendronate Sodium11239
HydrochlorothiazideHydrochlorothiazide10025
GabapentinGabapentin9821
OmeprazoleOmeprazole9327
Zolpidem TartrateZolpidem Tartrate8414
Losartan-HydrochlorothiazideLosartan/Hydrochlorothiazide7623
SimvastatinSimvastatin7121
FamotidineFamotidine6623
Lisinopril-HydrochlorothiazideLisinopril/Hydrochlorothiazide6619
Montelukast SodiumMontelukast Sodium6318
Trazodone HclTrazodone Hcl6218
Tamsulosin HclTamsulosin Hcl6116
FurosemideFurosemide5716
Amlodipine Besylate-BenazeprilAmlodipine Besylate/Benazepril5414
Metoprolol TartrateMetoprolol Tartrate5015
Sertraline HclSertraline Hcl5016
Metoprolol SuccinateMetoprolol Succinate4714
Escitalopram OxalateEscitalopram Oxalate4213
JardianceEmpagliflozin4111
Duloxetine HclDuloxetine Hcl40suppressed
Olmesartan MedoxomilOlmesartan Medoxomil4011
Pioglitazone HclPioglitazone Hcl4012
Olmesartan-HydrochlorothiazideOlmesartan/Hydrochlorothiazide3912
Trelegy ElliptaFluticasone/Umeclidin/Vilanter39suppressed
AllopurinolAllopurinol3811
Fluoxetine HclFluoxetine Hcl37suppressed
Oxycodone HclOxycodone Hcl37suppressed
OzempicSemaglutide33suppressed
AtenololAtenolol32suppressed
Hydrocodone-AcetaminophenHydrocodone/Acetaminophen32suppressed
Fenofibric AcidFenofibric Acid (Choline)30suppressed
Bupropion Hcl SrBupropion Hcl29suppressed
TemazepamTemazepam28suppressed
Albuterol Sulfate HfaAlbuterol Sulfate2715
ChlorthalidoneChlorthalidone27suppressed
Verapamil ErVerapamil Hcl27suppressed
Oxycodone-AcetaminophenOxycodone Hcl/Acetaminophen26suppressed
MounjaroTirzepatide25suppressed
Buspirone HclBuspirone Hcl24suppressed
Donepezil HclDonepezil Hcl24suppressed
Pantoprazole SodiumPantoprazole Sodium24suppressed
Ropinirole HclRopinirole Hcl24suppressed
SynthroidLevothyroxine Sodium24suppressed
EzetimibeEzetimibe23suppressed
FarxigaDapagliflozin Propanediol23suppressed
Fluticasone PropionateFluticasone Propionate23suppressed
Quetiapine FumarateQuetiapine Fumarate23suppressed
LorazepamLorazepam21suppressed
Cyclobenzaprine HclCyclobenzaprine Hcl20suppressed
Memantine HclMemantine Hcl20suppressed
Paroxetine HclParoxetine Hcl20suppressed
PregabalinPregabalin20suppressed
Tramadol HclTramadol Hcl19suppressed
FenofibrateFenofibrate Nanocrystallized18suppressed
Glipizide-MetforminGlipizide/Metformin Hcl17suppressed
EliquisApixaban16suppressed
FinasterideFinasteride16suppressed
Desvenlafaxine Succinate ErDesvenlafaxine Succinate15suppressed
Esomeprazole MagnesiumEsomeprazole Magnesium15suppressed
Nebivolol HclNebivolol Hcl15suppressed
TrulicityDulaglutide15suppressed
Amitriptyline HclAmitriptyline Hcl14suppressed
Amoxicillin-Clavulanate PotassAmoxicillin/Potassium Clav1412
CelecoxibCelecoxib14suppressed
ClonazepamClonazepam14suppressed
Janumet XrSitagliptin Phos/Metformin Hcl14suppressed
Oxybutynin ChlorideOxybutynin Chloride14suppressed
SpironolactoneSpironolactone14suppressed
Ultra-Fine Mini Pen NeedlePen Needle, Diabetic14suppressed
CefdinirCefdinir13suppressed
ClopidogrelClopidogrel Bisulfate13suppressed
Doxepin HclDoxepin Hcl13suppressed
Nitrofurantoin Mono-MacroNitrofurantoin Monohyd/M-Cryst1312
NystatinNystatin13suppressed
Potassium ChloridePotassium Chloride13suppressed
Synjardy XrEmpagliflozin/Metformin Hcl13suppressed
Glipizide ErGlipizide12suppressed
MovantikNaloxegol Oxalate12suppressed
Triamcinolone AcetonideTriamcinolone Acetonide12suppressed
DiazepamDiazepam11suppressed
Dicyclomine HclDicyclomine Hcl11suppressed
FluconazoleFluconazole11suppressed
MirtazapineMirtazapine11suppressed
PaxlovidNirmatrelvir/Ritonavir1111
PrednisonePrednisone11suppressed
ValacyclovirValacyclovir Hcl11suppressed

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 $1,141.62 · 60 records ABBVIE INC. AIRSUPRA, AREXVY, CAPVAXIVE, Cologuard Collection Kit, ENFLONSIA, FARXIGA, GARDASIL 9, GEMTESA, JARDIANCE, KISUNLA, LAGEVRIO, MOUNJARO, NURTEC ODT, OTEZLA, QULIPTA, REPATHA, REXULTI, ROTATEQ, SHINGRIX, SPRAVATO, SYNTHROID, Symbravo, TRINTELLIX, The Cologuard Plus Collection Kit, UBRELVY, VAXELIS, VAXNEUVANCE, VRAYLAR, Veozah, Wegovy, ZEPBOUND 10
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