Medical Expense✓ Verified · outline & fact-checked · Sep 2026Difficulty 2/5
Under Medicare Part D rules, a plan's formulary must include at least:
Select an option to reveal the answer and the full 3-part explanation — free, no signup.
Answer & full 3-part explanation (select an option above, or peek)
Why A is correct
Part D plans maintain formularies that must include at least two drugs in each therapeutic category and class, ensuring access to a meaningful range of treatments. Plans may use tiered cost-sharing and prior authorization, but the minimum formulary standard protects beneficiaries from plans that offer too narrow a drug list.
Why the other options are wrong
- B) A single drug for the whole plan would fail the two-drugs-per-class requirement.
- C) Plans must include both brand-name and generic drugs across categories, not generics only.
- D) Plans are not required to cover every FDA-approved drug; formularies are selective but must meet the two-drug minimum per class.
Memory hook
Two drugs per therapeutic class — the Part D formulary floor.