Medical Expense✓ Verified · outline & fact-checked · Sep 2026Difficulty 2/5
Under Medicare Part D rules, each 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 A is correct
Medicare Part D plans maintain a formulary, or list of covered drugs. The law requires each Part D formulary to include at least two drugs in each therapeutic category and class — a minimum coverage standard designed to ensure beneficiaries have meaningful drug choices. Plans may structure tiers and use prior authorization, but the two-drug minimum per category and class is a core regulatory requirement tested in the Part D objectives.
Why the other options are wrong
- B) Part D formularies must include both generic and brand-name drugs; excluding generics entirely would violate the coverage standards.
- C) Plans are not required to cover every FDA-approved drug; they cover a representative set within each class.
- D) The formulary requirement concerns drug classes, not a comparison to Part B-covered drugs.
Memory hook
Every Part D formulary keeps at least two options per drug class — you are never down to a one-drug monopoly.