IndustryPayments
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 CHANG-YUEN CHEN

Allopathic & Osteopathic Physicians Internal Medicine Gastroenterology

NPI
1366837890
CMS profile
5561930
Location
SAN DIEGO, CA

General Payments · PY2019–2024

$2,866.18

  • Reported across 122 records
  • CMS publication 2026-01-23

Latest program year · PY2024

$1,621.60

78 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.

Related groups: Gastroenterology CA All categories

By nature of payment

PY2024 · sorted by reported total

Nature of paymentAmountRecords
Food and Beverage $1,610.01 77
Education $11.59 1

By paying entity

PY2024 · sorted by reported total

Paying entityAmountRecords
ABBVIE INC. $330.91 18
Takeda Pharmaceuticals U.S.A., Inc. $256.40 11
Salix Pharmaceuticals, a division of Bausch Health US, LLC $197.74 12
Janssen Biotech, Inc. $149.18 7
GENZYME CORPORATION $108.30 3
Regeneron Healthcare Solutions, Inc. $96.71 3
PFIZER INC. $80.98 4
INTERCEPT PHARMACEUTICALS, INC. $67.60 3
Gilead Sciences, Inc. $60.85 4
Lilly USA, LLC $58.26 2
VIVUS LLC $49.27 3
QOL Medical, LLC $29.97 2
EVOKE PHARMA, INC. $27.77 1
AIMMUNE THERAPEUTICS, INC. $23.02 1
Phathom Pharmaceuticals, Inc. $22.60 1
Ardelyx, Inc. $21.82 1
Celltrion USA Inc. $21.70 1
Ipsen Biopharmaceuticals, Inc $18.52 1

By program year

All program years on this page · sorted by year

Program yearAmountRecords
PY2019 $13.16 1
PY2021 $120.53 2
PY2022 $210.44 6
PY2023 $900.45 35
PY2024 $1,621.60 78

Payment records · PY2024 (78)

