Healthcare provider profile · identity verified

Stephen Ac Parnell, M.D.

Allopathic & Osteopathic Physicians|Internal Medicine|Gastroenterology · INGLEWOOD, CA · NPI 1609968320

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 Stephen Ac Parnell, M.D. received $3,614.16 in general payments during 2025 across 74 reported records.

Madrigal Pharmaceuticals accounted for 53.3% of that reported general-payment amount.

The Open Payments records used for this analysis explicitly named 14 associated products.

A separate comparison found the same explicitly named product in public Medicare Part D data: Creon, Linzess, Viberzi, Xifaxan.

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 CREON as an associated drug or biological on 91561 records involving 20616 distinct recipient NPIs. Public Medicare Part D data also shows 14 claims for Creon 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 LINZESS as an associated drug or biological on 87954 records involving 21815 distinct recipient NPIs. Public Medicare Part D data also shows 35 claims for Linzess 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 VIBERZI as an associated drug or biological on 11354 records involving 5020 distinct recipient NPIs. Public Medicare Part D data also shows 15 claims for Viberzi 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 14 claims for Ozempic by this doctor in 2024.

Salix Pharmaceuticals, a division of Bausch Health US, 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 TRULANCE as an associated drug or biological on 2652 records involving 1501 distinct recipient NPIs. Public Medicare Part D data also shows 14 claims for Trulance by this doctor in 2024.

Salix Pharmaceuticals, a division of Bausch Health US, 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 XIFAXAN as an associated drug or biological on 101901 records involving 33018 distinct recipient NPIs. Public Medicare Part D data also shows 30 claims for Xifaxan by this doctor in 2024.

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

Payment overview · 2025

General Payments

$3,614.16

74 reported records · 9 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
Madrigal Pharmaceuticals Unresolved — no canonical attribution shown $1,924.8553.3%52025
ABBVIE INC. Unresolved — no canonical attribution shown $674.0618.6%252025
Salix Pharmaceuticals, a division of Bausch Health US, LLC Unresolved — no canonical attribution shown $370.6110.2%152025
PFIZER INC. Unresolved — no canonical attribution shown $335.329.3%162025
Janssen Biotech, Inc. Unresolved — no canonical attribution shown $167.234.6%82025
GENZYME CORPORATION Unresolved — no canonical attribution shown $75.952.1%22025
RedHill Biopharma Inc. Unresolved — no canonical attribution shown $23.650.7%12025
Celltrion USA Inc. Unresolved — no canonical attribution shown $22.270.6%12025
Novo Nordisk Inc Unresolved — no canonical attribution shown $20.220.6%12025

What were the payments for?

