Amends the Illinois Insurance Code. Provides that each insurer shall make available on its publicly accessible website or through a toll-free telephone number an interactive mechanism where any member of the public may access specified health care cost information. Provides that the Department of Insurance shall adopt rules to define specified terms. Provides that an insurer shall provide notification on its website that the actual amount that a covered person will be responsible to pay following the receipt of a particular health care service may vary due to unforeseen costs that arise during the provision of the service. Provides that each estimate of out-of-pocket costs provided shall provide the out-of-pocket costs a covered person may owe if he or she has exceeded his or her deductible and the out-of-pocket costs a covered person may owe if he or she has not exceeded his or her deductible. Provides that an insurer may contract with a third party to satisfy part or all of the requirements. Provides that nothing in the provisions shall prohibit an insurer from charging a covered person cost sharing beyond that included in the estimate provided if the additional cost sharing resulted from unforeseen provisions of additional health care services and the cost-sharing requirements of the unforeseen health care services were disclosed in the covered person’s policy or certificate of insurance. Provides that some of the provisions do not apply to a health maintenance organization.