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

Program year 2024 2019202120222023 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. $19.81 01/09/2024 Food and Beverage Undisputed 01/23/2026 1103454052 CMS
ABBVIE INC. $26.90 01/23/2024 Food and Beverage Undisputed 01/23/2026 1103454054 CMS
ABBVIE INC. $21.82 03/12/2024 Food and Beverage Undisputed 01/23/2026 1103454056 CMS
ABBVIE INC. $6.32 03/26/2024 Food and Beverage Undisputed 01/23/2026 1103454058 CMS
ABBVIE INC. $19.34 04/18/2024 Food and Beverage Undisputed 01/23/2026 1103454060 CMS
ABBVIE INC. $8.77 05/15/2024 Food and Beverage Undisputed 01/23/2026 1103454062 CMS
ABBVIE INC. $15.22 05/28/2024 Food and Beverage Undisputed 01/23/2026 1103454064 CMS
ABBVIE INC. $24.59 05/30/2024 Food and Beverage Undisputed 01/23/2026 1103454066 CMS
ABBVIE INC. $20.67 06/18/2024 Food and Beverage Undisputed 01/23/2026 1103454068 CMS
ABBVIE INC. $8.27 07/02/2024 Food and Beverage Undisputed 01/23/2026 1103454070 CMS
ABBVIE INC. $21.51 07/18/2024 Food and Beverage Undisputed 01/23/2026 1103454072 CMS
ABBVIE INC. $20.20 08/15/2024 Food and Beverage Undisputed 01/23/2026 1103454074 CMS
ABBVIE INC. $7.97 09/10/2024 Food and Beverage Undisputed 01/23/2026 1103454076 CMS
ABBVIE INC. $34.54 10/01/2024 Food and Beverage Undisputed 01/23/2026 1103454078 CMS
ABBVIE INC. $25.19 10/17/2024 Food and Beverage Undisputed 01/23/2026 1103454080 CMS
ABBVIE INC. $12.04 11/08/2024 Food and Beverage Undisputed 01/23/2026 1103454082 CMS
ABBVIE INC. $31.63 11/14/2024 Food and Beverage Undisputed 01/23/2026 1103454084 CMS
ABBVIE INC. $6.12 12/11/2024 Food and Beverage Undisputed 01/23/2026 1103454086 CMS
AIMMUNE THERAPEUTICS, INC. $23.02 12/10/2024 Food and Beverage Undisputed 01/23/2026 1146997482 CMS
Ardelyx, Inc. $21.82 09/03/2024 Food and Beverage Undisputed 01/23/2026 1146675082 CMS
Celltrion USA Inc. $21.70 10/01/2024 Food and Beverage Undisputed 01/23/2026 1075849681 CMS
EVOKE PHARMA, INC. $27.77 09/17/2024 Food and Beverage Undisputed 01/23/2026 1127778489 CMS
GENZYME CORPORATION $27.28 01/30/2024 Food and Beverage Undisputed 01/23/2026 1139976985 CMS
GENZYME CORPORATION $42.37 09/10/2024 Food and Beverage Undisputed 01/23/2026 1139977005 CMS
GENZYME CORPORATION $38.65 12/03/2024 Food and Beverage Undisputed 01/23/2026 1139977021 CMS
Gilead Sciences, Inc. $16.04 01/11/2024 Food and Beverage Undisputed 01/23/2026 1133791443 CMS
Gilead Sciences, Inc. $16.61 04/11/2024 Food and Beverage Undisputed 01/23/2026 1133791445 CMS
Gilead Sciences, Inc. $16.61 12/05/2024 Food and Beverage Undisputed 01/23/2026 1133791447 CMS
Gilead Sciences, Inc. $11.59 12/05/2024 Education Undisputed 01/23/2026 1133891117 CMS
Intercept Pharmaceuticals, Inc. $23.39 03/19/2024 Food and Beverage Undisputed 01/23/2026 1113644485 CMS
Intercept Pharmaceuticals, Inc. $23.03 04/23/2024 Food and Beverage Undisputed 01/23/2026 1113644489 CMS
Intercept Pharmaceuticals, Inc. $21.18 05/23/2024 Food and Beverage Undisputed 01/23/2026 1113644487 CMS
Ipsen Biopharmaceuticals, Inc $18.52 01/15/2024 Food and Beverage Undisputed 01/23/2026 1091968957 CMS
Janssen Biotech, Inc. $10.91 01/19/2024 Food and Beverage Undisputed 01/23/2026 1078325862 CMS
Janssen Biotech, Inc. $33.32 04/02/2024 Food and Beverage Undisputed 01/23/2026 1078326012 CMS
Janssen Biotech, Inc. $26.30 05/15/2024 Food and Beverage Undisputed 01/23/2026 1078329800 CMS
Janssen Biotech, Inc. $24.39 06/03/2024 Food and Beverage Undisputed 01/23/2026 1078326542 CMS
Janssen Biotech, Inc. $23.43 10/15/2024 Food and Beverage Undisputed 01/23/2026 1078328974 CMS
Janssen Biotech, Inc. $8.19 11/20/2024 Food and Beverage Undisputed 01/23/2026 1078326293 CMS
Janssen Biotech, Inc. $22.64 12/10/2024 Food and Beverage Undisputed 01/23/2026 1078327238 CMS
Lilly USA, LLC $26.69 01/02/2024 Food and Beverage Undisputed 01/23/2026 1135505622 CMS
Lilly USA, LLC $31.57 07/30/2024 Food and Beverage Undisputed 01/23/2026 1135441937 CMS
PFIZER INC. $26.49 01/18/2024 Food and Beverage Undisputed 01/23/2026 1131104042 CMS
PFIZER INC. $14.43 04/03/2024 Food and Beverage Undisputed 01/23/2026 1131349188 CMS
