Medical Expense✓ Verified · outline & fact-checked · Sep 2026Difficulty 2/5
In Medicare Part D, what is the 'coverage gap' (often called the donut hole)?
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Answer & full 3-part explanation (select an option above, or peek)
Why A is correct
The Part D coverage gap is the stage between the initial coverage limit and the catastrophic coverage threshold, where the beneficiary bears a higher share of prescription costs. Once spending reaches the catastrophic threshold, cost-sharing drops dramatically. Recent law changes have narrowed the gap, but the structure — initial coverage → coverage gap → catastrophic coverage — remains a tested Part D concept.
Why the other options are wrong
- B) The gap is the stage where the beneficiary's cost share RISES, not a stage where Part D pays everything.
- C) The 7-month window is an enrollment window — Part B and Part D each have a 7-month Initial Enrollment Period; the coverage gap is a Part D cost phase, not an enrollment window.
- D) The coverage gap is about drug cost phases, not provider networks or pharmacies.
Memory hook
Donut hole = the middle of the Part D ride where you pay more. Get through it and catastrophic coverage lowers the fare.