Here's what was faxed to me by TriWest:
TriWest will cover only ONE bariatric surgery in a lifetime, except of there is a complication from the original covered surgery (slip of a band, etc.).
Repeal/Revision of a covered bariatric surgical procedure, due to technical failure of the original procedure, is covered when ALL of the following criteria are met:
1) The patient has failed to achieve adequate weight loss, which is defined as failure to lose at least 50% of excess body weight or failure to achieve body weight to within 10% of ideal body weight, at least TWO years following the original surgery
2) the patient met ALL the screening criteria, including BMI requirements of the original procedure, AND HAS BEEN COMPLIANT WITH A PRESCRIBED NUTRITION AND EXERCISE PROGRAM FOLLOWING THE ORIGINAL SURGERY.
3) The requested procedure is a covered bariatric surgery.
Hope this helps.