Jianhui Xu
Doctoral Student, USC Price School of Public PolicyResearch Assistant, USC Schaeffer Center
Preferred pharmacy networks caused a moderate shift on average towards preferred pharmacies among unsubsidized beneficiaries, although stronger financial incentives correlated with more switching.
More than one million Part D enrollees who were not eligible for cost assistance reached the catastrophic coverage in 2015.
For high-cost specialty drug users, lack of an out-of-pocket cap in Part D has eaten savings from donut hole closure.