Which of the following is not a type of formulary?

The correct choice indicates that all the provided options indeed describe types of formularies. Formularies are structured lists of medications that are covered by a particular drug benefit plan, and they can come in various forms based on how medications are categorized and what access restrictions are in place.

The first option describes a closed formulary with a three-tier system where generics are placed on Tier 1. This configuration typically means that the most cost-effective medications are encouraged first, reflecting how many healthcare plans control costs while ensuring that tiered pricing incentivizes the use of generics.

The second option introduces a five-tier formulary supplemented by step therapy. This often consists of layers of medications where patients may be required to try less expensive or lower-tier medications before moving to higher-cost options, thereby managing medication costs effectively while ensuring patient safety and efficacy through a structured approach.

The third option outlines an open formulary, which typically allows broader access to medications with minimal restrictions. In an open formulary, patients might have greater freedom to choose among a wide range of prescription drugs, which can be beneficial for addressing diverse health needs.

Each of these descriptions aligns with established types of formularies used in the pharmaceutical and healthcare industries, which is why stating that all of them are types of