Covered recipient · General Payments record

ALAN W CHANG

Allopathic & Osteopathic Physicians Internal Medicine Gastroenterology

NPI: 1912992330
CMS profile: 86445
Location: DOYLESTOWN, PA

General Payments · PY2018–2024

$13,689.32

Reported across 741 records
CMS publication 2026-01-23

Latest program year · PY2024

$3,364.89

139 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	$3,304.46	137
Education	$60.43	2

By paying entity

PY2024 · sorted by reported total

Paying entity	Amount	Records
ABBVIE INC.	$503.99	29
Phathom Pharmaceuticals, Inc.	$306.15	7
Takeda Pharmaceuticals U.S.A., Inc.	$252.84	16
GENZYME CORPORATION	$233.94	5
Lilly USA, LLC	$188.18	5
Medtronic, Inc.	$179.27	4
Janssen Biotech, Inc.	$177.39	3
INTERCEPT PHARMACEUTICALS, INC.	$175.80	4
Salix Pharmaceuticals, a division of Bausch Health US, LLC	$161.65	11
Gilead Sciences, Inc.	$161.30	5
Celltrion USA Inc.	$135.93	5
PFIZER INC.	$108.33	6
Ardelyx, Inc.	$103.52	5
IRONWOOD PHARMACEUTICALS, INC	$99.27	6
Celgene Corporation	$95.36	5
Braintree Laboratories, Inc.	$90.32	4
Ipsen Biopharmaceuticals, Inc	$62.65	3
Regeneron Healthcare Solutions, Inc.	$57.80	3
AIMMUNE THERAPEUTICS, INC.	$47.69	2
BOSTON SCIENTIFIC CORPORATION	$44.31	1
Sandoz Inc.	$32.96	2
Madrigal Pharmaceuticals	$25.08	1
Daiichi Sankyo Inc.	$19.46	1
Fresenius Kabi USA, LLC	$18.94	1
Alnylam Pharmaceuticals Inc.	$18.28	1
QOL Medical, LLC	$17.33	1
Digestive Care, Inc.	$16.85	1
Teleflex LLC	$15.90	1
Merck Sharp & Dohme Corporation	$14.40	1

By program year

All program years on this page · sorted by year

Program year	Amount	Records
PY2018	$1,297.86	99
PY2019	$1,763.65	115
PY2020	$994.26	68
PY2021	$1,962.37	111
PY2022	$1,911.77	99
PY2023	$2,394.52	110
PY2024	$3,364.89	139

Payment records · PY2024 (139)

