Healthcare provider profile · identity verified

Mark Byron Jennings, MD

Allopathic & Osteopathic Physicians|Internal Medicine|Hematology & Oncology · ALLEN, TX · NPI 1336379783

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 Mark Byron Jennings, MD received $728.28 in general payments during 2025 across 35 reported records.

PFIZER INC. accounted for 31.7% of that reported general-payment amount.

The Open Payments records used for this analysis explicitly named 21 associated products.

A separate comparison found the same explicitly named product in public Medicare Part D data: Brukinsa, Calquence, Eliquis, Imbruvica.

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 IMBRUVICA as an associated drug or biological on 15599 records involving 6881 distinct recipient NPIs. Public Medicare Part D data also shows 54 claims for Imbruvica by this doctor in 2024.

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 VENCLEXTA as an associated drug or biological on 10417 records involving 4944 distinct recipient NPIs. Public Medicare Part D data also shows 27 claims for Venclexta by this doctor in 2024.

ARRAY BIOPHARMA 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 XTANDI as an associated drug or biological on 98 records involving 88 distinct recipient NPIs. Public Medicare Part D data also shows 17 claims for Xtandi by this doctor in 2024.

Astellas Pharma US 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 Xtandi as an associated drug or biological on 11345 records involving 5418 distinct recipient NPIs. Public Medicare Part D data also shows 17 claims for Xtandi 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 CALQUENCE as an associated drug or biological on 8404 records involving 3935 distinct recipient NPIs. Public Medicare Part D data also shows 21 claims for Calquence 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 TAGRISSO as an associated drug or biological on 5285 records involving 2776 distinct recipient NPIs. Public Medicare Part D data also shows 21 claims for Tagrisso by this doctor in 2024.

BeOne Medicines USA, 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 BRUKINSA as an associated drug or biological on 10251 records involving 4941 distinct recipient NPIs. Public Medicare Part D data also shows 28 claims for Brukinsa 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 57 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 XTANDI as an associated drug or biological on 19368 records involving 7657 distinct recipient NPIs. Public Medicare Part D data also shows 17 claims for Xtandi by this doctor in 2024.

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

Payment overview · 2025

General Payments

$728.28

35 reported records · 10 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 $231.0331.7%202025
AstraZeneca Pharmaceuticals LP Unresolved — no canonical attribution shown $158.3721.8%32025
Caris MPI, Inc. Unresolved — no canonical attribution shown $140.7719.3%22025
BeOne Medicines USA, Inc. Unresolved — no canonical attribution shown $52.157.2%22025
ABBVIE INC. Unresolved — no canonical attribution shown $43.496.0%22025
Astellas Pharma US Inc Unresolved — no canonical attribution shown $31.224.3%22025
Bayer Healthcare Pharmaceuticals Inc. Unresolved — no canonical attribution shown $22.423.1%12025
ARRAY BIOPHARMA INC Unresolved — no canonical attribution shown $18.302.5%12025
EMD Serono, Inc. Unresolved — no canonical attribution shown $15.622.1%12025
GlaxoSmithKline, LLC. Unresolved — no canonical attribution shown $14.912.0%12025

What were the payments for?

