What amount difference signifies "preferred" status on the PBM's preferred list?

The choice indicating a "$15-$25" difference signifies "preferred" status on the pharmacy benefit manager's (PBM's) preferred list because this range is commonly used in the industry to create a distinct distinction between the costs of preferred medications and non-preferred options.

A differential in this amount helps incentivize patients to choose the preferred medications, which typically translates to lower out-of-pocket costs for patients and better management of overall healthcare expenses for payers. The $15-$25 range is sufficient to motivate consumers to select a preferred medication while also allowing PBMs to negotiate favorable terms with pharmaceutical manufacturers.

In many cases, the goal of establishing preferred status is to promote the use of cost-effective therapies that still meet therapeutic needs. This balance helps ensure that patients have access to necessary medications while also managing costs effectively for insurers and employers.

The other specified ranges, although they may present a difference, are generally not aligned with standard practices in the industry for establishing a preferred status, which is why they do not represent the correct answer in this context.