“A new analysis from Avalere finds that a majority of prescription drugs covered by standalone Medicare Part D plans (PDPs) are subject to coinsurance, rather than copayments, in 2016. Coinsurance is when a beneficiary pays a percentage of the cost of the drug, rather than a fixed dollar amount, or copayment. Coinsurance often leads to patients paying more out of pocket compared to fixed dollar amount copayments. The average percentage of covered drugs facing coinsurance has risen sharply from 35 percent in 2014 to 58 percent in 2016 among PDPs. While most PDPs have historically applied coinsurance to high-cost drugs on the specialty tier, plans have extended coinsurance to drugs on lower tiers in recent years, including those covered on preferred and non-preferred brand tiers. Avalere notes that the increase in the use of coinsurance could have far reaching effects, considering 24.6 million Medicare beneficiaries enrolled in PDPs in 2016.”