PFIZER INC. $16.28 05/08/2024 Food and Beverage Undisputed 01/23/2026 1131490259 CMS
PFIZER INC. $23.78 09/05/2024 Food and Beverage Undisputed 01/23/2026 1131986701 CMS
Phathom Pharmaceuticals, Inc. $22.60 10/29/2024 Food and Beverage Undisputed 01/23/2026 1151049016 CMS
QOL Medical, LLC $15.00 10/31/2024 Food and Beverage Undisputed 01/23/2026 1147718137 CMS
QOL Medical, LLC $14.97 11/21/2024 Food and Beverage Undisputed 01/23/2026 1147718139 CMS
Regeneron Healthcare Solutions, Inc. $28.17 03/26/2024 Food and Beverage Undisputed 01/23/2026 1114023624 CMS
Regeneron Healthcare Solutions, Inc. $39.61 08/22/2024 Food and Beverage Undisputed 01/23/2026 1114023626 CMS
Regeneron Healthcare Solutions, Inc. $28.93 11/07/2024 Food and Beverage Undisputed 01/23/2026 1114023628 CMS
Salix Pharmaceuticals, a division of Bausch Health US, LLC $19.23 01/11/2024 Food and Beverage Undisputed 01/23/2026 1153466099 CMS
Salix Pharmaceuticals, a division of Bausch Health US, LLC $14.39 01/31/2024 Food and Beverage Undisputed 01/23/2026 1153502470 CMS
Salix Pharmaceuticals, a division of Bausch Health US, LLC $7.53 04/08/2024 Food and Beverage Undisputed 01/23/2026 1153536644 CMS
Salix Pharmaceuticals, a division of Bausch Health US, LLC $15.61 04/08/2024 Food and Beverage Undisputed 01/23/2026 1153579011 CMS
Salix Pharmaceuticals, a division of Bausch Health US, LLC $14.09 05/07/2024 Food and Beverage Undisputed 01/23/2026 1153410429 CMS
Salix Pharmaceuticals, a division of Bausch Health US, LLC $9.79 06/24/2024 Food and Beverage Undisputed 01/23/2026 1153489723 CMS
Salix Pharmaceuticals, a division of Bausch Health US, LLC $9.74 07/10/2024 Food and Beverage Undisputed 01/23/2026 1153522020 CMS
Salix Pharmaceuticals, a division of Bausch Health US, LLC $24.21 07/24/2024 Food and Beverage Undisputed 01/23/2026 1153572622 CMS
Salix Pharmaceuticals, a division of Bausch Health US, LLC $23.64 08/05/2024 Food and Beverage Undisputed 01/23/2026 1153709826 CMS
Salix Pharmaceuticals, a division of Bausch Health US, LLC $21.24 08/21/2024 Food and Beverage Undisputed 01/23/2026 1153468827 CMS
Salix Pharmaceuticals, a division of Bausch Health US, LLC $16.70 09/18/2024 Food and Beverage Undisputed 01/23/2026 1153500201 CMS
Salix Pharmaceuticals, a division of Bausch Health US, LLC $21.57 09/26/2024 Food and Beverage Undisputed 01/23/2026 1153679622 CMS
Takeda Pharmaceuticals U.S.A., Inc. $32.75 01/04/2024 Food and Beverage Undisputed 01/23/2026 1137509455 CMS
Takeda Pharmaceuticals U.S.A., Inc. $25.38 02/20/2024 Food and Beverage Undisputed 01/23/2026 1137509459 CMS
Takeda Pharmaceuticals U.S.A., Inc. $33.07 03/21/2024 Food and Beverage Undisputed 01/23/2026 1137509462 CMS
Takeda Pharmaceuticals U.S.A., Inc. $28.32 05/30/2024 Food and Beverage Undisputed 01/23/2026 1137509466 CMS
Takeda Pharmaceuticals U.S.A., Inc. $8.24 07/10/2024 Food and Beverage Undisputed 01/23/2026 1137509470 CMS
Takeda Pharmaceuticals U.S.A., Inc. $20.92 08/20/2024 Food and Beverage Undisputed 01/23/2026 1137509474 CMS
Takeda Pharmaceuticals U.S.A., Inc. $9.35 10/02/2024 Food and Beverage Undisputed 01/23/2026 1137509478 CMS
Takeda Pharmaceuticals U.S.A., Inc. $30.27 10/08/2024 Food and Beverage Undisputed 01/23/2026 1137509481 CMS
Takeda Pharmaceuticals U.S.A., Inc. $8.72 11/04/2024 Food and Beverage Undisputed 01/23/2026 1137509485 CMS
Takeda Pharmaceuticals U.S.A., Inc. $27.89 11/19/2024 Food and Beverage Undisputed 01/23/2026 1137509489 CMS
Takeda Pharmaceuticals U.S.A., Inc. $31.49 12/12/2024 Food and Beverage Undisputed 01/23/2026 1137509493 CMS
VIVUS LLC $16.06 02/13/2024 Food and Beverage Undisputed 01/23/2026 1129415074 CMS
VIVUS LLC $16.55 07/02/2024 Food and Beverage Undisputed 01/23/2026 1129415076 CMS
VIVUS LLC $16.66 08/27/2024 Food and Beverage Undisputed 01/23/2026 1129415078 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
2019, 2021, 2022, 2023, 2024
Source files
Dataset page · Bulk file · PY2019 , PY2021 , PY2022 , PY2023 , PY2024
Generated from
OP_DTL_GNRL_PGYR2024_P01232026_01102026.csv

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