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.	$15.72	01/04/2024	Food and Beverage	Undisputed	01/23/2026	1103440434	CMS
ABBVIE INC.	$21.97	01/26/2024	Food and Beverage	Undisputed	01/23/2026	1103440436	CMS
ABBVIE INC.	$14.63	02/07/2024	Food and Beverage	Undisputed	01/23/2026	1103440438	CMS
ABBVIE INC.	$19.65	02/09/2024	Food and Beverage	Undisputed	01/23/2026	1103440440	CMS
ABBVIE INC.	$17.18	02/21/2024	Food and Beverage	Undisputed	01/23/2026	1103440442	CMS
ABBVIE INC.	$18.29	03/18/2024	Food and Beverage	Undisputed	01/23/2026	1103440444	CMS
ABBVIE INC.	$17.18	03/20/2024	Food and Beverage	Undisputed	01/23/2026	1103440446	CMS
ABBVIE INC.	$16.25	03/27/2024	Food and Beverage	Undisputed	01/23/2026	1103440448	CMS
ABBVIE INC.	$16.16	04/17/2024	Food and Beverage	Undisputed	01/23/2026	1103440450	CMS
ABBVIE INC.	$19.57	04/25/2024	Food and Beverage	Undisputed	01/23/2026	1103440452	CMS
ABBVIE INC.	$12.34	05/16/2024	Food and Beverage	Undisputed	01/23/2026	1103440454	CMS
ABBVIE INC.	$16.38	05/22/2024	Food and Beverage	Undisputed	01/23/2026	1103440456	CMS
ABBVIE INC.	$12.85	05/23/2024	Food and Beverage	Undisputed	01/23/2026	1103440458	CMS
ABBVIE INC.	$12.15	05/31/2024	Food and Beverage	Undisputed	01/23/2026	1103440460	CMS
ABBVIE INC.	$23.89	06/17/2024	Food and Beverage	Undisputed	01/23/2026	1103440462	CMS
ABBVIE INC.	$14.60	06/24/2024	Food and Beverage	Undisputed	01/23/2026	1103440464	CMS
ABBVIE INC.	$19.68	07/31/2024	Food and Beverage	Undisputed	01/23/2026	1103440466	CMS
ABBVIE INC.	$17.40	08/20/2024	Food and Beverage	Undisputed	01/23/2026	1103440468	CMS
ABBVIE INC.	$15.50	08/21/2024	Food and Beverage	Undisputed	01/23/2026	1103440470	CMS
ABBVIE INC.	$21.71	09/18/2024	Food and Beverage	Undisputed	01/23/2026	1103440472	CMS
ABBVIE INC.	$18.00	09/25/2024	Food and Beverage	Undisputed	01/23/2026	1103440474	CMS
ABBVIE INC.	$19.48	09/27/2024	Food and Beverage	Undisputed	01/23/2026	1103440476	CMS
ABBVIE INC.	$20.98	10/01/2024	Food and Beverage	Undisputed	01/23/2026	1103440478	CMS
ABBVIE INC.	$7.58	10/28/2024	Food and Beverage	Undisputed	01/23/2026	1103440480	CMS
ABBVIE INC.	$15.87	11/12/2024	Food and Beverage	Undisputed	01/23/2026	1103440482	CMS
ABBVIE INC.	$20.20	11/13/2024	Food and Beverage	Undisputed	01/23/2026	1103440484	CMS
ABBVIE INC.	$22.20	11/22/2024	Food and Beverage	Undisputed	01/23/2026	1103440486	CMS
ABBVIE INC.	$18.61	12/04/2024	Food and Beverage	Undisputed	01/23/2026	1103440488	CMS
ABBVIE INC.	$17.97	12/16/2024	Food and Beverage	Undisputed	01/23/2026	1103440490	CMS
AIMMUNE THERAPEUTICS, INC.	$22.26	09/18/2024	Food and Beverage	Undisputed	01/23/2026	1146999804	CMS
AIMMUNE THERAPEUTICS, INC.	$25.43	12/04/2024	Food and Beverage	Undisputed	01/23/2026	1146994817	CMS
Alnylam Pharmaceuticals Inc.	$18.28	05/07/2024	Food and Beverage	Undisputed	01/23/2026	1125852319	CMS
Ardelyx, Inc.	$21.16	01/23/2024	Food and Beverage	Undisputed	01/23/2026	1146674576	CMS
Ardelyx, Inc.	$14.89	07/18/2024	Food and Beverage	Undisputed	01/23/2026	1146674578	CMS
Ardelyx, Inc.	$26.27	10/09/2024	Food and Beverage	Undisputed	01/23/2026	1146674580	CMS
Ardelyx, Inc.	$19.27	10/22/2024	Food and Beverage	Undisputed	01/23/2026	1146674582	CMS
Ardelyx, Inc.	$21.93	11/16/2024	Food and Beverage	Undisputed	01/23/2026	1146674584	CMS
Boston Scientific Corporation	$44.31	12/18/2024	Food and Beverage	Undisputed	01/23/2026	1092316238	CMS
Braintree Laboratories, Inc.	$16.92	01/23/2024	Food and Beverage	Undisputed	01/23/2026	1125513529	CMS
