WILLIAM CHASTANT

Allopathic & Osteopathic Physicians|Internal Medicine|Gastroenterology LAFAYETTE, LA NPI 1770087504

General Payments — all program years on this page

$2,329.21

Category: General Payments
Program years: PY2022–2024
Record count: 91
As of (CMS publication): 2026-01-23

Latest program year (PY2024): $1,073.01 across 53 records · disputed records: 0

Financial relationships do not necessarily indicate an improper relationship; the data is open to interpretation.

How this figure is 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

Latest program year (PY2024) · sorted by reported total.

Nature of payment	Amount	Records
Food and Beverage	$1,073.01	53

By paying entity

Latest program year (PY2024) · sorted by reported total.

Paying entity	Amount	Records
ABBVIE INC.	$339.53	17
Phathom Pharmaceuticals, Inc.	$167.84	6
Takeda Pharmaceuticals U.S.A., Inc.	$132.09	10
Janssen Biotech, Inc.	$94.42	1
Salix Pharmaceuticals, a division of Bausch Health US, LLC	$82.52	5
Celgene Corporation	$41.35	2
AIMMUNE THERAPEUTICS, INC.	$39.68	2
Ardelyx, Inc.	$33.61	2
IRONWOOD PHARMACEUTICALS, INC	$31.48	2
Cook Medical LLC	$23.49	1
Acerta Pharma LLC	$20.92	1
INTERCEPT PHARMACEUTICALS, INC.	$17.68	1
QOL Medical, LLC	$17.64	1
Madrigal Pharmaceuticals	$16.19	1
Celltrion USA Inc.	$14.57	1

By program year

Program year	Amount	Records
2022	$426.20	15
2023	$830.00	23
2024	$1,073.01	53

Records — PY2024 (53)

