Medical Expense✓ Verified · outline & fact-checked · Sep 2026Difficulty 1/5
A Medicare Part D plan's formulary must include:
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Answer & full 3-part explanation (select an option above, or peek)
Why A is correct
The Centers for Medicare & Medicaid Services requires Part D formularies to include at least two drugs in each therapeutic category and class, with exceptions for certain protected classes that must include substantially all drugs. This breadth requirement ensures beneficiaries have meaningful access to treatment across disease categories while still allowing plans to manage costs through tiers and utilization controls. The formulary minimum is part of the Part D coverage rules examined under AH-III.D.1g, which also cover the coverage gap and catastrophic coverage.
Why the other options are wrong
- B) Formularies include generics as well as brand-name drugs; generic availability helps control premiums.
- C) No plan covers every marketed drug; formularies are managed lists of covered drugs.
- D) The rule requires at least two drugs per class, not a maximum of one.
Memory hook
Two drugs per class is the Part D formulary floor, not a pharmacy free-for-all.