Your case is going to be assigned to an arbitrator who is appointed to hear your case on behalf of the Illinois Worker's Compensation Commission. During the interim, your attorney is going to order certified copies of your medical records and your medical bills. The attorney will work with you and any other witnesses' testimony to be presented at arbitration. The insurance company for your employer may demand that you undergo what's called an independent medical examination. That's when the insurance company picks a doctor of their choosing to evaluate you and your claim and make an opinion as to whether or not your injuries were caused by your work accident.