Before revision: The Medicare Part D coverage gap (informally known as the Medicare doughnut hole) is a period of consumer payment for prescription medication costs which lies between the initial coverage limit and the catastrophic-coverage threshold , when the consumer is a member of a Medicare Part D prescription-drug program administered by the United States federal government.
After revision: The Medicare Part D coverage gap (informally known as the Medicare doughnut hole) is a period of consumer payment for prescription medication costs that lies between the initial coverage limit and the catastrophic coverage threshold when the consumer is a member of a Medicare Part D prescription-drug program administered by the United States federal government.