First and most importantly, do not fail to appear for the exam. The VA schedules future exams for certain conditions that a veteran has that may have a probability for improvement in their severity. Should you fail to appear for the exam, the VA will reduce the percentage for that condition, which could impact your total compensation. If you have a relationship with a VSO, you should contact them immediately to find out what the exam is for, why the exam was scheduled, and how to fulfill the requirements of the exam.