DoOverWLS

I was in the same boat as you not long ago as many others are here. Be sure to check out the lap band to sleeve revision forum and insurance forum as both are helpful. I too had the lap band put in in 2008 (see "My Story" on my Profile Page).
I just had revision surgery eight weeks ago to the sleeve. I have Kaiser, and I didn't have to go through classes for the revision, and they covered everything. I had self-paid for the lap band, but I would have qualified through Kaiser back in 2008 if I had wanted to wait for six months while I took the classes. (Classes were once a week for six months in Los Angeles back then.) I was impatient and ended up self paying for the band.
I would make an appointment with your Primary Care Provider and ask him/her to refer you to the barriatric program. I think just having the lap band in makes you qualify for having it out at the least and having revision surgery if you want it. I wouldn't think you have to qualify again.
At the very minimum, you'll probably have to have an Upper G.I. so that they can see where the band is and what it is doing. You'll also have some blood tests, etc., prior to surgery and possibly an endoscopy.