Payment categories

CategoryAmountRecords
Food and Beverage$553.6218
Education$174.6617

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
IBRANCE
Normalized: ibrance
Drug PFIZER INC. $174.66 17 2025
Source payment records
MI CANCER SEEK
Normalized: mi cancer seek
Device Caris MPI, Inc. $140.77 2 2025
Source payment records
CALQUENCE
Normalized: calquence
Drug AstraZeneca Pharmaceuticals LP $124.97 1 2025
Source payment records
EPKINLY
Normalized: epkinly
Drug ABBVIE INC. $43.49 2 2025
Source payment records
IMBRUVICA
Normalized: imbruvica
Drug ABBVIE INC. $43.49 2 2025
Source payment records
ELIQUIS
Normalized: eliquis
Drug PFIZER INC. $37.10 2 2025
Source payment records
NURTEC ODT
Normalized: nurtec odt
Drug PFIZER INC. $37.10 2 2025
Source payment records
Vyloy
Normalized: vyloy
Drug Astellas Pharma US Inc $31.22 2 2025
Source payment records
BRUKINSA
Normalized: brukinsa
Drug BeOne Medicines USA, Inc. $26.22 1 2025
Source payment records
TEVIMBRA
Normalized: tevimbra
Drug BeOne Medicines USA, Inc. $25.93 1 2025
Source payment records
Nubeqa
Normalized: nubeqa
Drug Bayer Healthcare Pharmaceuticals Inc. $22.42 1 2025
Source payment records
Xofigo
Normalized: xofigo
Drug Bayer Healthcare Pharmaceuticals Inc. $22.42 1 2025
Source payment records
ADCETRIS
Normalized: adcetris
Biological PFIZER INC. $19.27 1 2025
Source payment records
ELREXFIO
Normalized: elrexfio
Drug PFIZER INC. $19.27 1 2025
Source payment records
INLYTA
Normalized: inlyta
Drug PFIZER INC. $19.27 1 2025
Source payment records
PADCEV
Normalized: padcev
Biological PFIZER INC. $19.27 1 2025
Source payment records
BRAFTOVI
Normalized: braftovi
Drug ARRAY BIOPHARMA INC $18.30 1 2025
Source payment records
LORBRENA
Normalized: lorbrena
Drug ARRAY BIOPHARMA INC $18.30 1 2025
Source payment records
MEKTOVI
Normalized: mektovi
Drug ARRAY BIOPHARMA INC $18.30 1 2025
Source payment records
XALKORI
Normalized: xalkori
Drug ARRAY BIOPHARMA INC $18.30 1 2025
Source payment records
OJJAARA
Normalized: ojjaara
Drug GlaxoSmithKline, LLC. $14.91 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
BRUKINSA
brukinsa
2025 Brukinsa 2024 28
Beneficiary count suppressed
exact normalized Medicare Part D
CALQUENCE
calquence
2025 Calquence 2024 21
Beneficiary count suppressed
exact normalized Medicare Part D
ELIQUIS
eliquis
2025 Eliquis 2024 57
Beneficiary count suppressed
exact normalized Medicare Part D
IMBRUVICA
imbruvica
2025 Imbruvica 2024 54
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 IMBRUVICA
open payments reported associated product
CMS Open Payments — General Payments
15599 supporting records · 6881 recipient NPIs · example record 1201352838
Imbruvica · 2024
Exact normalized brand match · 1 Part D row
54 suppressed by CMS
ABBVIE INC.
Exact reporting entity; no affiliate inference
2025 VENCLEXTA
open payments reported associated product
CMS Open Payments — General Payments
10417 supporting records · 4944 recipient NPIs · example record 1201353144
Venclexta · 2024
Exact normalized brand match · 1 Part D row
27 suppressed by CMS
ARRAY BIOPHARMA INC
Exact reporting entity; no affiliate inference
2025 XTANDI
open payments reported associated product
CMS Open Payments — General Payments
98 supporting records · 88 recipient NPIs · example record 1228800820
Xtandi · 2024
Exact normalized brand match · 1 Part D row
17 suppressed by CMS
Astellas Pharma US Inc
Exact reporting entity; no affiliate inference
2025 Xtandi
open payments reported associated product
CMS Open Payments — General Payments
11345 supporting records · 5418 recipient NPIs · example record 1238560686
Xtandi · 2024
Exact normalized brand match · 1 Part D row
17 suppressed by CMS
