Mass Health, welfare health insurance, has extremely limited coverage for weight loss surgery. They'll make you try dieting and excercise first.
Worse, it's almost impossible to find any gastroenterologist - the kind of doctor who would do that surgery - willing to operate for what welfare health insurance pays.
Odds are, you're not going to get that surgery covered. But hey, if you only want to lose weight if someone ELSE pays for it, you don't want to lose weight very badly, do you. When you decide you want to lose weight badly enough to make some lifestyle changes, the easiest thing to do, is to stop buying and eating multi-ingredient foods. If it's got more than one ingredient . . .don't eat it.
You can certainly check coverages, but chances of lap band coverage are very slim to zero. Understand that health professionals do NOT agree to such surgery unless other attempts are made for weight loss. Lap-band is VERY expensive, and no insurer will pay such costs unless appropriate medically supervised attempts are made to accomplish weight reduction.