Braintree Laboratories, Inc.	$15.99	02/07/2024	Food and Beverage	Undisputed	01/23/2026	1125513531	CMS
Braintree Laboratories, Inc.	$31.09	10/18/2024	Food and Beverage	Undisputed	01/23/2026	1125513533	CMS
Braintree Laboratories, Inc.	$26.32	11/20/2024	Food and Beverage	Undisputed	01/23/2026	1125513535	CMS
Celgene Corporation	$19.76	01/09/2024	Food and Beverage	Undisputed	01/23/2026	1101155960	CMS
Celgene Corporation	$18.24	01/23/2024	Food and Beverage	Undisputed	01/23/2026	1101155968	CMS
Celgene Corporation	$17.10	02/23/2024	Food and Beverage	Undisputed	01/23/2026	1101155976	CMS
Celgene Corporation	$19.15	05/14/2024	Food and Beverage	Undisputed	01/23/2026	1101155992	CMS
Celgene Corporation	$21.11	08/14/2024	Food and Beverage	Undisputed	01/23/2026	1101155994	CMS
Celltrion USA Inc.	$45.18	03/13/2024	Education	Undisputed	01/23/2026	1075849489	CMS
Celltrion USA Inc.	$15.25	04/23/2024	Education	Undisputed	01/23/2026	1075849491	CMS
Celltrion USA Inc.	$24.29	08/02/2024	Food and Beverage	Undisputed	01/23/2026	1075849493	CMS
Celltrion USA Inc.	$20.03	08/29/2024	Food and Beverage	Undisputed	01/23/2026	1075849495	CMS
Celltrion USA Inc.	$31.18	10/16/2024	Food and Beverage	Undisputed	01/23/2026	1075849497	CMS
Daiichi Sankyo Inc.	$19.46	07/24/2024	Food and Beverage	Undisputed	01/23/2026	1089407640	CMS
Digestive Care, Inc.	$16.85	05/16/2024	Food and Beverage	Undisputed	01/23/2026	1087652843	CMS
Fresenius Kabi USA, LLC	$18.94	01/08/2024	Food and Beverage	Undisputed	01/23/2026	1146943336	CMS
GENZYME CORPORATION	$20.37	01/31/2024	Food and Beverage	Undisputed	01/23/2026	1139700867	CMS
GENZYME CORPORATION	$18.33	04/15/2024	Food and Beverage	Undisputed	01/23/2026	1139700891	CMS
GENZYME CORPORATION	$25.86	09/12/2024	Food and Beverage	Undisputed	01/23/2026	1139700947	CMS
GENZYME CORPORATION	$150.11	10/26/2024	Food and Beverage	Undisputed	01/23/2026	1139701007	CMS
GENZYME CORPORATION	$19.27	12/17/2024	Food and Beverage	Undisputed	01/23/2026	1139701001	CMS
Gilead Sciences, Inc.	$18.31	01/10/2024	Food and Beverage	Undisputed	01/23/2026	1133775551	CMS
Gilead Sciences, Inc.	$0.74	03/21/2024	Food and Beverage	Undisputed	01/23/2026	1133775553	CMS
Gilead Sciences, Inc.	$10.85	03/21/2024	Food and Beverage	Undisputed	01/23/2026	1133775555	CMS
Gilead Sciences, Inc.	$123.48	12/04/2024	Food and Beverage	Undisputed	01/23/2026	1133775557	CMS
Gilead Sciences, Inc.	$7.92	12/15/2024	Food and Beverage	Undisputed	01/23/2026	1133775559	CMS
Intercept Pharmaceuticals, Inc.	$22.48	04/17/2024	Food and Beverage	Undisputed	01/23/2026	1113630082	CMS
Intercept Pharmaceuticals, Inc.	$16.86	06/25/2024	Food and Beverage	Undisputed	01/23/2026	1113630080	CMS
Intercept Pharmaceuticals, Inc.	$115.64	06/26/2024	Food and Beverage	Undisputed	01/23/2026	1113630084	CMS
Intercept Pharmaceuticals, Inc.	$20.82	09/03/2024	Food and Beverage	Undisputed	01/23/2026	1113630086	CMS
Ipsen Biopharmaceuticals, Inc	$20.88	05/08/2024	Food and Beverage	Undisputed	01/23/2026	1091979754	CMS
Ipsen Biopharmaceuticals, Inc	$20.74	08/27/2024	Food and Beverage	Undisputed	01/23/2026	1091979750	CMS
Ipsen Biopharmaceuticals, Inc	$21.03	12/10/2024	Food and Beverage	Undisputed	01/23/2026	1091979752	CMS
IRONWOOD PHARMACEUTICALS, INC	$18.56	02/01/2024	Food and Beverage	Undisputed	01/23/2026	1153734103	CMS
IRONWOOD PHARMACEUTICALS, INC	$16.71	02/15/2024	Food and Beverage	Undisputed	01/23/2026	1153742661	CMS