AstraZeneca Pharmaceuticals LP
Exact reporting entity; no affiliate inference
2025 CALQUENCE
open payments reported associated product
CMS Open Payments — General Payments
8404 supporting records · 3935 recipient NPIs · example record 1206131382
Calquence · 2024
Exact normalized brand match · 1 Part D row
21 suppressed by CMS
AstraZeneca Pharmaceuticals LP
Exact reporting entity; no affiliate inference
2025 TAGRISSO
open payments reported associated product
CMS Open Payments — General Payments
5285 supporting records · 2776 recipient NPIs · example record 1206131546
Tagrisso · 2024
Exact normalized brand match · 1 Part D row
21 suppressed by CMS
BeOne Medicines USA, Inc.
Exact reporting entity; no affiliate inference
2025 BRUKINSA
open payments reported associated product
CMS Open Payments — General Payments
10251 supporting records · 4941 recipient NPIs · example record 1202883638
Brukinsa · 2024
Exact normalized brand match · 1 Part D row
28 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
57 suppressed by CMS
PFIZER INC.
Exact reporting entity; no affiliate inference
2025 XTANDI
open payments reported associated product
CMS Open Payments — General Payments
19368 supporting records · 7657 recipient NPIs · example record 1228794230
Xtandi · 2024
Exact normalized brand match · 1 Part D row
17 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
Oxycodone HclOxycodone Hcl15244
DexamethasoneDexamethasone11639
AnastrozoleAnastrozole11425
Prochlorperazine MaleateProchlorperazine Maleate10662
Potassium ChloridePotassium Chloride10127
HydroxyureaHydroxyurea9721
Ondansetron HclOndansetron Hcl8548
PrednisonePrednisone7125
AcyclovirAcyclovir7012
Tamoxifen CitrateTamoxifen Citrate7018
GabapentinGabapentin58suppressed
EliquisApixaban57suppressed
ImbruvicaIbrutinib54suppressed
Lidocaine-PrilocaineLidocaine/Prilocaine5239
Levothyroxine SodiumLevothyroxine Sodium5013
Ondansetron OdtOndansetron5029
LevofloxacinLevofloxacin4944
XareltoRivaroxaban46suppressed
Morphine Sulfate ErMorphine Sulfate4511
Hydrocodone-AcetaminophenHydrocodone/Acetaminophen4415
ExemestaneExemestane43suppressed
RevlimidLenalidomide38suppressed
OlanzapineOlanzapine3413
BrukinsaZanubrutinib28suppressed
LorazepamLorazepam2811
VenclextaVenetoclax27suppressed
Diphenoxylate-AtropineDiphenoxylate Hcl/Atropine26suppressed
LetrozoleLetrozole26suppressed
LenalidomideLenalidomide23suppressed
CalquenceAcalabrutinib Maleate21suppressed
FurosemideFurosemide21suppressed
Sulfamethoxazole-TrimethoprimSulfamethoxazole/Trimethoprim21suppressed
TagrissoOsimertinib Mesylate21suppressed
Doxycycline HyclateDoxycycline Hyclate19suppressed
PomalystPomalidomide17suppressed
XtandiEnzalutamide17suppressed
AlprazolamAlprazolam16suppressed
OmeprazoleOmeprazole16suppressed
TasignaNilotinib Hcl16suppressed
Warfarin SodiumWarfarin Sodium16suppressed
Citalopram HbrCitalopram Hydrobromide14suppressed
Pantoprazole SodiumPantoprazole Sodium14suppressed
Tramadol HclTramadol Hcl14suppressed
Tamsulosin HclTamsulosin Hcl13suppressed
AllopurinolAllopurinol12suppressed
Amitriptyline HclAmitriptyline Hcl12suppressed
ClonazepamClonazepam12suppressed
Escitalopram OxalateEscitalopram Oxalate12suppressed
InrebicFedratinib Dihydrochloride12suppressed
Hydroxyzine HclHydroxyzine Hcl11suppressed
LenvimaLenvatinib Mesylate11suppressed
PromactaEltrombopag Olamine11suppressed

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 $728.28 · 35 records PFIZER INC. ADCETRIS, BRAFTOVI, BRUKINSA, CALQUENCE, ELIQUIS, ELREXFIO, EPKINLY, IBRANCE, IMBRUVICA, INLYTA, LORBRENA, MEKTOVI, MI CANCER SEEK, NURTEC ODT, Nubeqa, OJJAARA, PADCEV, TEVIMBRA, Vyloy, XALKORI, Xofigo 9
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