Don't forget the long running lawsuits against prescription drug plan managers [1][2][3]. You can't have a health plan without a prescription drug plan manager, and if you live in NY, CVS Caremark appears again and again on the NY State of Health website--I know, I looked, because CVS Caremark does not cover prescriptions at Walgreens near my home--Anti-competitive fracking bull $#!T.
NOTE: I don't know the sources, but the descriptions are sufficient. More research will reveal more coverage--I found SF Chronicle article, but was paywalled.