Covered recipient · General Payments record

PAUL S CHANG

Allopathic & Osteopathic Physicians Internal Medicine

NPI: 1487627261
CMS profile: 157343
Location: BUENA PARK, CA

General Payments · PY2018–2024

$62,072.17

Reported across 1,560 records
CMS publication 2026-01-23

Latest program year · PY2024

$2,573.83

122 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	$2,483.83	121
Education	$90.00	1

By paying entity

PY2024 · sorted by reported total

Paying entity	Amount	Records
Boehringer Ingelheim Pharmaceuticals, Inc.	$284.14	11
ABBVIE INC.	$244.47	10
Amgen Inc.	$195.95	17
Acerta Pharma LLC	$179.04	9
Novo Nordisk AS	$165.68	11
Ardelyx, Inc.	$158.31	7
Astellas Pharma US Inc	$148.61	5
Radius Health, Inc.	$108.99	4
IRONWOOD PHARMACEUTICALS, INC	$106.89	4
NOVARTIS PHARMACEUTICALS CORPORATION	$95.95	4
Lilly USA, LLC	$93.71	4
GlaxoSmithKline, LLC.	$93.15	4
IDORSIA PHARMACEUTICALS US INC	$70.12	4
Merck Sharp & Dohme Corporation	$62.40	2
Sumitomo Pharma America, Inc.	$56.67	3
Salix Pharmaceuticals, a division of Bausch Health US, LLC	$55.96	3
SCILEX PHARMACEUTICALS INC.	$53.00	3
Gilead Sciences, Inc.	$48.07	2
PFIZER INC.	$47.93	2
ABIOMED	$43.56	2
Bayer HealthCare Pharmaceuticals Inc.	$39.72	2
EISAI INC.	$30.71	1
ORPHALAN INC	$30.30	1
Exact Sciences Corporation	$29.53	1
Biogen, Inc.	$28.16	1
DEXCOM, INC.	$24.24	1
VIVUS LLC	$21.72	1
Otsuka America Pharmaceutical, Inc.	$21.49	1
Kowa Pharmaceuticals America, Inc.	$19.33	1
PROGENICS PHARMACEUTICALS, INC.	$16.03	1

By program year

All program years on this page · sorted by year

Program year	Amount	Records
PY2018	$13,015.28	323
PY2019	$13,586.61	270
PY2020	$6,831.10	192
PY2021	$8,219.26	249
PY2022	$7,824.93	231
PY2023	$10,021.16	173
PY2024	$2,573.83	122

Payment records · PY2024 (122)

