RB6_9   A hospital readmission occurs when a patient is admitted to a hospital within a specified time period after being discharged from an earlier hospitalization. CMS data from the Fee-for-Service Geographic Variation Public Use File were used to tabulate all-cause 30-day hospital readmission rates for Illinois counties. Data analysis indicates that overall, during the period 2007-2022, the nonmetro registered higher reductions in hospital readmissions than the metro.