Medicare and LapBand

Does anyone have any experience with Medicare covering fills for the lapband?  I am eligible for Medicare next month when I turn 65 and had lapband surgery in August 2009, and have been maintaining my goal weight since March 2010, with only 1 small unfill since then.  But I haven't been able to find out definitely whether Medicare will cover fills/unfills if I need them.  The doctor's office says no, but they have been wrong before.   I could call Medicare, but don't have the time to spend 2 hours on hold, eventually getting someone who doesn't even know what a lapband is!  Appreciate any help. 

Phyllis