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.	$27.78	03/20/2024	Food and Beverage	Undisputed	01/23/2026	1103442022	CMS
ABBVIE INC.	$22.92	04/04/2024	Food and Beverage	Undisputed	01/23/2026	1103442024	CMS
ABBVIE INC.	$27.11	04/11/2024	Food and Beverage	Undisputed	01/23/2026	1103442026	CMS
ABBVIE INC.	$31.97	04/25/2024	Food and Beverage	Undisputed	01/23/2026	1103442028	CMS
ABBVIE INC.	$29.57	05/07/2024	Food and Beverage	Undisputed	01/23/2026	1103442030	CMS
ABBVIE INC.	$31.21	05/23/2024	Food and Beverage	Undisputed	01/23/2026	1103442032	CMS
ABBVIE INC.	$24.48	06/05/2024	Food and Beverage	Undisputed	01/23/2026	1103442034	CMS
ABBVIE INC.	$9.77	07/22/2024	Food and Beverage	Undisputed	01/23/2026	1103442036	CMS
ABBVIE INC.	$29.14	10/08/2024	Food and Beverage	Undisputed	01/23/2026	1103442038	CMS
ABBVIE INC.	$10.52	10/31/2024	Food and Beverage	Undisputed	01/23/2026	1103442040	CMS
ABIOMED	$21.12	03/18/2024	Food and Beverage	Undisputed	01/23/2026	1142274805	CMS
ABIOMED	$22.44	04/23/2024	Food and Beverage	Undisputed	01/23/2026	1142274801	CMS
Amgen Inc.	$6.76	01/19/2024	Food and Beverage	Undisputed	01/23/2026	1117524251	CMS
Amgen Inc.	$7.41	01/24/2024	Food and Beverage	Undisputed	01/23/2026	1115491222	CMS
Amgen Inc.	$11.81	02/14/2024	Food and Beverage	Undisputed	01/23/2026	1115491228	CMS
Amgen Inc.	$8.45	04/10/2024	Food and Beverage	Undisputed	01/23/2026	1115491236	CMS
Amgen Inc.	$13.01	05/07/2024	Food and Beverage	Undisputed	01/23/2026	1115491243	CMS
Amgen Inc.	$33.82	05/24/2024	Food and Beverage	Undisputed	01/23/2026	1117524253	CMS
Amgen Inc.	$8.79	06/10/2024	Food and Beverage	Undisputed	01/23/2026	1115491248	CMS
Amgen Inc.	$8.69	07/08/2024	Food and Beverage	Undisputed	01/23/2026	1115491257	CMS
Amgen Inc.	$9.34	08/07/2024	Food and Beverage	Undisputed	01/23/2026	1115491265	CMS
Amgen Inc.	$9.28	08/30/2024	Food and Beverage	Undisputed	01/23/2026	1115491271	CMS
Amgen Inc.	$7.77	09/12/2024	Food and Beverage	Undisputed	01/23/2026	1115491276	CMS
Amgen Inc.	$8.43	10/04/2024	Food and Beverage	Undisputed	01/23/2026	1115491284	CMS
Amgen Inc.	$8.89	10/29/2024	Food and Beverage	Undisputed	01/23/2026	1115491291	CMS
Amgen Inc.	$9.37	11/01/2024	Food and Beverage	Undisputed	01/23/2026	1117524255	CMS
Amgen Inc.	$10.37	11/27/2024	Food and Beverage	Undisputed	01/23/2026	1115491297	CMS
Amgen Inc.	$29.29	12/03/2024	Food and Beverage	Undisputed	01/23/2026	1117524257	CMS
Amgen Inc.	$4.47	12/19/2024	Food and Beverage	Undisputed	01/23/2026	1117524259	CMS
Ardelyx, Inc.	$20.04	07/25/2024	Food and Beverage	Undisputed	01/23/2026	1146674668	CMS
Ardelyx, Inc.	$25.90	08/05/2024	Food and Beverage	Undisputed	01/23/2026	1146674670	CMS
Ardelyx, Inc.	$31.45	08/28/2024	Food and Beverage	Undisputed	01/23/2026	1146674672	CMS
Ardelyx, Inc.	$2.25	09/26/2024	Food and Beverage	Undisputed	01/23/2026	1146674674	CMS
Ardelyx, Inc.	$22.42	09/26/2024	Food and Beverage	Undisputed	01/23/2026	1146674676	CMS
Ardelyx, Inc.	$29.38	11/14/2024	Food and Beverage	Undisputed	01/23/2026	1146674678	CMS
