The Centers for Medicare and Medicaid Services (CMS) annually collects child Medicaid enrollment and utilization data on reports known as “CMS Form 416.” Illinois has completed reports for every year since 1999, allowing insight into utilization trends over time.
The forms initially monitored utilization of three measures: preventive, treatment, and any dental services. Beginning in 2010 four additional measures were added. The formula for calculating utilization also changed in 2010, moving from a count of all persons enrolled who received the service to a count of all people enrolled for 90 continuous days who received the service. We reflect this change as a line break in the charts below.