Some Medicare Part D plans (prescription drug coverage) might have a coverage gap. This coverage gap is often called the "Medicare Donut Hole." The donut hole occurs when you have spent a certain amount of money on prescription drugs. In 2016, for example, the coverage gap begins at $3,310. This mean, once you and your Medicare Part D plan have spent $3,310 on prescription drugs, you are in the donut hole. If you're in the Medicare donut hole, you pay for your prescription dr