Official source Data mirrored from Centers for Medicare & Medicaid Services Open Payments · General Payments · as published 2026-01-23 View official record Methodology

Covered recipient · General Payments record

WILLIAM N STASSEN

Allopathic & Osteopathic Physicians Internal Medicine Gastroenterology

NPI
1548245079
CMS profile
341924
Location
AUSTIN, TX

General Payments · PY2018–2024

$12,889.91

  • Reported across 848 records
  • CMS publication 2026-01-23

Latest program year · PY2024

$1,152.73

60 records · 0 disputed

Financial relationships do not necessarily indicate an improper relationship; the data is open to interpretation.

How these totals are calculated
  • The total is the sum of the General Payments records CMS published for the labeled program year(s), exactly as published. Nothing is estimated, weighted, or combined across categories.
  • General Payments only. Research and Ownership/Investment are separate datasets and are never summed with these figures; amounts are kept separate per program year.
  • Featured-page threshold (a presentation gate, not a judgment): records>=3 OR total>=100 (all years).
  • Methodology & Data — sourcing, labeling, and limitations.

By nature of payment

PY2024 · sorted by reported total

Nature of paymentAmountRecords
Food and Beverage $1,117.88 58
Education $34.85 2

By paying entity

PY2024 · sorted by reported total

By program year

All program years on this page · sorted by year

Program yearAmountRecords
PY2018 $2,338.71 189
PY2019 $2,456.41 181
PY2020 $946.17 54
PY2021 $1,767.22 119
PY2022 $2,089.17 121
PY2023 $2,139.50 124
PY2024 $1,152.73 60

Payment records · PY2024 (60)