Payment categories

CategoryAmountRecords
Food and Beverage$1,947.4973
Grant$1,666.671

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
SKYRIZI
Normalized: skyrizi
Biological ABBVIE INC. $641.44 22 2025
Source payment records
RINVOQ
Normalized: rinvoq
Biological ABBVIE INC. $381.46 18 2025
Source payment records
XIFAXAN
Normalized: xifaxan
Drug Salix Pharmaceuticals, a division of Bausch Health US, LLC $370.61 15 2025
Source payment records
  • 2025-01-10 · Salix Pharmaceuticals, a division of Bausch Health US, LLC · $16.46 · Open Payments source
  • 2025-02-05 · Salix Pharmaceuticals, a division of Bausch Health US, LLC · $8.62 · Open Payments source
  • 2025-02-12 · Salix Pharmaceuticals, a division of Bausch Health US, LLC · $22.66 · Open Payments source
  • 2025-02-18 · Salix Pharmaceuticals, a division of Bausch Health US, LLC · $23.96 · Open Payments source
  • 2025-03-04 · Salix Pharmaceuticals, a division of Bausch Health US, LLC · $17.03 · Open Payments source
  • 2025-03-21 · Salix Pharmaceuticals, a division of Bausch Health US, LLC · $24.35 · Open Payments source
  • 2025-04-28 · Salix Pharmaceuticals, a division of Bausch Health US, LLC · $21.34 · Open Payments source
  • 2025-05-13 · Salix Pharmaceuticals, a division of Bausch Health US, LLC · $125.00 · Open Payments source
  • 2025-06-30 · Salix Pharmaceuticals, a division of Bausch Health US, LLC · $16.39 · Open Payments source
  • 2025-10-08 · Salix Pharmaceuticals, a division of Bausch Health US, LLC · $19.08 · Open Payments source
  • 2025-10-08 · Salix Pharmaceuticals, a division of Bausch Health US, LLC · $9.70 · Open Payments source
  • 2025-10-20 · Salix Pharmaceuticals, a division of Bausch Health US, LLC · $19.12 · Open Payments source
  • 2025-10-20 · Salix Pharmaceuticals, a division of Bausch Health US, LLC · $4.21 · Open Payments source
  • 2025-12-01 · Salix Pharmaceuticals, a division of Bausch Health US, LLC · $22.52 · Open Payments source
  • 2025-12-22 · Salix Pharmaceuticals, a division of Bausch Health US, LLC · $20.17 · Open Payments source
VELSIPITY
Normalized: velsipity
Drug PFIZER INC. $335.32 16 2025
Source payment records
REZDIFFRA
Normalized: rezdiffra
Drug Madrigal Pharmaceuticals $258.18 4 2025
Source payment records
XELJANZ
Normalized: xeljanz
Drug PFIZER INC. $251.87 12 2025
Source payment records
TREMFYA
Normalized: tremfya
Drug Janssen Biotech, Inc. $167.23 8 2025
Source payment records
DUPIXENT
Normalized: dupixent
Biological GENZYME CORPORATION $75.95 2 2025
Source payment records
CREON
Normalized: creon
Drug ABBVIE INC. $30.42 2 2025
Source payment records
VIBERZI
Normalized: viberzi
Drug ABBVIE INC. $30.42 2 2025
Source payment records
Talicia
Normalized: talicia
Drug RedHill Biopharma Inc. $23.65 1 2025
Source payment records
VEGZELMA
Normalized: vegzelma
Biological Celltrion USA Inc. $22.27 1 2025
Source payment records
Wegovy
Normalized: wegovy
Drug Novo Nordisk Inc $20.22 1 2025
Source payment records
LINZESS
Normalized: linzess
Drug ABBVIE INC. $2.20 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
CREON
creon
2025 Creon 2024 14
Beneficiary count suppressed
exact normalized Medicare Part D
LINZESS
linzess
2025 Linzess 2024 35
Beneficiary count suppressed
exact normalized Medicare Part D
VIBERZI
viberzi
2025 Viberzi 2024 15
Beneficiary count suppressed
exact normalized Medicare Part D
XIFAXAN
xifaxan
2025 Xifaxan 2024 30
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 CREON
open payments reported associated product
CMS Open Payments — General Payments
91561 supporting records · 20616 recipient NPIs · example record 1201352608
Creon · 2024
Exact normalized brand match · 1 Part D row
14 suppressed by CMS
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
35 suppressed by CMS
ABBVIE INC.
Exact reporting entity; no affiliate inference
2025 VIBERZI
open payments reported associated product
CMS Open Payments — General Payments
11354 supporting records · 5020 recipient NPIs · example record 1201352948
Viberzi · 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
14 suppressed by CMS
Salix Pharmaceuticals, a division of Bausch Health US, LLC
Exact reporting entity; no affiliate inference
2025 TRULANCE
open payments reported associated product
CMS Open Payments — General Payments
2652 supporting records · 1501 recipient NPIs · example record 1231775445
Trulance · 2024
Exact normalized brand match · 1 Part D row
14 suppressed by CMS
Salix Pharmaceuticals, a division of Bausch Health US, LLC
Exact reporting entity; no affiliate inference
2025 XIFAXAN
open payments reported associated product
CMS Open Payments — General Payments
101901 supporting records · 33018 recipient NPIs · example record 1231775337
Xifaxan · 2024
Exact normalized brand match · 1 Part D row
30 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
Sod Sulf-Potass Sulf-Mag SulfSodium, Potassium,mag Sulfates276270
OmeprazoleOmeprazole13656
Pantoprazole SodiumPantoprazole Sodium11738
Gavilyte-GPeg3350/Sod Sulf,bicarb,cl/Kcl102100
FamotidineFamotidine4717
Atorvastatin CalciumAtorvastatin Calcium36suppressed
Peg-3350 And ElectrolytesPeg3350/Sod Sulf,bicarb,cl/Kcl3636
LinzessLinaclotide35suppressed
AlprazolamAlprazolam34suppressed
Metoclopramide HclMetoclopramide Hcl31suppressed
XifaxanRifaximin30suppressed
MesalamineMesalamine24suppressed
Amlodipine BesylateAmlodipine Besylate18suppressed
DexilantDexlansoprazole17suppressed
Dexlansoprazole DrDexlansoprazole16suppressed
ViberziEluxadoline15suppressed
CreonLipase/Protease/Amylase14suppressed
JanuviaSitagliptin Phosphate14suppressed
OzempicSemaglutide14suppressed
TrulancePlecanatide14suppressed
MetronidazoleMetronidazole13suppressed
Ondansetron HclOndansetron Hcl13suppressed
Cyclobenzaprine HclCyclobenzaprine Hcl12suppressed
Gavilyte-CPeg3350/Sod Sulf,bicarb,cl/Kcl1212
LisinoprilLisinopril12suppressed
Mesalamine ErMesalamine12suppressed
MounjaroTirzepatide12suppressed
Sofosbuvir-VelpatasvirSofosbuvir/Velpatasvir12suppressed
ZeposiaOzanimod Hydrochloride12suppressed
Clotrimazole-BetamethasoneClotrimazole/Betamethasone Dip11suppressed
MercaptopurineMercaptopurine11suppressed
SucralfateSucralfate11suppressed

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 $3,614.16 · 74 records Madrigal Pharmaceuticals CREON, DUPIXENT, LINZESS, REZDIFFRA, RINVOQ, SKYRIZI, TREMFYA, Talicia, VEGZELMA, VELSIPITY, VIBERZI, Wegovy, XELJANZ, XIFAXAN 6
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