Preferred Pharmacies in Medicare Part D
Medicare Part D plans have begun using preferred pharmacy networks in order to steer their beneficiaries to lower cost pharmacies. A key question is, does this work? A paper by Xu et al. (2022) aims to answer this question using 2011-2016 data. that compares Low Income Subsidy (LIS) Medicare beneficiaries and non-LIS beneficiaries. LIS beneficiaries…