Covered recipient · General Payments record

MARK ANDREW WALSHAUSER

Allopathic & Osteopathic Physicians Internal Medicine Hematology & Oncology

NPI: 1306020664
CMS profile: 798126
Location: O FALLON, IL

General Payments · PY2018–2024

$24,857.83

Reported across 782 records
CMS publication 2026-01-23

Latest program year · PY2024

$9,264.75

93 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
Consulting Fee	$6,484.00	5
Food and Beverage	$2,690.76	87
Education	$89.99	1

By paying entity

PY2024 · sorted by reported total

Paying entity	Amount	Records
Regeneron Pharmaceuticals, Inc.	$3,684.00	3
BeiGene USA, Inc.	$2,322.03	2
Acerta Pharma LLC	$605.50	5
PFIZER INC.	$353.04	12
E.R. Squibb & Sons, L.L.C.	$249.39	8
Bayer HealthCare Pharmaceuticals Inc.	$234.46	6
US Oncology Corporate, Inc.	$217.99	1
NOVARTIS PHARMACEUTICALS CORPORATION	$180.19	9
CARDINAL HEALTH 108 LLC	$159.48	1
Merck Sharp & Dohme Corporation	$152.20	7
Astellas Pharma US Inc	$149.41	3
Genmab U.S., Inc.	$147.85	1
ASD SPECIALTY HEALTHCARE, LLC	$103.13	1
ABBVIE INC.	$99.92	4
GENZYME CORPORATION	$72.88	3
Janssen Biotech, Inc.	$71.72	4
Takeda Pharmaceuticals U.S.A., Inc.	$68.03	3
Gilead Sciences, Inc.	$54.32	3
Rigel Pharmaceuticals, Inc.	$47.90	3
Genentech USA, Inc.	$46.07	2
Celgene Corporation	$40.07	2
SOBI, INC	$38.37	2
GlaxoSmithKline, LLC.	$37.62	2
Daiichi Sankyo Inc.	$33.90	1
Adaptive Biotechnologies Corporation	$21.72	1
Incyte Corporation	$19.17	1
Pharmacosmos Therapeutics Inc.	$18.94	1
Regeneron Healthcare Solutions, Inc.	$18.35	1
SERVIER PHARMACEUTICALS LLC	$17.10	1

By program year

All program years on this page · sorted by year

Program year	Amount	Records
PY2018	$3,167.86	199
PY2019	$2,996.01	189
PY2020	$3,425.56	44
PY2021	$855.21	49
PY2022	$2,835.00	112
PY2023	$2,313.44	96
PY2024	$9,264.75	93

Payment records · PY2024 (93)

