2025 Coinsurance Lifetime Reserve Days 2025. In 2025, beneficiaries must pay a coinsurance amount of $408 per day for the 61st through 90th day of a hospitalization ($400 in 2023) in a benefit period and $816 per day for lifetime reserve. These amounts are now known as the kx modifier thresholds.
In 2025, beneficiaries must pay a coinsurance amount of $408 per day for the 61 st through 90 th day of a hospitalization ($400 in 2023) in a benefit period and $816 per day for. Original medicare covers up to 90 days of inpatient hospital care each benefit period.