Anybody have Medicare Advantage?

[No Vested Interest]

4. I have Humana Advantage through my state retirement plan.

I was simply switched to it a few yrs ago by the retirement system.
As others have noted, the medical office or hospital I have visited sends the plan directly to Humana Advantage, which apparently has an agreement with Medicare.
I don't have co-pays when I first go to the medical office, but will sometimes have what I consider to be a small payment after Humana Advantage has paid its part. I'm saying something like $8, or $20 if it's a larger bill.
I've been very pleased with the Humana Advantage.
It seems I can choose my own physician, for I've never had a problem with that.
Prescriptions, in my state retirement's case, are handled by another company, Express Scripts, which charges ca $4 for generics. I have only one branded prescription, which costs about $74/month.
I've been very happy with Humana Advantage, though I have read that it may not be available next year (2015), under the ACA.
I can't verify that.