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.	$20.31	03/15/2024	Food and Beverage	Undisputed	01/23/2026	1106302717	CMS
ABBVIE INC.	$28.91	06/01/2024	Food and Beverage	Undisputed	01/23/2026	1106302719	CMS
ABBVIE INC.	$30.53	06/17/2024	Food and Beverage	Undisputed	01/23/2026	1106302721	CMS
ABBVIE INC.	$20.17	07/18/2024	Food and Beverage	Undisputed	01/23/2026	1106302723	CMS
Adaptive Biotechnologies Corporation	$21.72	06/26/2024	Food and Beverage	Undisputed	01/23/2026	1150261626	CMS
ASD Specialty Healthcare, LLC	$103.13	11/05/2024	Food and Beverage	Undisputed	01/23/2026	1151420140	CMS
Astellas Pharma US Inc	$28.94	02/13/2024	Food and Beverage	Undisputed	01/23/2026	1139294380	CMS
Astellas Pharma US Inc	$30.48	10/07/2024	Food and Beverage	Undisputed	01/23/2026	1139413933	CMS
Astellas Pharma US Inc	$89.99	11/01/2024	Education	Undisputed	01/23/2026	1139437776	CMS
AstraZeneca Pharmaceuticals LP	$12.11	01/11/2024	Food and Beverage	Undisputed	01/23/2026	1104285852	CMS
AstraZeneca Pharmaceuticals LP	$525.00	02/14/2024	Consulting Fee	Undisputed	01/23/2026	1105647846	CMS
AstraZeneca Pharmaceuticals LP	$19.32	04/01/2024	Food and Beverage	Undisputed	01/23/2026	1104774404	CMS
AstraZeneca Pharmaceuticals LP	$30.42	07/26/2024	Food and Beverage	Undisputed	01/23/2026	1105459916	CMS
AstraZeneca Pharmaceuticals LP	$18.65	10/28/2024	Food and Beverage	Undisputed	01/23/2026	1105447611	CMS
Bayer Healthcare Pharmaceuticals Inc.	$4.94	02/05/2024	Food and Beverage	Undisputed	01/23/2026	1086081618	CMS
Bayer Healthcare Pharmaceuticals Inc.	$29.45	05/01/2024	Food and Beverage	Undisputed	01/23/2026	1086243730	CMS
Bayer Healthcare Pharmaceuticals Inc.	$147.46	06/02/2024	Food and Beverage	Undisputed	01/23/2026	1086143037	CMS
Bayer Healthcare Pharmaceuticals Inc.	$20.83	07/01/2024	Food and Beverage	Undisputed	01/23/2026	1086252872	CMS
Bayer Healthcare Pharmaceuticals Inc.	$5.72	08/12/2024	Food and Beverage	Undisputed	01/23/2026	1086083709	CMS
Bayer Healthcare Pharmaceuticals Inc.	$26.06	11/22/2024	Food and Beverage	Undisputed	01/23/2026	1086218569	CMS
BeiGene USA, Inc.	$47.03	05/08/2024	Food and Beverage	Undisputed	01/23/2026	1120857895	CMS
BeiGene USA, Inc.	$2,275.00	05/24/2024	Consulting Fee	Undisputed	01/23/2026	1120857893	CMS
Cardinal Health 108 LLC	$159.48	10/29/2024	Food and Beverage	Undisputed	01/23/2026	1100222941	CMS
Celgene Corporation	$20.31	03/11/2024	Food and Beverage	Undisputed	01/23/2026	1101198072	CMS
Celgene Corporation	$19.76	06/28/2024	Food and Beverage	Undisputed	01/23/2026	1101198086	CMS
Daiichi Sankyo Inc.	$33.90	02/10/2024	Food and Beverage	Undisputed	01/23/2026	1089496194	CMS
E.R. Squibb & Sons, L.L.C.	$22.80	01/11/2024	Food and Beverage	Undisputed	01/23/2026	1101865012	CMS
E.R. Squibb & Sons, L.L.C.	$11.53	02/05/2024	Food and Beverage	Undisputed	01/23/2026	1101865023	CMS
E.R. Squibb & Sons, L.L.C.	$16.44	04/10/2024	Food and Beverage	Undisputed	01/23/2026	1101865041	CMS
E.R. Squibb & Sons, L.L.C.	$125.81	04/11/2024	Food and Beverage	Undisputed	01/23/2026	1101865045	CMS
