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A patient stays in the hospital for days, and every one of those days needs its own subsequent care code — but not every day looks the same on paper. This guide breaks down CPT 99232, how it compares to 99231 and 99233, MDM and time-based reporting, common billing mistakes, and a pre-submission checklist for hospital billing teams.

Two physicians see the same inpatient on the same day which one gets modifier 25? A patient looks sicker today but the note doesn't support high MDM is it still 99233? This 2026 guide breaks down exactly how CPT 99231, 99232, and 99233 are selected by MDM or time, not clinical impression, and the billing mistakes that quietly cost hospital-based practices real revenue.