In response to my Health Care Update (sign up here) on disappearing health care plans, I received a note from somebody who will lose her Medicare Advantage insurance plan on January 1, 2011. The company isn’t leaving the market entirely, but is eliminating her plan.

While Medicare Advantage customers lose their existing plans and have to settle for fewer benefits, the Kaiser Family Foundation reports there will be 30 percent fewer choices for Medicare Part D prescription drug plans and those remaining plans will have average premium increases of 10 percent.