E.R. Squibb & Sons, L.L.C.	$15.47	05/09/2024	Food and Beverage	Undisputed	01/23/2026	1101865060	CMS
E.R. Squibb & Sons, L.L.C.	$23.97	06/05/2024	Food and Beverage	Undisputed	01/23/2026	1101865067	CMS
E.R. Squibb & Sons, L.L.C.	$23.38	08/21/2024	Food and Beverage	Undisputed	01/23/2026	1101865130	CMS
E.R. Squibb & Sons, L.L.C.	$9.99	12/16/2024	Food and Beverage	Undisputed	01/23/2026	1101865223	CMS
Genentech USA, Inc.	$21.08	03/04/2024	Food and Beverage	Undisputed	01/23/2026	1133063417	CMS
Genentech USA, Inc.	$24.99	09/16/2024	Food and Beverage	Undisputed	01/23/2026	1133063413	CMS
Genmab U.S., Inc.	$147.85	05/31/2024	Food and Beverage	Undisputed	01/23/2026	1126829474	CMS
GENZYME CORPORATION	$22.62	02/16/2024	Food and Beverage	Undisputed	01/23/2026	1139795486	CMS
GENZYME CORPORATION	$24.82	05/13/2024	Food and Beverage	Undisputed	01/23/2026	1139795506	CMS
GENZYME CORPORATION	$25.44	08/06/2024	Food and Beverage	Undisputed	01/23/2026	1139795544	CMS
Gilead Sciences, Inc.	$16.41	01/31/2024	Food and Beverage	Undisputed	01/23/2026	1133800982	CMS
Gilead Sciences, Inc.	$20.10	08/27/2024	Food and Beverage	Undisputed	01/23/2026	1133800984	CMS
Gilead Sciences, Inc.	$17.81	12/04/2024	Food and Beverage	Undisputed	01/23/2026	1133800986	CMS
GlaxoSmithKline, LLC.	$16.07	11/04/2024	Food and Beverage	Undisputed	01/23/2026	1116519702	CMS
GlaxoSmithKline, LLC.	$21.55	11/16/2024	Food and Beverage	Undisputed	01/23/2026	1116557845	CMS
Incyte Corporation	$19.17	07/16/2024	Food and Beverage	Undisputed	01/23/2026	1141183438	CMS
Janssen Biotech, Inc.	$14.69	05/29/2024	Food and Beverage	Undisputed	01/23/2026	1078599506	CMS
Janssen Biotech, Inc.	$19.36	06/12/2024	Food and Beverage	Undisputed	01/23/2026	1078599451	CMS
Janssen Biotech, Inc.	$18.22	10/02/2024	Food and Beverage	Undisputed	01/23/2026	1078599514	CMS
Janssen Biotech, Inc.	$19.45	10/23/2024	Food and Beverage	Undisputed	01/23/2026	1078599579	CMS
Merck Sharp & Dohme LLC	$22.05	01/12/2024	Food and Beverage	Undisputed	01/23/2026	1141729620	CMS
Merck Sharp & Dohme LLC	$23.76	01/15/2024	Food and Beverage	Undisputed	01/23/2026	1141729616	CMS
Merck Sharp & Dohme LLC	$8.03	05/10/2024	Food and Beverage	Undisputed	01/23/2026	1141882442	CMS
Merck Sharp & Dohme LLC	$26.58	05/17/2024	Food and Beverage	Undisputed	01/23/2026	1141729618	CMS
Merck Sharp & Dohme LLC	$14.18	05/24/2024	Food and Beverage	Undisputed	01/23/2026	1141729614	CMS
Merck Sharp & Dohme LLC	$25.13	08/28/2024	Food and Beverage	Undisputed	01/23/2026	1141882444	CMS
Merck Sharp & Dohme LLC	$32.47	10/11/2024	Food and Beverage	Undisputed	01/23/2026	1141729612	CMS
Novartis Pharmaceuticals Corporation	$22.60	01/17/2024	Food and Beverage	Undisputed	01/23/2026	1087403584	CMS
Novartis Pharmaceuticals Corporation	$20.05	04/05/2024	Food and Beverage	Undisputed	01/23/2026	1087403588	CMS
Novartis Pharmaceuticals Corporation	$12.63	04/26/2024	Food and Beverage	Undisputed	01/23/2026	1087403590	CMS
Novartis Pharmaceuticals Corporation	$0.17	04/26/2024	Food and Beverage	Undisputed	01/23/2026	1087403592	CMS
Novartis Pharmaceuticals Corporation	$24.39	07/19/2024	Food and Beverage	Undisputed	01/23/2026	1087403596	CMS
