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

GWENDOLEN Y CHANG

Allopathic & Osteopathic Physicians Internal Medicine

NPI
1386807402
CMS profile
1228330
Location
SAN LEANDRO, CA

General Payments · PY2018–2024

$3,667.25

  • Reported across 161 records
  • CMS publication 2026-01-23

Latest program year · PY2024

$1,283.92

53 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: Internal Medicine CA All categories

By nature of payment

PY2024 · sorted by reported total

Nature of paymentAmountRecords
Food and Beverage $1,212.13 49
Education $71.79 4

By paying entity

PY2024 · sorted by reported total

Paying entityAmountRecords
NOVARTIS PHARMACEUTICALS CORPORATION $248.59 10
Amgen Inc. $217.16 8
Fresenius USA Marketing, Inc. $162.48 8
Otsuka America Pharmaceutical, Inc. $151.72 6
Ardelyx, Inc. $86.11 3
Relypsa, Inc. $82.87 3
Bayer HealthCare Pharmaceuticals Inc. $64.10 2
OPKO Pharmaceuticals, LLC $52.10 3
Aurinia Pharma U.S., Inc. $48.79 2
Novo Nordisk AS $34.50 2
Retrophin, Inc. $27.13 1
Mallinckrodt Hospital Products Inc. $26.04 1
CALLIDITAS THERAPEUTICS US INC. $25.52 1
Lilly USA, LLC $24.43 1
Acerta Pharma LLC $18.88 1
ANI Pharmaceuticals, Inc. $13.50 1

By program year

All program years on this page · sorted by year

Program yearAmountRecords
PY2018 $134.19 6
PY2019 $100.59 4
PY2020 $526.18 24
PY2021 $79.76 5
PY2022 $518.56 21
PY2023 $1,024.05 48
PY2024 $1,283.92 53

Payment records · PY2024 (53)

