Under Medicare's prescription drug plan, your True Out-of-Pocket Costs (TrOOP) are the portion of your expenses that count toward your annual Medicare drug plan threshold (also called the "donut hole"). The amount of the threshold may change each year, and determines when a person's catastrophic prescription drug coverage starts. Only certain expenses count toward TrOOP, so if you are unsure whether or not an expense should be counted toward your TrOOP, contact one of our customer service representatives. You should not attempt to manipulate your TrOOP costs in order to bridge the coverage gap (or donut hole) and reach catastrophic coverage before you are truly eligible. This may be viewed as fraud and could lead to an investigation.