Ardelyx, Inc.	$26.87	12/12/2024	Food and Beverage	Undisputed	01/23/2026	1146674680	CMS
Astellas Pharma US Inc	$14.01	02/26/2024	Food and Beverage	Undisputed	01/23/2026	1139317576	CMS
Astellas Pharma US Inc	$90.00	03/11/2024	Education	Undisputed	01/23/2026	1139345616	CMS
Astellas Pharma US Inc	$15.30	04/04/2024	Food and Beverage	Undisputed	01/23/2026	1139305686	CMS
Astellas Pharma US Inc	$13.68	06/21/2024	Food and Beverage	Undisputed	01/23/2026	1139364985	CMS
Astellas Pharma US Inc	$15.62	09/10/2024	Food and Beverage	Undisputed	01/23/2026	1139382544	CMS
AstraZeneca Pharmaceuticals LP	$21.77	01/26/2024	Food and Beverage	Undisputed	01/23/2026	1105240288	CMS
AstraZeneca Pharmaceuticals LP	$13.95	02/06/2024	Food and Beverage	Undisputed	01/23/2026	1105695030	CMS
AstraZeneca Pharmaceuticals LP	$15.67	02/13/2024	Food and Beverage	Undisputed	01/23/2026	1105594617	CMS
AstraZeneca Pharmaceuticals LP	$20.16	02/22/2024	Food and Beverage	Undisputed	01/23/2026	1105629104	CMS
AstraZeneca Pharmaceuticals LP	$29.39	07/31/2024	Food and Beverage	Undisputed	01/23/2026	1105742648	CMS
AstraZeneca Pharmaceuticals LP	$14.81	09/19/2024	Food and Beverage	Undisputed	01/23/2026	1104633795	CMS
AstraZeneca Pharmaceuticals LP	$22.06	09/25/2024	Food and Beverage	Undisputed	01/23/2026	1104651751	CMS
AstraZeneca Pharmaceuticals LP	$22.28	10/28/2024	Food and Beverage	Undisputed	01/23/2026	1105687985	CMS
AstraZeneca Pharmaceuticals LP	$18.95	12/17/2024	Food and Beverage	Undisputed	01/23/2026	1105530972	CMS
Bayer Healthcare Pharmaceuticals Inc.	$13.27	05/07/2024	Food and Beverage	Undisputed	01/23/2026	1086239498	CMS
Bayer Healthcare Pharmaceuticals Inc.	$26.45	09/17/2024	Food and Beverage	Undisputed	01/23/2026	1086202400	CMS
Biogen, Inc.	$28.16	09/03/2024	Food and Beverage	Undisputed	01/23/2026	1104821418	CMS
Boehringer Ingelheim Pharmaceuticals, Inc.	$24.09	01/08/2024	Food and Beverage	Undisputed	01/23/2026	1118029284	CMS
Boehringer Ingelheim Pharmaceuticals, Inc.	$26.19	02/05/2024	Food and Beverage	Undisputed	01/23/2026	1118029294	CMS
Boehringer Ingelheim Pharmaceuticals, Inc.	$24.32	03/04/2024	Food and Beverage	Undisputed	01/23/2026	1118029286	CMS
Boehringer Ingelheim Pharmaceuticals, Inc.	$24.32	04/19/2024	Food and Beverage	Undisputed	01/23/2026	1118029288	CMS
Boehringer Ingelheim Pharmaceuticals, Inc.	$21.28	06/10/2024	Food and Beverage	Undisputed	01/23/2026	1118029282	CMS
Boehringer Ingelheim Pharmaceuticals, Inc.	$25.60	07/15/2024	Food and Beverage	Undisputed	01/23/2026	1118029290	CMS
Boehringer Ingelheim Pharmaceuticals, Inc.	$26.28	08/19/2024	Food and Beverage	Undisputed	01/23/2026	1118029296	CMS
Boehringer Ingelheim Pharmaceuticals, Inc.	$31.51	09/16/2024	Food and Beverage	Undisputed	01/23/2026	1118029302	CMS
Boehringer Ingelheim Pharmaceuticals, Inc.	$26.28	10/14/2024	Food and Beverage	Undisputed	01/23/2026	1118029298	CMS
Boehringer Ingelheim Pharmaceuticals, Inc.	$28.16	11/11/2024	Food and Beverage	Undisputed	01/23/2026	1118029300	CMS
