Covered recipient · General Payments record

I-WEN CHANG

Allopathic & Osteopathic Physicians Internal Medicine Hematology & Oncology

NPI: 1912034471
CMS profile: 1186238
Location: LAWRENCEVILLE, GA

General Payments · PY2018–2024

$7,845.18

Reported across 287 records
CMS publication 2026-01-23

Latest program year · PY2024

$2,235.61

90 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 payment	Amount	Records
Food and Beverage	$2,189.22	87
Education	$46.39	3

By paying entity

PY2024 · sorted by reported total

Paying entity	Amount	Records
PFIZER INC.	$246.06	14
NOVARTIS PHARMACEUTICALS CORPORATION	$214.43	9
EISAI INC.	$140.10	6
Janssen Scientific Affairs, LLC	$132.45	1
Celgene Corporation	$128.45	5
Genmab U.S., Inc.	$125.00	1
Merck Sharp & Dohme Corporation	$97.50	3
ABBVIE INC.	$90.98	4
Acerta Pharma LLC	$84.41	4
Alexion Pharmaceuticals, Inc.	$83.89	3
Janssen Biotech, Inc.	$80.77	4
GlaxoSmithKline, LLC.	$76.07	3
Incyte Corporation	$64.99	3
AVEO Pharmaceuticals, Inc.	$50.48	2
BeiGene USA, Inc.	$45.75	2
Genentech USA, Inc.	$44.33	2
Daiichi Sankyo Inc.	$43.26	2
Coherus Biosciences Inc.	$39.97	2
Stemline Therapeutics Inc.	$38.80	2
E.R. Squibb & Sons, L.L.C.	$37.44	2
Ipsen Biopharmaceuticals, Inc	$36.59	1
Lilly USA, LLC	$31.29	1
Takeda Pharmaceuticals U.S.A., Inc.	$30.75	1
Inari Medical, Inc.	$30.12	1
Astellas Pharma US Inc	$23.65	1
Dendreon Pharmaceuticals LLC	$22.84	1
PUMA BIOTECHNOLOGY, INC.	$22.60	1
Exelixis Inc.	$22.57	1
TerSera Therapeutics LLC	$21.49	1
SERVIER PHARMACEUTICALS LLC	$20.20	1
Ferring Pharmaceuticals Inc.	$20.19	1
ADC Therapeutics America, Inc.	$20.00	1
Bayer HealthCare Pharmaceuticals Inc.	$18.84	1
Exact Sciences Corporation	$18.45	1
Gilead Sciences, Inc.	$16.47	1
Myriad Genetic Laboratories, Inc.	$14.43	1

By program year

All program years on this page · sorted by year

Program year	Amount	Records
PY2018	$479.73	5
PY2019	$55.89	4
PY2020	$15.57	1
PY2021	$71.74	4
PY2022	$1,767.52	68
PY2023	$3,219.12	115
PY2024	$2,235.61	90

Payment records · PY2024 (90)