Sorted by paying entity, then date · as published by CMS

Program year 2024 201820192020202120222023 Record-level detail is published for PY2024; earlier years are summarised in “By program year”.
Paying entity Amount Date Nature of payment Dispute status Published Record ID Source
ABBVIE INC. $18.38 01/26/2024 Food and Beverage Undisputed 01/23/2026 1106155241 CMS
ABBVIE INC. $13.54 01/30/2024 Food and Beverage Undisputed 01/23/2026 1106155243 CMS
ABBVIE INC. $14.13 02/06/2024 Food and Beverage Undisputed 01/23/2026 1106155245 CMS
ABBVIE INC. $25.00 02/09/2024 Food and Beverage Undisputed 01/23/2026 1106155247 CMS
ABBVIE INC. $19.55 03/01/2024 Food and Beverage Undisputed 01/23/2026 1106155249 CMS
ABBVIE INC. $18.57 03/07/2024 Food and Beverage Undisputed 01/23/2026 1106155251 CMS
ABBVIE INC. $19.55 03/14/2024 Food and Beverage Undisputed 01/23/2026 1106155253 CMS
ABBVIE INC. $3.44 04/02/2024 Food and Beverage Undisputed 01/23/2026 1106155255 CMS
ABBVIE INC. $16.25 04/02/2024 Food and Beverage Undisputed 01/23/2026 1106155257 CMS
ABBVIE INC. $6.91 04/08/2024 Food and Beverage Undisputed 01/23/2026 1106155259 CMS
ABBVIE INC. $20.93 04/25/2024 Food and Beverage Undisputed 01/23/2026 1106155261 CMS
ABBVIE INC. $12.35 05/02/2024 Food and Beverage Undisputed 01/23/2026 1106155263 CMS
ABBVIE INC. $25.01 05/09/2024 Food and Beverage Undisputed 01/23/2026 1106155265 CMS
ABBVIE INC. $24.19 05/22/2024 Food and Beverage Undisputed 01/23/2026 1106155267 CMS
ABBVIE INC. $16.14 06/05/2024 Food and Beverage Undisputed 01/23/2026 1106155269 CMS
ABBVIE INC. $19.99 06/12/2024 Food and Beverage Undisputed 01/23/2026 1106155271 CMS
ABBVIE INC. $27.77 06/12/2024 Food and Beverage Undisputed 01/23/2026 1106155273 CMS
ABBVIE INC. $3.14 06/20/2024 Food and Beverage Undisputed 01/23/2026 1106155275 CMS
ABBVIE INC. $19.89 06/20/2024 Food and Beverage Undisputed 01/23/2026 1106155277 CMS
ABBVIE INC. $31.53 06/29/2024 Food and Beverage Undisputed 01/23/2026 1106155279 CMS
AIMMUNE THERAPEUTICS, INC. $18.81 01/24/2024 Food and Beverage Undisputed 01/23/2026 1147019602 CMS
AIMMUNE THERAPEUTICS, INC. $17.73 02/22/2024 Food and Beverage Undisputed 01/23/2026 1147019768 CMS
Ardelyx, Inc. $13.07 01/09/2024 Food and Beverage Undisputed 01/23/2026 1146709428 CMS
Celgene Corporation $34.07 05/15/2024 Food and Beverage Undisputed 01/23/2026 1101166230 CMS
Celgene Corporation $30.24 05/16/2024 Food and Beverage Undisputed 01/23/2026 1101166232 CMS
Celltrion USA Inc. $16.97 03/18/2024 Education Undisputed 01/23/2026 1075858623 CMS
Celltrion USA Inc. $17.88 04/15/2024 Education Undisputed 01/23/2026 1075858625 CMS
Ferring Pharmaceuticals Inc. $18.12 02/13/2024 Food and Beverage Undisputed 01/23/2026 1137512773 CMS
Ferring Pharmaceuticals Inc. $14.27 03/28/2024 Food and Beverage Undisputed 01/23/2026 1137512777 CMS
GENZYME CORPORATION $14.79 01/31/2024 Food and Beverage Undisputed 01/23/2026 1139887206 CMS
GENZYME CORPORATION $25.58 03/11/2024 Food and Beverage Undisputed 01/23/2026 1139887214 CMS
GENZYME CORPORATION $25.05 04/03/2024 Food and Beverage Undisputed 01/23/2026 1139887222 CMS
GENZYME CORPORATION $13.84 05/31/2024 Food and Beverage Undisputed 01/23/2026 1139887244 CMS
Gilead Sciences, Inc. $21.62 05/07/2024 Food and Beverage Undisputed 01/23/2026 1133787867 CMS
Janssen Biotech, Inc. $19.76 03/08/2024 Food and Beverage Undisputed 01/23/2026 1078686367 CMS
Janssen Biotech, Inc. $19.90 03/19/2024 Food and Beverage Undisputed 01/23/2026 1078691765 CMS
Janssen Biotech, Inc. $18.66 03/25/2024 Food and Beverage Undisputed 01/23/2026 1078684125 CMS
Janssen Biotech, Inc. $18.51 05/06/2024 Food and Beverage Undisputed 01/23/2026 1078692146 CMS
Janssen Biotech, Inc. $17.83 06/18/2024 Food and Beverage Undisputed 01/23/2026 1078689636 CMS
Lilly USA, LLC $45.62 02/21/2024 Food and Beverage Undisputed 01/23/2026 1135478894 CMS
Lilly USA, LLC $21.51 03/21/2024 Food and Beverage Undisputed 01/23/2026 1135504526 CMS
Lilly USA, LLC $16.27 04/19/2024 Food and Beverage Undisputed 01/23/2026 1135498354 CMS
Lilly USA, LLC $25.82 06/25/2024 Food and Beverage Undisputed 01/23/2026 1135504528 CMS
PFIZER INC. $13.35 01/17/2024 Food and Beverage Undisputed 01/23/2026 1131716904 CMS
PFIZER INC. $18.80 02/21/2024 Food and Beverage Undisputed 01/23/2026 1131716802 CMS
PFIZER INC. $13.77 03/18/2024 Food and Beverage Undisputed 01/23/2026 1131713701 CMS
PFIZER INC. $17.37 05/22/2024 Food and Beverage Undisputed 01/23/2026 1131721522 CMS
QOL Medical, LLC $25.57 02/08/2024 Food and Beverage Undisputed 01/23/2026 1147720463 CMS
Regeneron Healthcare Solutions, Inc. $34.21 04/23/2024 Food and Beverage Undisputed 01/23/2026 1114193586 CMS
Salix Pharmaceuticals, a division of Bausch Health US, LLC $21.24 01/10/2024 Food and Beverage Undisputed 01/23/2026 1153595025 CMS
Salix Pharmaceuticals, a division of Bausch Health US, LLC $12.13 02/07/2024 Food and Beverage Undisputed 01/23/2026 1153450041 CMS
Salix Pharmaceuticals, a division of Bausch Health US, LLC $8.37 02/07/2024 Food and Beverage Undisputed 01/23/2026 1153603221 CMS
Salix Pharmaceuticals, a division of Bausch Health US, LLC $4.14 03/20/2024 Food and Beverage Undisputed 01/23/2026 1153517054 CMS
Salix Pharmaceuticals, a division of Bausch Health US, LLC $16.80 03/20/2024 Food and Beverage Undisputed 01/23/2026 1153679482 CMS
Salix Pharmaceuticals, a division of Bausch Health US, LLC $22.16 05/07/2024 Food and Beverage Undisputed 01/23/2026 1153573534 CMS
Salix Pharmaceuticals, a division of Bausch Health US, LLC $9.37 06/26/2024 Food and Beverage Undisputed 01/23/2026 1153464280 CMS
Salix Pharmaceuticals, a division of Bausch Health US, LLC $19.18 07/24/2024 Food and Beverage Undisputed 01/23/2026 1153639072 CMS
Salix Pharmaceuticals, a division of Bausch Health US, LLC $24.41 08/07/2024 Food and Beverage Undisputed 01/23/2026 1153460963 CMS
Takeda Pharmaceuticals U.S.A., Inc. $20.21 02/01/2024 Food and Beverage Undisputed 01/23/2026 1137681455 CMS
Takeda Pharmaceuticals U.S.A., Inc. $29.47 02/15/2024 Food and Beverage Undisputed 01/23/2026 1137681457 CMS

Source & provenance

Dataset
CMS Open Payments — General Payments
Publisher of source data
Centers for Medicare & Medicaid Services
CMS publication date
2026-01-23
Program years on this page
2018, 2019, 2020, 2021, 2022, 2023, 2024
Source files
Dataset page · Bulk file · PY2018 , PY2019 , PY2020 , PY2021 , PY2022 , PY2023 , PY2024
Generated from
OP_DTL_GNRL_PGYR2024_P01232026_01102026.csv

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