Boehringer Ingelheim Pharmaceuticals, Inc.	$26.11	12/09/2024	Food and Beverage	Undisputed	01/23/2026	1118029292	CMS
Dexcom, Inc.	$24.24	02/13/2024	Food and Beverage	Undisputed	01/23/2026	1153327551	CMS
Eisai Inc.	$30.71	07/29/2024	Food and Beverage	Undisputed	01/23/2026	1110771897	CMS
Exact Sciences Corporation	$29.53	08/20/2024	Food and Beverage	Undisputed	01/23/2026	1114612341	CMS
Gilead Sciences, Inc.	$31.80	05/09/2024	Food and Beverage	Undisputed	01/23/2026	1133766553	CMS
Gilead Sciences, Inc.	$16.27	09/04/2024	Food and Beverage	Undisputed	01/23/2026	1133766555	CMS
GlaxoSmithKline, LLC.	$22.35	05/22/2024	Food and Beverage	Undisputed	01/23/2026	1116182351	CMS
GlaxoSmithKline, LLC.	$21.90	08/15/2024	Food and Beverage	Undisputed	01/23/2026	1116713605	CMS
GlaxoSmithKline, LLC.	$24.06	08/16/2024	Food and Beverage	Undisputed	01/23/2026	1116609098	CMS
GlaxoSmithKline, LLC.	$24.84	10/31/2024	Food and Beverage	Undisputed	01/23/2026	1115800738	CMS
IDORSIA PHARMACEUTICALS US INC	$14.08	01/19/2024	Food and Beverage	Undisputed	01/23/2026	1146753640	CMS
IDORSIA PHARMACEUTICALS US INC	$17.10	02/16/2024	Food and Beverage	Undisputed	01/23/2026	1146754473	CMS
IDORSIA PHARMACEUTICALS US INC	$19.47	03/16/2024	Food and Beverage	Undisputed	01/23/2026	1146755371	CMS
IDORSIA PHARMACEUTICALS US INC	$19.47	04/13/2024	Food and Beverage	Undisputed	01/23/2026	1146755857	CMS
IRONWOOD PHARMACEUTICALS, INC	$26.30	01/25/2024	Food and Beverage	Undisputed	01/23/2026	1153755893	CMS
IRONWOOD PHARMACEUTICALS, INC	$27.04	04/16/2024	Food and Beverage	Undisputed	01/23/2026	1153764813	CMS
IRONWOOD PHARMACEUTICALS, INC	$27.46	07/16/2024	Food and Beverage	Undisputed	01/23/2026	1153769462	CMS
IRONWOOD PHARMACEUTICALS, INC	$26.09	10/03/2024	Food and Beverage	Undisputed	01/23/2026	1153755897	CMS
Kowa Pharmaceuticals America, Inc.	$19.33	12/05/2024	Food and Beverage	Undisputed	01/23/2026	1113464913	CMS
Lilly USA, LLC	$26.28	04/21/2024	Food and Beverage	Undisputed	01/23/2026	1135320569	CMS
Lilly USA, LLC	$25.18	07/23/2024	Food and Beverage	Undisputed	01/23/2026	1135285928	CMS
Lilly USA, LLC	$18.12	08/02/2024	Food and Beverage	Undisputed	01/23/2026	1135285932	CMS
Lilly USA, LLC	$24.13	10/17/2024	Food and Beverage	Undisputed	01/23/2026	1135314088	CMS
Merck Sharp & Dohme LLC	$34.72	07/12/2024	Food and Beverage	Undisputed	01/23/2026	1141951809	CMS
Merck Sharp & Dohme LLC	$27.68	10/30/2024	Food and Beverage	Undisputed	01/23/2026	1141823525	CMS
Novartis Pharmaceuticals Corporation	$24.57	02/02/2024	Food and Beverage	Undisputed	01/23/2026	1086738711	CMS
Novartis Pharmaceuticals Corporation	$25.25	05/09/2024	Food and Beverage	Undisputed	01/23/2026	1086738721	CMS
Novartis Pharmaceuticals Corporation	$24.68	06/24/2024	Food and Beverage	Undisputed	01/23/2026	1086738729	CMS
Novartis Pharmaceuticals Corporation	$21.45	07/26/2024	Food and Beverage	Undisputed	01/23/2026	1086738731	CMS