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

Program year 2024 2018 2019 2020 2021 2022 2023 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.	$19.46	05/02/2024	Food and Beverage	Undisputed	01/23/2026	1103441380	CMS
ABBVIE INC.	$19.21	06/26/2024	Food and Beverage	Undisputed	01/23/2026	1103441382	CMS
ABBVIE INC.	$19.91	10/02/2024	Food and Beverage	Undisputed	01/23/2026	1103441384	CMS
ABBVIE INC.	$32.40	10/25/2024	Food and Beverage	Undisputed	01/23/2026	1103441386	CMS
ADC Therapeutics America, Inc.	$20.00	09/13/2024	Food and Beverage	Undisputed	01/23/2026	1121189889	CMS
Alexion Pharmaceuticals, Inc.	$26.51	05/22/2024	Food and Beverage	Undisputed	01/23/2026	1093955368	CMS
Alexion Pharmaceuticals, Inc.	$29.75	07/09/2024	Food and Beverage	Undisputed	01/23/2026	1093882061	CMS
Alexion Pharmaceuticals, Inc.	$27.63	11/14/2024	Food and Beverage	Undisputed	01/23/2026	1093937494	CMS
Astellas Pharma US Inc	$23.65	09/30/2024	Food and Beverage	Undisputed	01/23/2026	1139408973	CMS
AstraZeneca Pharmaceuticals LP	$18.37	04/26/2024	Food and Beverage	Undisputed	01/23/2026	1104635201	CMS
AstraZeneca Pharmaceuticals LP	$23.71	10/10/2024	Food and Beverage	Undisputed	01/23/2026	1105579966	CMS
AstraZeneca Pharmaceuticals LP	$19.34	11/21/2024	Food and Beverage	Undisputed	01/23/2026	1105544075	CMS
AstraZeneca Pharmaceuticals LP	$22.99	12/06/2024	Food and Beverage	Undisputed	01/23/2026	1104214835	CMS
Aveo Pharmaceuticals, Inc.	$30.48	06/04/2024	Food and Beverage	Undisputed	01/23/2026	1143478886	CMS
Aveo Pharmaceuticals, Inc.	$20.00	10/30/2024	Education	Undisputed	01/23/2026	1143478892	CMS
Bayer Healthcare Pharmaceuticals Inc.	$18.84	08/01/2024	Food and Beverage	Undisputed	01/23/2026	1086174218	CMS
BeiGene USA, Inc.	$21.65	05/16/2024	Food and Beverage	Undisputed	01/23/2026	1120863274	CMS
BeiGene USA, Inc.	$24.10	09/16/2024	Food and Beverage	Undisputed	01/23/2026	1120863276	CMS
Celgene Corporation	$22.29	02/05/2024	Food and Beverage	Undisputed	01/23/2026	1101081653	CMS
Celgene Corporation	$31.93	05/13/2024	Food and Beverage	Undisputed	01/23/2026	1101081659	CMS
Celgene Corporation	$22.48	06/20/2024	Food and Beverage	Undisputed	01/23/2026	1101081661	CMS
Celgene Corporation	$20.62	08/22/2024	Food and Beverage	Undisputed	01/23/2026	1101081663	CMS
Celgene Corporation	$31.13	09/25/2024	Food and Beverage	Undisputed	01/23/2026	1101081665	CMS
Coherus Biosciences Inc.	$19.96	05/29/2024	Food and Beverage	Undisputed	01/23/2026	1147277954	CMS
Coherus Biosciences Inc.	$20.01	10/21/2024	Food and Beverage	Undisputed	01/23/2026	1147277972	CMS
Daiichi Sankyo Inc.	$18.99	04/11/2024	Food and Beverage	Undisputed	01/23/2026	1089407592	CMS
Daiichi Sankyo Inc.	$24.27	08/21/2024	Food and Beverage	Undisputed	01/23/2026	1089407650	CMS
Dendreon Pharmaceuticals LLC	$22.84	10/30/2024	Food and Beverage	Undisputed	01/23/2026	1149313884	CMS
E.R. Squibb & Sons, L.L.C.	$22.17	02/14/2024	Food and Beverage	Undisputed	01/23/2026	1101218428	CMS
E.R. Squibb & Sons, L.L.C.	$15.27	05/09/2024	Food and Beverage	Undisputed	01/23/2026	1101218446	CMS
