Healthcare provider profile · identity verified

Daniel John Callahan, PA-C

Physician Assistants & Advanced Practice Nursing Providers|Physician Assistant · PEACHTREE CITY, GA · NPI 1265998439

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 Daniel John Callahan, PA-C received $1,735.86 in general payments during 2025 across 95 reported records.

AstraZeneca Pharmaceuticals LP accounted for 15.9% of that reported general-payment amount.

The Open Payments records used for this analysis explicitly named 32 associated products.

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

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 12 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 52 claims for Farxiga 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 17 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 57 claims for Mounjaro by this doctor in 2024.

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

Payment overview · 2025

General Payments

$1,735.86

95 reported records · 21 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
AstraZeneca Pharmaceuticals LP Unresolved — no canonical attribution shown $276.5515.9%122025
Axsome Therapeutics, Inc. Unresolved — no canonical attribution shown $219.9312.7%92025
ABBVIE INC. Unresolved — no canonical attribution shown $194.8711.2%172025
PFIZER INC. Unresolved — no canonical attribution shown $167.619.7%112025
Lilly USA, LLC Unresolved — no canonical attribution shown $149.968.6%92025
Novo Nordisk Inc Unresolved — no canonical attribution shown $124.867.2%62025
Salix Pharmaceuticals, a division of Bausch Health US, LLC Unresolved — no canonical attribution shown $81.724.7%52025
Corcept Therapeutics Unresolved — no canonical attribution shown $81.314.7%32025
Otsuka America Pharmaceutical, Inc. Unresolved — no canonical attribution shown $79.514.6%42025
Amgen Inc. Unresolved — no canonical attribution shown $64.203.7%42025
Lundbeck LLC Unresolved — no canonical attribution shown $47.762.8%22025
Collegium Pharmaceutical, Inc. Unresolved — no canonical attribution shown $43.882.5%22025
Noven Therapeutics, LLC Unresolved — no canonical attribution shown $39.302.3%22025
Phathom Pharmaceuticals, Inc. Unresolved — no canonical attribution shown $32.401.9%22025
Boston Scientific Corporation Unresolved — no canonical attribution shown $22.611.3%12025
Stryker Corporation Unresolved — no canonical attribution shown $21.731.2%12025
Actelion Pharmaceuticals US, Inc. Unresolved — no canonical attribution shown $21.011.2%12025
Antares Pharma, Inc. Unresolved — no canonical attribution shown $20.051.2%12025
Indivior Inc. Unresolved — no canonical attribution shown $19.121.1%12025
Exact Sciences Corporation Unresolved — no canonical attribution shown $13.760.8%12025
SANOFI-AVENTIS U.S. LLC Unresolved — no canonical attribution shown $13.720.8%12025

What were the payments for?

