Under Medicare Part D, each drug plan's formulary must include at least:

Why A is correct

Medicare Part D plans must maintain a formulary that includes at least two drugs in each therapeutic category and class of drugs. This minimum assures beneficiaries that their medication needs have a reasonable chance of being covered, while still allowing plans to manage costs through tiering and prior authorization. Plans are not required to cover every FDA-approved drug, and they must include both brand-name and generic drugs where available so that cost-conscious options exist within each class. Plans may use tiered formularies with lower cost-sharing for generics and preferred brands, but they must also provide an exceptions and appeals process for beneficiaries whose physicians recommend a non-covered drug.

Why the other options are wrong

• B) One drug total would not satisfy the two-drugs-per-class formulary requirement and would fail to cover beneficiaries' needs.
• C) Part D plans are not required to include every FDA-approved drug; they maintain a defined formulary.
• D) Formularies include both brand-name and generic drugs; they are not limited to generics.

Memory hook

Part D formulary = at least two drugs per class. A backup option is the law, not a courtesy.

Why A is correct

Part D plans must cover at least two drugs in each therapeutic category and class on their formularies. This protects beneficiaries by ensuring meaningful choice within each drug category while still allowing plans to manage costs through tiering and utilization controls. The two-drug-per-class minimum is a specific Part D rule tested on the A&H exam.

Why the other options are wrong

• B) A single drug per category is insufficient; the standard is at least two drugs in each category and class.
• C) Five drugs is not the statutory minimum; the requirement is two.
• 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 class = Part D's floor. Plans pick the list, but choice within a class is guaranteed.

Why A is correct

CMS requires every Medicare Part D plan formulary to include at least two drugs in each covered therapeutic category and pharmacologic class, ensuring beneficiaries have genuine choices within each drug class. Plans must also cover substantially all drugs in certain protected classes, such as antidepressants and antipsychotics. The two-drug-per-class floor is the minimum formulary standard, and it gives enrollees meaningful alternatives when a drug is changed or non-preferred. Option A correctly states this formulary requirement. The requirement ensures that when one drug is restricted or changed, the beneficiary still has an alternative within the same class.

Why the other options are wrong

• B) A single drug for the whole formulary would fail the two-drug-per-class requirement and would leave beneficiaries without any choice within a class. The two-drug-per-class floor is a statutory minimum that a single-drug formulary cannot meet.
• C) Plans are not required to cover every FDA-approved drug; they may design tiered formularies as long as the minimum class coverage standard is met. Formularies may be selective and tiered; full FDA coverage is never required.
• D) There is no ten-drugs-per-disease rule; the binding standard is at least two drugs per covered therapeutic category and pharmacologic class. The rule is stated in terms of therapeutic classes, not in a ten-drugs-per-disease figure.

Memory hook

Part D formularies must offer at least two per class — a floor, not a free-for-all, not an all-you-can-eat list.

Why C is correct

A Medicare Part D formulary is a list of covered drugs organized into tiers. By law, a Part D plan's formulary must include at least two drugs in each treatment category, but it is not required to include all drugs in that category. This standard ensures that beneficiaries have a meaningful choice of medications while allowing plans to negotiate lower prices. Plans must file their formularies annually and can change them during the year subject to CMS notice requirements.

Why the other options are wrong

• A) Plans are not required to cover every drug on the market; they must include at least two drugs per treatment category.
• B) Generic drugs are not excluded; formularies typically favor generics because they are less expensive.
• D) Formularies include brand-name and generic drugs, not brand-name drugs only.

Memory hook

Two drugs per category is the Part D floor. Plans can leave drugs out, but never an entire treatment class empty.

Why A is correct

CMS regulations require every Part D plan's formulary to include at least two drugs in each therapeutic category and class, so beneficiaries have a genuine choice of treatment within each disease area. Plans may use tiers and utilization management such as prior authorization and step therapy, but the two-drug minimum protects access. A formulary is not required to cover every FDA-approved drug, and plans routinely cover generic and brand products together. The two-drug-per-class minimum is the precise formulary standard tested in the Medicare Part D section of the senior health products outline.

Why the other options are wrong

• B) One drug per class is below the statutory minimum of two.
• C) Formularies include generics and brands; they are not brand-only.
• D) No plan covers every FDA-approved drug; formularies are selective by design.

Memory hook

Part D formularies: at least two drugs in every therapeutic class.