From Medicare.gov

A period of time in which you pay higher cost sharing for prescription drugs until you spend enough to qualify for catastrophic coverage. The coverage gap (also called the “donut hole”) starts when you and your plan have paid a set dollar amount for prescription drugs during that year.

RaphaelFrom Medicare.gov A period of time in which you pay higher cost sharing for prescription drugs until you spend enough to qualify for catastrophic coverage. The coverage gap (also called the “donut hole”) starts when you and your plan have paid a set dollar amount for prescription drugs during that...Making Senior Health Simple« Back to Glossary Index