Eisai Inc.	$22.76	01/24/2024	Food and Beverage	Undisputed	01/23/2026	1110749936	CMS
Eisai Inc.	$13.35	03/08/2024	Education	Undisputed	01/23/2026	1110749932	CMS
Eisai Inc.	$23.45	03/08/2024	Food and Beverage	Undisputed	01/23/2026	1110749938	CMS
Eisai Inc.	$25.69	04/08/2024	Food and Beverage	Undisputed	01/23/2026	1110749934	CMS
Eisai Inc.	$24.88	05/02/2024	Food and Beverage	Undisputed	01/23/2026	1110749940	CMS
Eisai Inc.	$29.97	09/09/2024	Food and Beverage	Undisputed	01/23/2026	1110749930	CMS
Exact Sciences Corporation	$18.45	05/23/2024	Food and Beverage	Undisputed	01/23/2026	1114612269	CMS
Exelixis Inc.	$22.57	08/12/2024	Food and Beverage	Undisputed	01/23/2026	1138558830	CMS
Ferring Pharmaceuticals Inc.	$20.19	07/01/2024	Food and Beverage	Undisputed	01/23/2026	1137468773	CMS
Genentech USA, Inc.	$24.71	04/12/2024	Food and Beverage	Undisputed	01/23/2026	1133023091	CMS
Genentech USA, Inc.	$19.62	08/14/2024	Food and Beverage	Undisputed	01/23/2026	1133023095	CMS
Genmab U.S., Inc.	$125.00	11/22/2024	Food and Beverage	Undisputed	01/23/2026	1126827344	CMS
Gilead Sciences, Inc.	$16.47	08/26/2024	Food and Beverage	Undisputed	01/23/2026	1133796275	CMS
GlaxoSmithKline, LLC.	$28.51	03/11/2024	Food and Beverage	Undisputed	01/23/2026	1116332085	CMS
GlaxoSmithKline, LLC.	$20.98	09/18/2024	Food and Beverage	Undisputed	01/23/2026	1116602967	CMS
GlaxoSmithKline, LLC.	$26.58	12/18/2024	Food and Beverage	Undisputed	01/23/2026	1116247800	CMS
Inari Medical, Inc.	$30.12	05/29/2024	Food and Beverage	Undisputed	01/23/2026	1140068966	CMS
Incyte Corporation	$22.03	03/14/2024	Food and Beverage	Undisputed	01/23/2026	1141197979	CMS
Incyte Corporation	$23.75	07/18/2024	Food and Beverage	Undisputed	01/23/2026	1141249570	CMS
Incyte Corporation	$19.21	11/04/2024	Food and Beverage	Undisputed	01/23/2026	1141201389	CMS
Ipsen Biopharmaceuticals, Inc	$36.59	02/12/2024	Food and Beverage	Undisputed	01/23/2026	1091965758	CMS
Janssen Biotech, Inc.	$27.65	07/12/2024	Food and Beverage	Undisputed	01/23/2026	1078542330	CMS
Janssen Biotech, Inc.	$28.38	10/28/2024	Food and Beverage	Undisputed	01/23/2026	1078542439	CMS
Janssen Biotech, Inc.	$8.07	11/18/2024	Food and Beverage	Undisputed	01/23/2026	1078543500	CMS
Janssen Biotech, Inc.	$16.67	12/11/2024	Food and Beverage	Undisputed	01/23/2026	1078542994	CMS
Janssen Scientific Affairs, LLC	$132.45	12/05/2024	Food and Beverage	Undisputed	01/23/2026	1078849167	CMS
Lilly USA, LLC	$31.29	05/30/2024	Food and Beverage	Undisputed	01/23/2026	1135014247	CMS
Merck Sharp & Dohme LLC	$32.99	03/13/2024	Food and Beverage	Undisputed	01/23/2026	1141649138	CMS
Merck Sharp & Dohme LLC	$33.96	06/13/2024	Food and Beverage	Undisputed	01/23/2026	1141650721	CMS
Merck Sharp & Dohme LLC	$30.55	11/18/2024	Food and Beverage	Undisputed	01/23/2026	1141853889	CMS
Myriad Genetic Laboratories, Inc.	$14.43	09/23/2024	Food and Beverage	Undisputed	01/23/2026	1152528968	CMS
Novartis Pharmaceuticals Corporation	$26.29	01/15/2024	Food and Beverage	Undisputed	01/23/2026	1086679437	CMS
