Definitions for "Coverage Gap"
the gap in coverage when the enrollee has to pay 100% of the discounted price. It is the period after an enrollee's drug spending exceeds the initial coverage limit and before the enrollee's out-of-pocket expenses reach the TrOOP limit. This is referred to as the donut hole or coverage gap.
A name for the step in a standard Medicare drug plan in which you pay 100% of your expenses for eligible drugs, until your out-of-pocket drug costs have reached $3,600. Some people call this step the "doughnut hole."
After the member and the insurance plan have together paid for $2,250 in drug costs, the member must pay 100% of the drug costs, until the total out-of-pocket cost for the member reach $3,600. This time is referred to as the coverage gap, since the member is paying 100% of the costs.