Novo Nordisk Inc	$12.44	01/26/2024	Food and Beverage	Undisputed	01/23/2026	1096882276	CMS
Novo Nordisk Inc	$20.20	02/13/2024	Food and Beverage	Undisputed	01/23/2026	1097118693	CMS
Novo Nordisk Inc	$13.43	02/27/2024	Food and Beverage	Undisputed	01/23/2026	1097546366	CMS
Novo Nordisk Inc	$10.92	04/05/2024	Food and Beverage	Undisputed	01/23/2026	1096792135	CMS
Novo Nordisk Inc	$15.83	07/09/2024	Food and Beverage	Undisputed	01/23/2026	1097823772	CMS
Novo Nordisk Inc	$6.26	08/05/2024	Food and Beverage	Undisputed	01/23/2026	1096888950	CMS
Novo Nordisk Inc	$18.42	08/09/2024	Food and Beverage	Undisputed	01/23/2026	1097124185	CMS
Novo Nordisk Inc	$19.56	08/13/2024	Food and Beverage	Undisputed	01/23/2026	1096717342	CMS
Novo Nordisk Inc	$23.22	09/12/2024	Food and Beverage	Undisputed	01/23/2026	1096822755	CMS
Novo Nordisk Inc	$18.86	09/24/2024	Food and Beverage	Undisputed	01/23/2026	1096890030	CMS
Novo Nordisk Inc	$6.54	10/14/2024	Food and Beverage	Undisputed	01/23/2026	1096723830	CMS
ORPHALAN INC	$30.30	03/21/2024	Food and Beverage	Undisputed	01/23/2026	1154763079	CMS
Otsuka America Pharmaceutical, Inc.	$21.49	11/26/2024	Food and Beverage	Undisputed	01/23/2026	1118873414	CMS
PFIZER INC.	$21.72	04/02/2024	Food and Beverage	Undisputed	01/23/2026	1131211608	CMS
PFIZER INC.	$26.21	11/25/2024	Food and Beverage	Undisputed	01/23/2026	1131023624	CMS
PROGENICS PHARMACEUTICALS, INC.	$16.03	08/22/2024	Food and Beverage	Undisputed	01/23/2026	1128507324	CMS
Radius Health, Inc.	$27.50	02/15/2024	Food and Beverage	Undisputed	01/23/2026	1089982195	CMS
Radius Health, Inc.	$29.18	03/11/2024	Food and Beverage	Undisputed	01/23/2026	1089982189	CMS
Radius Health, Inc.	$25.38	04/15/2024	Food and Beverage	Undisputed	01/23/2026	1089982201	CMS
Radius Health, Inc.	$26.93	07/08/2024	Food and Beverage	Undisputed	01/23/2026	1089982209	CMS
Salix Pharmaceuticals, a division of Bausch Health US, LLC	$21.18	04/24/2024	Food and Beverage	Undisputed	01/23/2026	1153660746	CMS
Salix Pharmaceuticals, a division of Bausch Health US, LLC	$20.80	05/29/2024	Food and Beverage	Undisputed	01/23/2026	1153547737	CMS
Salix Pharmaceuticals, a division of Bausch Health US, LLC	$13.98	07/16/2024	Food and Beverage	Undisputed	01/23/2026	1153671180	CMS
SCILEX PHARMACEUTICALS INC.	$19.48	04/05/2024	Food and Beverage	Undisputed	01/23/2026	1136234680	CMS
SCILEX PHARMACEUTICALS INC.	$15.37	05/16/2024	Food and Beverage	Undisputed	01/23/2026	1136244646	CMS
SCILEX PHARMACEUTICALS INC.	$18.15	06/11/2024	Food and Beverage	Undisputed	01/23/2026	1136250208	CMS
Sumitomo Pharma America, Inc.	$17.16	07/03/2024	Food and Beverage	Undisputed	01/23/2026	1148836809	CMS
Sumitomo Pharma America, Inc.	$17.16	09/05/2024	Food and Beverage	Undisputed	01/23/2026	1148836811	CMS
Sumitomo Pharma America, Inc.	$22.35	10/07/2024	Food and Beverage	Undisputed	01/23/2026	1148836813	CMS
VIVUS LLC	$21.72	02/08/2024	Food and Beverage	Undisputed	01/23/2026	1129415046	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.