Payment categories

CategoryAmountRecords
Food and Beverage$1,735.8695

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
AIRSUPRA
Normalized: airsupra
Drug AstraZeneca Pharmaceuticals LP $186.84 9 2025
Source payment records
NURTEC ODT
Normalized: nurtec odt
Drug PFIZER INC. $167.61 11 2025
Source payment records
ZAVZPRET
Normalized: zavzpret
Drug PFIZER INC. $146.65 10 2025
Source payment records
REXULTI
Normalized: rexulti
Drug Lundbeck LLC, Otsuka America Pharmaceutical, Inc. $127.27 6 2025
Source payment records
Symbravo
Normalized: symbravo
Drug Axsome Therapeutics, Inc. $119.38 4 2025
Source payment records
Auvelity
Normalized: auvelity
Drug Axsome Therapeutics, Inc. $100.55 5 2025
Source payment records
VRAYLAR
Normalized: vraylar
Drug ABBVIE INC. $100.22 7 2025
Source payment records
UBRELVY
Normalized: ubrelvy
Drug ABBVIE INC. $94.65 10 2025
Source payment records
FARXIGA
Normalized: farxiga
Drug AstraZeneca Pharmaceuticals LP $89.71 3 2025
Source payment records
MOUNJARO
Normalized: mounjaro
Drug Lilly USA, LLC $86.52 6 2025
Source payment records
ZEPBOUND
Normalized: zepbound
Drug Lilly USA, LLC $86.52 6 2025
Source payment records
XIFAXAN
Normalized: xifaxan
Drug Salix Pharmaceuticals, a division of Bausch Health US, LLC $81.72 5 2025
Source payment records
  • 2025-03-24 · Salix Pharmaceuticals, a division of Bausch Health US, LLC · $19.50 · Open Payments source
  • 2025-08-18 · Salix Pharmaceuticals, a division of Bausch Health US, LLC · $15.08 · Open Payments source
  • 2025-10-20 · Salix Pharmaceuticals, a division of Bausch Health US, LLC · $13.58 · Open Payments source
  • 2025-10-20 · Salix Pharmaceuticals, a division of Bausch Health US, LLC · $17.13 · Open Payments source
  • 2025-12-01 · Salix Pharmaceuticals, a division of Bausch Health US, LLC · $16.43 · Open Payments source
Korlym
Normalized: korlym
Drug Corcept Therapeutics $81.31 3 2025
Source payment records
QULIPTA
Normalized: qulipta
Drug ABBVIE INC. $73.08 8 2025
Source payment records
Wegovy
Normalized: wegovy
Drug Novo Nordisk Inc $66.99 3 2025
Source payment records
OTEZLA
Normalized: otezla
Drug Amgen Inc. $64.20 4 2025
Source payment records
REPATHA
Normalized: repatha
Biological Amgen Inc. $64.20 4 2025
Source payment records
JARDIANCE
Normalized: jardiance
Drug Lilly USA, LLC $63.44 3 2025
Source payment records
Ozempic
Normalized: ozempic
Drug Novo Nordisk Inc $57.87 3 2025
Source payment records
Rybelsus
Normalized: rybelsus
Drug Novo Nordisk Inc $57.87 3 2025
Source payment records
Jornay PM
Normalized: jornay pm
Drug Collegium Pharmaceutical, Inc. $43.88 2 2025
Source payment records
Xelstrym
Normalized: xelstrym
Drug Noven Therapeutics, LLC $39.30 2 2025
Source payment records
VOQUEZNA
Normalized: voquezna
Drug Phathom Pharmaceuticals, Inc. $32.40 2 2025
Source payment records
Axonics
Normalized: axonics
Device Boston Scientific Corporation $22.61 1 2025
Source payment records
MAKO
Normalized: mako
Device Stryker Corporation $21.73 1 2025
Source payment records
OPSUMIT
Normalized: opsumit
Drug Actelion Pharmaceuticals US, Inc. $21.01 1 2025
Source payment records
UPTRAVI
Normalized: uptravi
Drug Actelion Pharmaceuticals US, Inc. $21.01 1 2025
Source payment records
ELIQUIS
Normalized: eliquis
Drug PFIZER INC. $20.96 1 2025
Source payment records
XYOSTED
Normalized: xyosted
Drug Antares Pharma, Inc. $20.05 1 2025
Source payment records
SUBLOCADE
Normalized: sublocade
Drug Indivior Inc. $19.12 1 2025
Source payment records
Cologuard Collection Kit
Normalized: cologuard collection kit
Device Exact Sciences Corporation $13.76 1 2025
Source payment records
TZIELD
Normalized: tzield
Biological SANOFI-AVENTIS U.S. LLC $13.72 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 52 exact normalized Medicare Part D
JARDIANCE
jardiance
2025 Jardiance 2024 17
Beneficiary count suppressed
exact normalized Medicare Part D
MOUNJARO
mounjaro
2025 Mounjaro 2024 57 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
12 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
52 13
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
17 suppressed by CMS
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
57 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
Amlodipine BesylateAmlodipine Besylate12248
Atorvastatin CalciumAtorvastatin Calcium10641
Rosuvastatin CalciumRosuvastatin Calcium9739
PrednisonePrednisone6039
MounjaroTirzepatide5712
FarxigaDapagliflozin Propanediol5213
OmeprazoleOmeprazole4719
Levothyroxine SodiumLevothyroxine Sodium4615
TelmisartanTelmisartan4615
LisinoprilLisinopril4115
Sertraline HclSertraline Hcl3613
Albuterol Sulfate HfaAlbuterol Sulfate3215
ClonazepamClonazepam32suppressed
Metoprolol SuccinateMetoprolol Succinate32suppressed
AlprazolamAlprazolam30suppressed
Losartan PotassiumLosartan Potassium3015
Doxycycline HyclateDoxycycline Hyclate2923
Metformin Hcl ErMetformin Hcl2912
Fluticasone PropionateFluticasone Propionate2821
AzithromycinAzithromycin2724
Ondansetron OdtOndansetron2715
Amoxicillin-Clavulanate PotassAmoxicillin/Potassium Clav2622
FluconazoleFluconazole2614
Ipratropium BromideIpratropium Bromide2612
CarvedilolCarvedilol24suppressed
FurosemideFurosemide21suppressed
MeloxicamMeloxicam21suppressed
Ondansetron HclOndansetron Hcl21suppressed
Tamsulosin HclTamsulosin Hcl21suppressed
GabapentinGabapentin2011
Zolpidem TartrateZolpidem Tartrate20suppressed
Diclofenac SodiumDiclofenac Sodium19suppressed
Trazodone HclTrazodone Hcl19suppressed
ChlorthalidoneChlorthalidone18suppressed
Escitalopram OxalateEscitalopram Oxalate17suppressed
EzetimibeEzetimibe17suppressed
JardianceEmpagliflozin17suppressed
Metformin HclMetformin Hcl16suppressed
CefdinirCefdinir1513
FamotidineFamotidine15suppressed
HydrochlorothiazideHydrochlorothiazide15suppressed
IbuprofenIbuprofen15suppressed
MethylprednisoloneMethylprednisolone1511
Alendronate SodiumAlendronate Sodium14suppressed
CelecoxibCelecoxib14suppressed
Potassium ChloridePotassium Chloride14suppressed
Venlafaxine Hcl ErVenlafaxine Hcl14suppressed
Duloxetine HclDuloxetine Hcl13suppressed
EszopicloneEszopiclone12suppressed
GlipizideGlipizide12suppressed
Losartan-HydrochlorothiazideLosartan/Hydrochlorothiazide12suppressed
Pantoprazole SodiumPantoprazole Sodium12suppressed
SynthroidLevothyroxine Sodium12suppressed
Testosterone CypionateTestosterone Cypionate12suppressed
Azelastine HclAzelastine Hcl11suppressed
Buspirone HclBuspirone Hcl11suppressed
Esomeprazole MagnesiumEsomeprazole Magnesium11suppressed
LamotrigineLamotrigine11suppressed

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 $1,735.86 · 95 records AstraZeneca Pharmaceuticals LP AIRSUPRA, Auvelity, Axonics, Cologuard Collection Kit, ELIQUIS, FARXIGA, JARDIANCE, Jornay PM, Korlym, MAKO, MOUNJARO, NURTEC ODT, OPSUMIT, OTEZLA, Ozempic, QULIPTA, REPATHA, REXULTI, Rybelsus, SUBLOCADE, Symbravo, TZIELD, UBRELVY, UPTRAVI, VOQUEZNA, VRAYLAR, Wegovy, XIFAXAN, XYOSTED, Xelstrym, ZAVZPRET, ZEPBOUND 4
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