What is the Medicare Part D 'coverage gap' (donut hole) in the standard benefit structure?
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A
The period when a beneficiary pays 100% of drug costs after the deductible
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B
The phase between the initial coverage limit and catastrophic threshold where cost-sharing increases
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C
The gap in coverage between age 62 and age 65
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D
The period when Medicare stops paying until the beneficiary re-enrolls