A pharmacy benefit manager will not cover a medication that is commonly used for cosmetic purposes unless the prescriber documents that the medication is medically necessary. Which of the following describes this provision?

Coinsurance refers to the percentage of costs that a patient is responsible for paying after meeting their deductible. This term does not relate to the requirement for medical necessity documentation for medication coverage, but rather to the patient's share of the cost after insurance has paid its portion.

Disease state management involves coordinated healthcare interventions aimed at managing chronic diseases and improving patient outcomes. While this concept is relevant to ensuring effective treatment for specific conditions, it does not pertain to the requirement of documenting medical necessity for cosmetic medications.

Therapeutic interchange is the practice of substituting one medication for another that is therapeutically similar, often for cost or safety reasons. This is unrelated to the prior authorization process, which focuses on the necessity of the original medication rather than substitutions based on therapeutic equivalence.