Which of the following lists drug tiers from least expensive cost share to most expensive cost share?

The correct choice lists the drug tiers from least expensive cost share to most expensive cost share as follows: Preferred Generics, Generics, Preferred Brand, and Non-Preferred Drug.

This hierarchy reflects a common structure utilized in pharmaceutical benefit plans. Preferred Generics are typically the least expensive, as they consist of medications that are both lower in cost and widely supported by insurance plans due to their effectiveness and availability. Next are Generics, which are generally affordable but may not have the same designation as "preferred," meaning they could have a slightly higher cost share.

Preferred Brand medications come next, as they are brand-name drugs that insurance companies have negotiated lower prices for due to formulary agreements. They are more expensive than generics but are still considered to have a favorable pricing structure due to their negotiated status by the healthcare provider. Lastly, Non-Preferred Drugs are at the highest cost share level because they are often brand-name medications that do not have preferred status, leading to higher out-of-pocket expenses for patients.

Thus, the correct answer properly categorizes the medications according to their typical cost sharing and the negotiation status of the medications within insurance plans.