Record ID	Paying entity	Amount	Date	Nature of payment	Dispute status	Published	Source
1075849563	Celltrion USA Inc.	$14.57	09/23/2024	Food and Beverage	Undisputed	01/23/2026	View at CMS
1078673398	Janssen Biotech, Inc.	$94.42	11/21/2024	Food and Beverage	Undisputed	01/23/2026	View at CMS
1101152977	Celgene Corporation	$22.46	04/19/2024	Food and Beverage	Undisputed	01/23/2026	View at CMS
1101152991	Celgene Corporation	$18.89	09/24/2024	Food and Beverage	Undisputed	01/23/2026	View at CMS
1103447372	ABBVIE INC.	$3.08	01/19/2024	Food and Beverage	Undisputed	01/23/2026	View at CMS
1103447374	ABBVIE INC.	$3.73	01/24/2024	Food and Beverage	Undisputed	01/23/2026	View at CMS
1103447376	ABBVIE INC.	$13.94	01/26/2024	Food and Beverage	Undisputed	01/23/2026	View at CMS
1103447378	ABBVIE INC.	$32.14	04/05/2024	Food and Beverage	Undisputed	01/23/2026	View at CMS
1103447380	ABBVIE INC.	$125.00	04/17/2024	Food and Beverage	Undisputed	01/23/2026	View at CMS
1103447382	ABBVIE INC.	$24.09	04/26/2024	Food and Beverage	Undisputed	01/23/2026	View at CMS
1103447384	ABBVIE INC.	$7.85	04/26/2024	Food and Beverage	Undisputed	01/23/2026	View at CMS
1103447386	ABBVIE INC.	$22.20	05/10/2024	Food and Beverage	Undisputed	01/23/2026	View at CMS
1103447388	ABBVIE INC.	$6.97	08/16/2024	Food and Beverage	Undisputed	01/23/2026	View at CMS
1103447390	ABBVIE INC.	$10.47	08/27/2024	Food and Beverage	Undisputed	01/23/2026	View at CMS
1103447392	ABBVIE INC.	$13.02	09/05/2024	Food and Beverage	Undisputed	01/23/2026	View at CMS
1103447394	ABBVIE INC.	$10.03	09/20/2024	Food and Beverage	Undisputed	01/23/2026	View at CMS
1103447396	ABBVIE INC.	$10.59	11/01/2024	Food and Beverage	Undisputed	01/23/2026	View at CMS
1103447398	ABBVIE INC.	$13.79	11/22/2024	Food and Beverage	Undisputed	01/23/2026	View at CMS
1103447400	ABBVIE INC.	$16.09	11/26/2024	Food and Beverage	Undisputed	01/23/2026	View at CMS
1103447402	ABBVIE INC.	$14.90	12/13/2024	Food and Beverage	Undisputed	01/23/2026	View at CMS
1103447404	ABBVIE INC.	$11.64	12/20/2024	Food and Beverage	Undisputed	01/23/2026	View at CMS
1104453028	AstraZeneca Pharmaceuticals LP	$20.92	01/13/2024	Food and Beverage	Undisputed	01/23/2026	View at CMS
1113644397	Intercept Pharmaceuticals, Inc.	$17.68	08/28/2024	Food and Beverage	Undisputed	01/23/2026	View at CMS
1118329604	Cook Medical LLC	$23.49	05/31/2024	Food and Beverage	Undisputed	01/23/2026	View at CMS
1137508273	Takeda Pharmaceuticals U.S.A., Inc.	$6.62	01/19/2024	Food and Beverage	Undisputed	01/23/2026	View at CMS
1137508275	Takeda Pharmaceuticals U.S.A., Inc.	$19.48	01/19/2024	Food and Beverage	Undisputed	01/23/2026	View at CMS
1137508277	Takeda Pharmaceuticals U.S.A., Inc.	$24.86	03/08/2024	Food and Beverage	Undisputed	01/23/2026	View at CMS
1137508279	Takeda Pharmaceuticals U.S.A., Inc.	$3.52	03/11/2024	Food and Beverage	Undisputed	01/23/2026	View at CMS
1137508283	Takeda Pharmaceuticals U.S.A., Inc.	$10.18	05/31/2024	Food and Beverage	Undisputed	01/23/2026	View at CMS
1137508287	Takeda Pharmaceuticals U.S.A., Inc.	$1.33	05/31/2024	Food and Beverage	Undisputed	01/23/2026	View at CMS
1137508291	Takeda Pharmaceuticals U.S.A., Inc.	$9.50	08/29/2024	Food and Beverage	Undisputed	01/23/2026	View at CMS
1137508294	Takeda Pharmaceuticals U.S.A., Inc.	$16.38	09/23/2024	Food and Beverage	Undisputed	01/23/2026	View at CMS
1137508298	Takeda Pharmaceuticals U.S.A., Inc.	$16.85	10/29/2024	Food and Beverage	Undisputed	01/23/2026	View at CMS
1137508302	Takeda Pharmaceuticals U.S.A., Inc.	$23.37	10/30/2024	Food and Beverage	Undisputed	01/23/2026	View at CMS
1144163173	Madrigal Pharmaceuticals	$16.19	11/01/2024	Food and Beverage	Undisputed	01/23/2026	View at CMS
1146674792	Ardelyx, Inc.	$15.47	09/19/2024	Food and Beverage	Undisputed	01/23/2026	View at CMS
1146674794	Ardelyx, Inc.	$18.14	11/21/2024	Food and Beverage	Undisputed	01/23/2026	View at CMS
1147000781	AIMMUNE THERAPEUTICS, INC.	$14.13	08/20/2024	Food and Beverage	Undisputed	01/23/2026	View at CMS
1147000829	AIMMUNE THERAPEUTICS, INC.	$25.55	09/26/2024	Food and Beverage	Undisputed	01/23/2026	View at CMS
1147724096	QOL Medical, LLC	$17.64	08/26/2024	Food and Beverage	Undisputed	01/23/2026	View at CMS
1151048204	Phathom Pharmaceuticals, Inc.	$124.99	03/21/2024	Food and Beverage	Undisputed	01/23/2026	View at CMS
1151048206	Phathom Pharmaceuticals, Inc.	$3.90	08/12/2024	Food and Beverage	Undisputed	01/23/2026	View at CMS
1151048208	Phathom Pharmaceuticals, Inc.	$2.95	08/12/2024	Food and Beverage	Undisputed	01/23/2026	View at CMS
1151048210	Phathom Pharmaceuticals, Inc.	$14.09	10/30/2024	Food and Beverage	Undisputed	01/23/2026	View at CMS
1151048212	Phathom Pharmaceuticals, Inc.	$11.50	11/25/2024	Food and Beverage	Undisputed	01/23/2026	View at CMS
1151048214	Phathom Pharmaceuticals, Inc.	$10.41	12/16/2024	Food and Beverage	Undisputed	01/23/2026	View at CMS
1153545787	Salix Pharmaceuticals, a division of Bausch Health US, LLC	$16.93	11/06/2024	Food and Beverage	Undisputed	01/23/2026	View at CMS
1153552671	Salix Pharmaceuticals, a division of Bausch Health US, LLC	$15.83	08/21/2024	Food and Beverage	Undisputed	01/23/2026	View at CMS
1153584931	Salix Pharmaceuticals, a division of Bausch Health US, LLC	$21.77	07/09/2024	Food and Beverage	Undisputed	01/23/2026	View at CMS
1153666898	Salix Pharmaceuticals, a division of Bausch Health US, LLC	$14.76	03/27/2024	Food and Beverage	Undisputed	01/23/2026	View at CMS
1153685870	Salix Pharmaceuticals, a division of Bausch Health US, LLC	$13.23	10/23/2024	Food and Beverage	Undisputed	01/23/2026	View at CMS
1153719234	IRONWOOD PHARMACEUTICALS, INC	$13.72	08/12/2024	Food and Beverage	Undisputed	01/23/2026	View at CMS
1153727754	IRONWOOD PHARMACEUTICALS, INC	$17.76	09/03/2024	Food and Beverage	Undisputed	01/23/2026	View at CMS

Provenance & corrections

Dataset: CMS Open Payments — General Payments
Source: CMS Open Payments dataset (bulk file)
Publisher of source data: Centers for Medicare & Medicaid Services
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.