Physician profile

Mark Andrew Walshauser

Hematology & Oncology · O Fallon, IL

NPI 1306020664

$23,791.02

in general payments reported to CMS, 2019-2025

69 companies · $2,101 in 2025

The $2,101 reported for 2025 was more than what a typical Hematology & Oncology provider received nationally (typical 2025 total: $686).

See the full distribution for Hematology & Oncology

Payments by year

General payments by program year, as reported to CMS.

What the payments were for

Nature of payment as categorized by the reporting companies: meals, consulting, travel, and so on.

View as a table
Payment typeAmount (2023-2025)
Food and Beverage$6,996.21
Consulting Fee$6,484.00
Education$199.03

Payment-type detail covers 2023-2025; earlier years are included in totals but not broken out here.

Who reported paying

General payments only, as reported to CMS. Product names cover 2023-2025.

CompanyGeneral paymentsYearsTop products
Regeneron Pharmaceuticals, INC. $3,832.62 2023-2024 Libtayo
E.R. Squibb & Sons, L.L.C. $2,960.67 2019-2025 Opdivo, Opdualag, Pomalyst
Beigene USA, INC. $2,448.94 2023-2024 Brukinsa
Novartis Pharmaceuticals Corporation $1,268.34 2019-2025
Pfizer INC. $1,229.81 2019-2025
Astrazeneca Pharmaceuticals LP $942.79 2019-2025 Imfinzi, Enhertu, Lynparza
Janssen Biotech, INC. $799.82 2019-2025 Rybrevant, Talvey, Tecvayli
Merck Sharp & Dohme LLC $754.12 2019-2025 Keytruda, Lynparza, Welireg
Genzyme Corporation $612.11 2019-2025
Genentech USA, INC. $500.32 2019-2025 Polivy, Lunsumio, Columvi
Bayer Healthcare Pharmaceuticals INC. $485.42 2019-2025
Amgen INC. $451.96 2019-2023 Kyprolis, Blincyto, Mvasi
Beigene, LTD. $450.00 2020
Exelixis INC. $431.27 2019-2025 Cabometyx
Abbvie INC. $362.35 2019-2025
Show all 69 companies
CompanyGeneral paymentsYearsTop products
Celgene Corporation $360.03 2019-2025 Reblozyl, Pomalyst, Opdualag
Cardinal Health 108 LLC $350.82 2024-2025
Seagen INC. $334.42 2019-2025 Tukysa
Gilead Sciences, INC. $333.64 2019-2025 Trodelvy
Foundation Medicine, INC. $323.61 2019-2023
Incyte Corporation $310.75 2019-2025 Monjuvi, Pemazyre, Jakafi
Emd Serono, INC. $307.83 2019-2025 Bavencio, Tepmetko
Takeda Pharmaceuticals U.S.A., INC. $300.75 2019-2025 Iclusig, Fruzaqla, Alunbrig
Asd Specialty Healthcare, LLC $289.63 2022-2024
Astellas Pharma US INC $284.20 2019-2025 Xospata, Vyloy
Pharmacyclics LLC, An Abbvie Company $258.88 2019-2023 Imbruvica
US Oncology Corporate, INC. $217.99 2024
Agios Pharmaceuticals, INC. $186.69 2019
Genmab U.S., INC. $173.47 2023-2024 Epkinly, Tivdak
Lilly USA, LLC $161.68 2019-2022
Rigel Pharmaceuticals, INC. $161.17 2019-2024 Rezlidhia, Tavalisse
Aveo Pharmaceuticals, INC. $159.90 2022-2025
Eisai INC. $131.18 2019-2022
Adaptive Biotechnologies Corporation $128.40 2022-2025 Clonoseq
Array Biopharma INC $126.80 2021-2025 Mektovi, Braftovi, Lorbrena
Glaxosmithkline, LLC. $92.73 2022-2025 Ojjaara, Zejula, Jemperli
Servier Pharmaceuticals LLC $89.86 2021-2025
Clovis Oncology, INC. $86.75 2019-2020
Jazz Pharmaceuticals INC. $85.08 2019-2021
Sobi, INC $77.35 2021-2024
Daiichi Sankyo INC. $74.28 2019-2024 Injectafer
Alexion Pharmaceuticals, INC. $67.36 2019-2025 Ultomiris
Deciphera Pharmaceuticals INC. $62.44 2021-2025 Qinlock
G1 Therapeutics, INC. $57.05 2022-2023 Cosela
Kite Pharma, INC. $54.66 2021-2023
Karyopharm Therapeutics INC. $44.36 2022
Boehringer Ingelheim Pharmaceuticals, INC. $41.82 2023-2025 Gilotrif
Regeneron Healthcare Solutions, INC. $40.06 2022-2024 Libtayo
Tersera Therapeutics LLC $39.03 2023-2025 Zoladex
Kyowa Kirin, INC. $34.23 2025
Lexicon Pharmaceuticals, INC. $33.86 2019-2020
Mylan Institutional INC. $32.42 2019-2022
Adc Therapeutics America, INC. $31.99 2022-2023
Novocure INC. $31.38 2021-2025 Optune Lua (Novottf-200t)
Janssen Pharmaceuticals, INC $25.57 2019
Morphosys, US INC. $23.47 2021
Amag Pharmaceuticals, INC. $21.71 2019
Tesaro, INC. $20.39 2019
Taiho Oncology, INC. $20.22 2019
Blueprint Medicines Corporation $20.15 2023 Ayvakit
Corcept Therapeutics $19.65 2025 Korlym
Spectrum Pharmaceuticals INC. $19.40 2025 Rolvedon
Pharmacosmos Therapeutics INC. $18.94 2024 Monoferric
Otsuka America Pharmaceutical, INC. $18.36 2019
Stemline Therapeutics INC. $16.53 2023 Orserdu
Verastem, INC. $16.07 2019
Puma Biotechnology, INC. $14.99 2019
Helsinn Therapeutics (U.S.), INC. $13.34 2022
Pharmaessentia USA Corporation $13.14 2023 Besremi

Drugs and devices associated with these payments

CMS records which products a payment was associated with, not how the money was allocated. Association is not allocation: one payment can be associated with several products, and a product listing does not mean the payment was made because of that product. Product detail covers 2023-2025.

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Payment summary

Mark Andrew Walshauser

$23,791.02

in general payments reported 2019-2025

Years
2019-2025
Top company
Regeneron Pharmaceuticals, INC.
Context
The $2,101 reported for 2025 was more than what a typical Hematology & Oncology provider received nationally (typical 2025 total: $686).

https://glasscript.com/doctor/798126/mark-andrew-walshauser

Source: CMS Open Payments, program years 2019-2025. Payments are legal and often routine.

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Source: CMS Open Payments, program years 2019-2025, as reported to CMS by drug and device makers (published June 30, 2026). Drug and device detail covers 2023-2025.