In 2011 we purchased my wife a Medicare Advantage Platinum dental plan. We paid the premiums on time every month. To that end… No problems. Things went abruptly south last spring when my wife lost a tooth. We referred to UHC's provider list in our town (pop. C. 500,000). Although the list was several pages, no provider would accept the plan (some were dead or retired!). After having written 2 letters to UHC & having contacted the AZ State Insurance Commission, we did receive a response from a rep named "Gwen", who said she wanted to "research the problem". Gwen actually did call my wife once/week for several weeks to report her lack of progress. Those calls ended a month ago. At this point we are considering filing suit to retrieve our premiums.