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
Amgen Inc. $34.08 01/26/2024 Food and Beverage Undisputed 01/23/2026 1111545953 CMS
Amgen Inc. $6.35 02/23/2024 Food and Beverage Undisputed 01/23/2026 1111545955 CMS
Amgen Inc. $23.92 02/29/2024 Food and Beverage Undisputed 01/23/2026 1111545957 CMS
Amgen Inc. $18.26 03/20/2024 Food and Beverage Undisputed 01/23/2026 1111545959 CMS
Amgen Inc. $31.53 04/19/2024 Food and Beverage Undisputed 01/23/2026 1111545961 CMS
Amgen Inc. $34.91 05/31/2024 Food and Beverage Undisputed 01/23/2026 1111545963 CMS
Amgen Inc. $33.25 06/15/2024 Food and Beverage Undisputed 01/23/2026 1111545965 CMS
Amgen Inc. $34.86 12/16/2024 Food and Beverage Undisputed 01/23/2026 1117221679 CMS
ANI Pharmaceuticals, Inc. $13.50 04/17/2024 Food and Beverage Undisputed 01/23/2026 1091145482 CMS
Ardelyx, Inc. $22.93 01/19/2024 Food and Beverage Undisputed 01/23/2026 1146674634 CMS
Ardelyx, Inc. $32.27 05/07/2024 Food and Beverage Undisputed 01/23/2026 1146674636 CMS
Ardelyx, Inc. $30.91 08/13/2024 Food and Beverage Undisputed 01/23/2026 1146674638 CMS
AstraZeneca Pharmaceuticals LP $18.88 05/22/2024 Food and Beverage Undisputed 01/23/2026 1104421459 CMS
Aurinia Pharma U.S., Inc. $29.10 02/24/2024 Food and Beverage Undisputed 01/23/2026 1150677753 CMS
Aurinia Pharma U.S., Inc. $19.69 06/07/2024 Education Undisputed 01/23/2026 1150677755 CMS
Bayer Healthcare Pharmaceuticals Inc. $34.18 02/17/2024 Food and Beverage Undisputed 01/23/2026 1086124616 CMS
Bayer Healthcare Pharmaceuticals Inc. $29.92 11/01/2024 Food and Beverage Undisputed 01/23/2026 1086204009 CMS
CALLIDITAS THERAPEUTICS US INC. $25.52 03/05/2024 Food and Beverage Undisputed 01/23/2026 1141510697 CMS
Fresenius USA Marketing, Inc. $23.01 03/26/2024 Food and Beverage Undisputed 01/23/2026 1154192603 CMS
Fresenius USA Marketing, Inc. $21.51 05/01/2024 Food and Beverage Undisputed 01/23/2026 1154192599 CMS
Fresenius USA Marketing, Inc. $25.25 06/04/2024 Food and Beverage Undisputed 01/23/2026 1154192609 CMS
Fresenius USA Marketing, Inc. $2.65 08/07/2024 Food and Beverage Undisputed 01/23/2026 1154192595 CMS
Fresenius USA Marketing, Inc. $21.83 08/07/2024 Food and Beverage Undisputed 01/23/2026 1154192601 CMS
Fresenius USA Marketing, Inc. $23.57 08/22/2024 Food and Beverage Undisputed 01/23/2026 1154192607 CMS
Fresenius USA Marketing, Inc. $23.37 09/04/2024 Food and Beverage Undisputed 01/23/2026 1154192605 CMS
Fresenius USA Marketing, Inc. $21.29 12/02/2024 Food and Beverage Undisputed 01/23/2026 1154192597 CMS
Lilly USA, LLC $24.43 04/16/2024 Food and Beverage Undisputed 01/23/2026 1134992746 CMS
Mallinckrodt Hospital Products Inc. $26.04 02/15/2024 Food and Beverage Undisputed 01/23/2026 1145055587 CMS
Novartis Pharmaceuticals Corporation $26.86 01/17/2024 Food and Beverage Undisputed 01/23/2026 1086750775 CMS
Novartis Pharmaceuticals Corporation $14.01 03/29/2024 Food and Beverage Undisputed 01/23/2026 1086750785 CMS
Novartis Pharmaceuticals Corporation $21.00 04/18/2024 Food and Beverage Undisputed 01/23/2026 1086750795 CMS
Novartis Pharmaceuticals Corporation $30.09 05/09/2024 Food and Beverage Undisputed 01/23/2026 1086750797 CMS
Novartis Pharmaceuticals Corporation $21.70 06/28/2024 Food and Beverage Undisputed 01/23/2026 1086750811 CMS
Novartis Pharmaceuticals Corporation $12.10 06/28/2024 Food and Beverage Undisputed 01/23/2026 1086750813 CMS
Novartis Pharmaceuticals Corporation $28.56 08/09/2024 Food and Beverage Undisputed 01/23/2026 1086750817 CMS
Novartis Pharmaceuticals Corporation $33.25 09/19/2024 Food and Beverage Undisputed 01/23/2026 1086750819 CMS
Novartis Pharmaceuticals Corporation $27.13 09/25/2024 Food and Beverage Undisputed 01/23/2026 1086750821 CMS
Novartis Pharmaceuticals Corporation $33.89 11/04/2024 Food and Beverage Undisputed 01/23/2026 1086750827 CMS
Novo Nordisk Inc $21.35 03/19/2024 Food and Beverage Undisputed 01/23/2026 1097349558 CMS
Novo Nordisk Inc $13.15 04/16/2024 Food and Beverage Undisputed 01/23/2026 1096939611 CMS
OPKO Pharmaceuticals, LLC $17.00 10/04/2024 Education Undisputed 01/23/2026 1112843332 CMS
OPKO Pharmaceuticals, LLC $16.56 11/08/2024 Education Undisputed 01/23/2026 1112843334 CMS
OPKO Pharmaceuticals, LLC $18.54 12/11/2024 Education Undisputed 01/23/2026 1112843336 CMS
Otsuka America Pharmaceutical, Inc. $24.57 02/08/2024 Food and Beverage Undisputed 01/23/2026 1118873372 CMS
Otsuka America Pharmaceutical, Inc. $26.42 04/20/2024 Food and Beverage Undisputed 01/23/2026 1118873374 CMS
Otsuka America Pharmaceutical, Inc. $26.10 06/26/2024 Food and Beverage Undisputed 01/23/2026 1118873376 CMS
Otsuka America Pharmaceutical, Inc. $25.88 08/13/2024 Food and Beverage Undisputed 01/23/2026 1118873378 CMS
Otsuka America Pharmaceutical, Inc. $28.00 09/11/2024 Food and Beverage Undisputed 01/23/2026 1118873380 CMS
Otsuka America Pharmaceutical, Inc. $20.75 11/14/2024 Food and Beverage Undisputed 01/23/2026 1118873382 CMS
Travere Therapeutics, Inc. $27.13 06/03/2024 Food and Beverage Undisputed 01/23/2026 1149931499 CMS
Vifor Pharma, Inc. $31.84 05/09/2024 Food and Beverage Undisputed 01/23/2026 1124038191 CMS
Vifor Pharma, Inc. $27.65 08/02/2024 Food and Beverage Undisputed 01/23/2026 1124057831 CMS
Vifor Pharma, Inc. $23.38 12/16/2024 Food and Beverage Undisputed 01/23/2026 1124063375 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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