Letter of Submission Template. Please complete every item on claim form.This completed form, together with the itemized bills, should be submitted to: Blue Cross and Blue Shield of Illinois. How do I file a claim? You can download and fill out a form, called the Patient Request for Medical Payment form (CMS-1490S). To obtain an SR-22, you must contact an insurance company authorized to write SR-22 policies for Illinois. Check a Claim's Status. Check a Claim's Status. When you submit your own claim to Medicare, complete the entire form. You can find the billing codes you need for specific services in the fee schedules.