The Medicare Part D base beneficiary premium for 2018 dipped slightly for the first time in five years, and CMS told Inside Health Policy the base beneficiary premium is declining because rebates and other price concessions are projected to grow faster than drug costs. The Medicare Part D base beneficiary premium -- which experts said doesn't necessarily relate to what beneficiaries may end up paying for any particular plan -- has gone up each year between 2012 to 2017, rising...