IRONWOOD PHARMACEUTICALS, INC	$15.62	03/12/2024	Food and Beverage	Undisputed	01/23/2026	1153771984	CMS
IRONWOOD PHARMACEUTICALS, INC	$13.12	05/30/2024	Food and Beverage	Undisputed	01/23/2026	1153767319	CMS
IRONWOOD PHARMACEUTICALS, INC	$13.98	07/17/2024	Food and Beverage	Undisputed	01/23/2026	1153742666	CMS
IRONWOOD PHARMACEUTICALS, INC	$21.28	09/26/2024	Food and Beverage	Undisputed	01/23/2026	1153716591	CMS
Janssen Biotech, Inc.	$26.93	09/11/2024	Food and Beverage	Undisputed	01/23/2026	1078559000	CMS
Janssen Biotech, Inc.	$125.00	11/11/2024	Food and Beverage	Undisputed	01/23/2026	1078559992	CMS
Janssen Biotech, Inc.	$25.46	11/27/2024	Food and Beverage	Undisputed	01/23/2026	1078559851	CMS
Lilly USA, LLC	$113.40	04/16/2024	Food and Beverage	Undisputed	01/23/2026	1136013065	CMS
Lilly USA, LLC	$19.53	05/28/2024	Food and Beverage	Undisputed	01/23/2026	1136016601	CMS
Lilly USA, LLC	$26.84	09/19/2024	Food and Beverage	Undisputed	01/23/2026	1136014198	CMS
Lilly USA, LLC	$14.04	11/26/2024	Food and Beverage	Undisputed	01/23/2026	1136015483	CMS
Lilly USA, LLC	$14.37	12/15/2024	Food and Beverage	Undisputed	01/23/2026	1136015485	CMS
Madrigal Pharmaceuticals	$25.08	10/24/2024	Food and Beverage	Undisputed	01/23/2026	1144163107	CMS
Medtronic, Inc.	$28.61	08/30/2024	Food and Beverage	Undisputed	01/23/2026	1119546939	CMS
Medtronic, Inc.	$12.28	10/04/2024	Food and Beverage	Undisputed	01/23/2026	1119546941	CMS
Medtronic, Inc.	$107.76	11/01/2024	Food and Beverage	Undisputed	01/23/2026	1119546943	CMS
Medtronic, Inc.	$30.62	12/27/2024	Food and Beverage	Undisputed	01/23/2026	1119546945	CMS
Merck Sharp & Dohme LLC	$14.40	12/13/2024	Food and Beverage	Undisputed	01/23/2026	1141880793	CMS
PFIZER INC.	$15.41	01/17/2024	Food and Beverage	Undisputed	01/23/2026	1131107540	CMS
PFIZER INC.	$22.41	02/15/2024	Food and Beverage	Undisputed	01/23/2026	1131186431	CMS
PFIZER INC.	$16.96	03/02/2024	Food and Beverage	Undisputed	01/23/2026	1131280255	CMS
PFIZER INC.	$15.99	04/02/2024	Food and Beverage	Undisputed	01/23/2026	1131384477	CMS
PFIZER INC.	$16.63	05/15/2024	Food and Beverage	Undisputed	01/23/2026	1131440080	CMS
PFIZER INC.	$20.93	07/25/2024	Food and Beverage	Undisputed	01/23/2026	1131760372	CMS
Phathom Pharmaceuticals, Inc.	$18.92	03/07/2024	Food and Beverage	Undisputed	01/23/2026	1151047788	CMS
Phathom Pharmaceuticals, Inc.	$124.74	03/21/2024	Food and Beverage	Undisputed	01/23/2026	1151047790	CMS
Phathom Pharmaceuticals, Inc.	$12.49	04/30/2024	Food and Beverage	Undisputed	01/23/2026	1151047792	CMS
Phathom Pharmaceuticals, Inc.	$15.75	05/11/2024	Food and Beverage	Undisputed	01/23/2026	1151047794	CMS
Phathom Pharmaceuticals, Inc.	$113.40	09/05/2024	Food and Beverage	Undisputed	01/23/2026	1151047796	CMS
Phathom Pharmaceuticals, Inc.	$9.15	09/10/2024	Food and Beverage	Undisputed	01/23/2026	1151047798	CMS
Phathom Pharmaceuticals, Inc.	$11.70	11/14/2024	Food and Beverage	Undisputed	01/23/2026	1151047800	CMS
QOL Medical, LLC	$17.33	02/22/2024	Food and Beverage	Undisputed	01/23/2026	1147726242	CMS
Regeneron Healthcare Solutions, Inc.	$16.59	05/30/2024	Food and Beverage	Undisputed	01/23/2026	1114021620	CMS
Regeneron Healthcare Solutions, Inc.	$18.25	08/28/2024	Food and Beverage	Undisputed	01/23/2026	1114021622	CMS
Regeneron Healthcare Solutions, Inc.	$22.96	11/21/2024	Food and Beverage	Undisputed	01/23/2026	1114021624	CMS
Salix Pharmaceuticals, a division of Bausch Health US, LLC	$14.81	01/03/2024	Food and Beverage	Undisputed	01/23/2026	1153731722	CMS
