Amends the Illinois Insurance Code. Provides that a group or individual plan of accident and health insurance or managed care plan amended, delivered, issued, or renewed on or after January 1, 2027 shall provide coverage for medically prescribed seizure detection devices. Requires all covered seizure detection devices to be approved for use by individuals, and for the choice of device to be made based upon the individual's circumstances and medical needs in consultation with the individual's medical provider. Sets forth provisions prohibiting prior authorization and cost-sharing, as specified. Amends the State Employees Group Insurance Act of 1971, the Counties Code, the Illinois Municipal Code, the School Code, the Health Maintenance Organization Act, the Limited Health Service Organization Act, the Voluntary Health Services Plans Act, and the Illinois Public Aid Code to require coverage under the provisions of those Acts. Effective immediately.