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Bassim Assioun Nephrology (Internal Medicine) · O Fallon, IL

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Data: CMS Open Payments, program years 2019-2025, as reported to CMS by drug and device makers (published June 30, 2026). Payments are legal and often routine: context on every page. GlassScript is independent and is not affiliated with CMS. Not medical, legal, or financial advice. Official source ↗