Salix Pharmaceuticals, a division of Bausch Health US, LLC	$20.83	05/09/2024	Food and Beverage	Undisputed	01/23/2026	1153629173	CMS
Salix Pharmaceuticals, a division of Bausch Health US, LLC	$18.74	08/07/2024	Food and Beverage	Undisputed	01/23/2026	1153483714	CMS
Salix Pharmaceuticals, a division of Bausch Health US, LLC	$14.86	09/05/2024	Food and Beverage	Undisputed	01/23/2026	1153614476	CMS
Salix Pharmaceuticals, a division of Bausch Health US, LLC	$17.49	09/13/2024	Food and Beverage	Undisputed	01/23/2026	1153437964	CMS
Salix Pharmaceuticals, a division of Bausch Health US, LLC	$23.19	09/18/2024	Food and Beverage	Undisputed	01/23/2026	1153704362	CMS
Salix Pharmaceuticals, a division of Bausch Health US, LLC	$21.40	10/04/2024	Food and Beverage	Undisputed	01/23/2026	1153530425	CMS
Salix Pharmaceuticals, a division of Bausch Health US, LLC	$20.61	10/31/2024	Food and Beverage	Undisputed	01/23/2026	1153649826	CMS
Salix Pharmaceuticals, a division of Bausch Health US, LLC	$6.15	12/23/2024	Food and Beverage	Undisputed	01/23/2026	1153475390	CMS
Salix Pharmaceuticals, a division of Bausch Health US, LLC	$0.48	12/23/2024	Food and Beverage	Undisputed	01/23/2026	1153475978	CMS
Salix Pharmaceuticals, a division of Bausch Health US, LLC	$3.09	12/23/2024	Food and Beverage	Undisputed	01/23/2026	1153612910	CMS
Sandoz Inc.	$18.10	01/03/2024	Food and Beverage	Undisputed	01/23/2026	1089370600	CMS
Sandoz Inc.	$14.86	06/19/2024	Food and Beverage	Undisputed	01/23/2026	1089370672	CMS
Takeda Pharmaceuticals U.S.A., Inc.	$14.01	01/17/2024	Food and Beverage	Undisputed	01/23/2026	1137507151	CMS
Takeda Pharmaceuticals U.S.A., Inc.	$17.03	02/08/2024	Food and Beverage	Undisputed	01/23/2026	1137507154	CMS
Takeda Pharmaceuticals U.S.A., Inc.	$12.66	02/28/2024	Food and Beverage	Undisputed	01/23/2026	1137507158	CMS
Takeda Pharmaceuticals U.S.A., Inc.	$10.72	04/11/2024	Food and Beverage	Undisputed	01/23/2026	1137507162	CMS
Takeda Pharmaceuticals U.S.A., Inc.	$18.33	04/12/2024	Food and Beverage	Undisputed	01/23/2026	1137507166	CMS
Takeda Pharmaceuticals U.S.A., Inc.	$16.45	04/23/2024	Food and Beverage	Undisputed	01/23/2026	1137507170	CMS
Takeda Pharmaceuticals U.S.A., Inc.	$10.85	05/02/2024	Food and Beverage	Undisputed	01/23/2026	1137507174	CMS
Takeda Pharmaceuticals U.S.A., Inc.	$21.26	05/20/2024	Food and Beverage	Undisputed	01/23/2026	1137507177	CMS
Takeda Pharmaceuticals U.S.A., Inc.	$13.76	06/20/2024	Food and Beverage	Undisputed	01/23/2026	1137507181	CMS
Takeda Pharmaceuticals U.S.A., Inc.	$22.63	06/26/2024	Food and Beverage	Undisputed	01/23/2026	1137507185	CMS
Takeda Pharmaceuticals U.S.A., Inc.	$15.48	07/15/2024	Food and Beverage	Undisputed	01/23/2026	1137507188	CMS
Takeda Pharmaceuticals U.S.A., Inc.	$12.47	08/19/2024	Food and Beverage	Undisputed	01/23/2026	1137507192	CMS
Takeda Pharmaceuticals U.S.A., Inc.	$24.05	09/18/2024	Food and Beverage	Undisputed	01/23/2026	1137507196	CMS
Takeda Pharmaceuticals U.S.A., Inc.	$11.21	11/06/2024	Food and Beverage	Undisputed	01/23/2026	1137507200	CMS
Takeda Pharmaceuticals U.S.A., Inc.	$17.83	11/21/2024	Food and Beverage	Undisputed	01/23/2026	1137507204	CMS
Takeda Pharmaceuticals U.S.A., Inc.	$14.10	11/26/2024	Food and Beverage	Undisputed	01/23/2026	1137507207	CMS
Teleflex LLC	$15.90	07/11/2024	Food and Beverage	Undisputed	01/23/2026	1142096163	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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