Hello Folks! I'm abenefits person for my company, a big part of my job is explaining our insurance....
The first and most important thing to realize about ANY insurance is that
EACH EMPLOYER dictates what their insurance covers.
For instance I have Blue Cross, and I had NO PROBLEM getting covered... even though BLUE CROSS IS FAMOUS FOR DENYING IT.. but that is because my EMPLOYER told them to cover it....
The best way to find out if YOUR COMPANY allows your insurance to cover it is to call the customer service number on the back of your card and see if GASTRIC BANDING (procedure code 43770) is covered. OR you can ask what OBESITY benefits if any that your policy covers.
Another way, is to go ask your Human Resources person if its covered OR ask for a copy of your Medical SPD (PLAN DOCUMENT)The plan document is most likely a book of boring stuff that you got at orientation that you never read

this is available in your HR department if your insurance is "Self Insured".
The best advice I could give anyone is to educate yourself about YOUR particular insurance, know how it works.. because the kind people who staff doctors offices won't KNOW the particulars of YOUR insurance since EACH and EVERY Employer has different requirements...........
GOOD LUCK