Novartis Pharmaceuticals Corporation	$20.28	09/19/2024	Food and Beverage	Undisputed	01/23/2026	1087403598	CMS
Novartis Pharmaceuticals Corporation	$25.38	10/25/2024	Food and Beverage	Undisputed	01/23/2026	1087403600	CMS
Novartis Pharmaceuticals Corporation	$24.86	11/11/2024	Food and Beverage	Undisputed	01/23/2026	1087403602	CMS
Novartis Pharmaceuticals Corporation	$29.83	12/02/2024	Food and Beverage	Undisputed	01/23/2026	1087403604	CMS
PFIZER INC.	$23.06	01/21/2024	Food and Beverage	Undisputed	01/23/2026	1131446319	CMS
PFIZER INC.	$20.04	01/29/2024	Food and Beverage	Undisputed	01/23/2026	1131528648	CMS
PFIZER INC.	$19.42	02/07/2024	Food and Beverage	Undisputed	01/23/2026	1131440916	CMS
PFIZER INC.	$14.15	03/07/2024	Food and Beverage	Undisputed	01/23/2026	1131526399	CMS
PFIZER INC.	$6.62	03/21/2024	Food and Beverage	Undisputed	01/23/2026	1131542119	CMS
PFIZER INC.	$16.29	04/03/2024	Food and Beverage	Undisputed	01/23/2026	1131452946	CMS
PFIZER INC.	$23.38	04/12/2024	Food and Beverage	Undisputed	01/23/2026	1131504717	CMS
PFIZER INC.	$15.01	04/28/2024	Food and Beverage	Undisputed	01/23/2026	1131452147	CMS
PFIZER INC.	$143.49	06/02/2024	Food and Beverage	Undisputed	01/23/2026	1131571834	CMS
PFIZER INC.	$38.96	06/03/2024	Food and Beverage	Undisputed	01/23/2026	1131545743	CMS
PFIZER INC.	$21.25	09/09/2024	Food and Beverage	Undisputed	01/23/2026	1131497598	CMS
PFIZER INC.	$11.37	10/28/2024	Food and Beverage	Undisputed	01/23/2026	1131516625	CMS
Pharmacosmos Therapeutics Inc.	$18.94	08/23/2024	Food and Beverage	Undisputed	01/23/2026	1154826889	CMS
Regeneron Healthcare Solutions, Inc.	$18.35	07/08/2024	Food and Beverage	Undisputed	01/23/2026	1114243990	CMS
Regeneron Pharmaceuticals, Inc.	$614.00	03/01/2024	Consulting Fee	Undisputed	01/23/2026	1114406387	CMS
Regeneron Pharmaceuticals, Inc.	$1,842.00	03/01/2024	Consulting Fee	Undisputed	01/23/2026	1114406389	CMS
Regeneron Pharmaceuticals, Inc.	$1,228.00	03/01/2024	Consulting Fee	Undisputed	01/23/2026	1114406391	CMS
Rigel Pharmaceuticals, Inc.	$16.47	06/10/2024	Food and Beverage	Undisputed	01/23/2026	1145202082	CMS
Rigel Pharmaceuticals, Inc.	$15.83	08/12/2024	Food and Beverage	Undisputed	01/23/2026	1145204582	CMS
Rigel Pharmaceuticals, Inc.	$15.60	11/25/2024	Food and Beverage	Undisputed	01/23/2026	1145208163	CMS
SERVIER PHARMACEUTICALS LLC	$17.10	05/08/2024	Food and Beverage	Undisputed	01/23/2026	1147261694	CMS
SOBI, INC	$19.97	03/29/2024	Food and Beverage	Undisputed	01/23/2026	1141418864	CMS
SOBI, INC	$18.40	09/18/2024	Food and Beverage	Undisputed	01/23/2026	1141410674	CMS
Takeda Pharmaceuticals U.S.A., Inc.	$16.35	02/26/2024	Food and Beverage	Undisputed	01/23/2026	1144969841	CMS
Takeda Pharmaceuticals U.S.A., Inc.	$35.16	05/15/2024	Food and Beverage	Undisputed	01/23/2026	1144969843	CMS
Takeda Pharmaceuticals U.S.A., Inc.	$16.52	06/07/2024	Food and Beverage	Undisputed	01/23/2026	1144969845	CMS
US Oncology Corporate, Inc.	$217.99	04/22/2024	Food and Beverage	Undisputed	01/23/2026	1084863472	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.