Novartis Pharmaceuticals Corporation	$16.65	04/22/2024	Food and Beverage	Undisputed	01/23/2026	1086679453	CMS
Novartis Pharmaceuticals Corporation	$33.84	06/10/2024	Food and Beverage	Undisputed	01/23/2026	1086679439	CMS
Novartis Pharmaceuticals Corporation	$17.00	07/10/2024	Food and Beverage	Undisputed	01/23/2026	1086679445	CMS
Novartis Pharmaceuticals Corporation	$17.32	07/25/2024	Food and Beverage	Undisputed	01/23/2026	1086679441	CMS
Novartis Pharmaceuticals Corporation	$20.35	08/08/2024	Food and Beverage	Undisputed	01/23/2026	1086679443	CMS
Novartis Pharmaceuticals Corporation	$34.69	09/04/2024	Food and Beverage	Undisputed	01/23/2026	1086679447	CMS
Novartis Pharmaceuticals Corporation	$31.63	10/29/2024	Food and Beverage	Undisputed	01/23/2026	1086679451	CMS
Novartis Pharmaceuticals Corporation	$16.66	11/12/2024	Food and Beverage	Undisputed	01/23/2026	1086679449	CMS
PFIZER INC.	$19.52	01/04/2024	Food and Beverage	Undisputed	01/23/2026	1131292899	CMS
PFIZER INC.	$26.33	01/29/2024	Food and Beverage	Undisputed	01/23/2026	1131283608	CMS
PFIZER INC.	$7.37	02/17/2024	Food and Beverage	Undisputed	01/23/2026	1131309815	CMS
PFIZER INC.	$15.96	04/30/2024	Food and Beverage	Undisputed	01/23/2026	1131421081	CMS
PFIZER INC.	$2.89	06/03/2024	Food and Beverage	Undisputed	01/23/2026	1131340545	CMS
PFIZER INC.	$15.33	06/03/2024	Food and Beverage	Undisputed	01/23/2026	1131340549	CMS
PFIZER INC.	$22.41	06/17/2024	Food and Beverage	Undisputed	01/23/2026	1131350870	CMS
PFIZER INC.	$22.59	07/22/2024	Food and Beverage	Undisputed	01/23/2026	1131354367	CMS
PFIZER INC.	$13.58	07/29/2024	Food and Beverage	Undisputed	01/23/2026	1131900351	CMS
PFIZER INC.	$19.47	08/07/2024	Food and Beverage	Undisputed	01/23/2026	1131839996	CMS
PFIZER INC.	$21.68	08/22/2024	Food and Beverage	Undisputed	01/23/2026	1132077401	CMS
PFIZER INC.	$13.04	10/26/2024	Education	Undisputed	01/23/2026	1132016699	CMS
PFIZER INC.	$26.87	11/11/2024	Food and Beverage	Undisputed	01/23/2026	1131384369	CMS
PFIZER INC.	$19.02	12/13/2024	Food and Beverage	Undisputed	01/23/2026	1131058768	CMS
PUMA BIOTECHNOLOGY, INC.	$22.60	04/19/2024	Food and Beverage	Undisputed	01/23/2026	1113851973	CMS
SERVIER PHARMACEUTICALS LLC	$20.20	12/16/2024	Food and Beverage	Undisputed	01/23/2026	1147260232	CMS
Stemline Therapeutics Inc.	$17.98	01/08/2024	Food and Beverage	Undisputed	01/23/2026	1142960501	CMS
Stemline Therapeutics Inc.	$20.82	09/11/2024	Food and Beverage	Undisputed	01/23/2026	1142960503	CMS
Takeda Pharmaceuticals U.S.A., Inc.	$30.75	08/28/2024	Food and Beverage	Undisputed	01/23/2026	1144955063	CMS
TerSera Therapeutics LLC	$21.49	05/01/2024	Food and Beverage	Undisputed	01/23/2026	1144715533	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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Corrections to the substance of a record route to CMS through its review-and-dispute process; errors in how this site mirrors or displays a record route to us. Both paths are described in Methodology & Data.