Medical Expense✓ Verified · outline & fact-checked · Sep 2026Difficulty 2/5
Under Medicare Part D, a plan's formulary must include:
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 D is correct
Medicare Part D formularies must include at least two drugs in each therapeutic category and class so that beneficiaries have a meaningful choice of treatment within each category. The formulary must also be non-discriminatory and provide adequate coverage across the classes. Plans may use tiered cost-sharing and step therapy, but the two-drug minimum helps ensure that common conditions can be treated without unreasonable formulary gaps.
Why the other options are wrong
- A) A single drug per class is insufficient; the minimum requirement is two drugs in each category and class.
- B) Part D plans are not required to carry every FDA-approved drug; they maintain selective formularies that still meet the two-drug minimum.
- C) Formularies may include brand-name drugs as well as generics; the requirement is not limited to generic products.
Memory hook
Part D formulary floor: at least 2 drugs per therapeutic class. Choice, not a one-size drug shelf.