![](https://petris.org/wp-content/uploads/2018/03/Screen-Shot-2018-03-29-at-9.31.54-AM-e1564772344917.png)
May 31, 2019
by Richard M. Scheffler
The purpose of this testimony is twofold. First, I will provide background information on the Medicare Part D stand-alone prescription drug plan (PDP) market and present recent market concentration trends. Second, I will demonstrate how Aetna’s proposed divestiture of its PDPs to WellCare would increase PDP market concentration.
*This paper was revised and reposted on June 17, 2019