Report: Illinois has lowest Medicaid disenrollment rates Ryan Voyles 1 year ago Illinois has the lowest Medicaid disenrollment rate among states for those so far affected by the return of the redetermination process, according to recent data published by KFF.To access this content, you must purchase 1 Year Health News Illinois Subscription or 1 Year Group Subscription - Up to 5 Users, or log in if you are a member.