Falling below 40 BMI during Aetna pre-op diet

At the end of the month my surgeon will submit my WLS request to Aetna.  In the last 5 years I've had a BMI of 40 or above each year.  My concern is that my BMI was 43 when I started the pre-op diet.  Right now my BMI is around 39.5 and I don't have the co-morbidities that Aetna requires for BMI's under 40.  Will Aetna use my current weight or my starting weight for the determination? Has anyone had experience with this?  I'd like to know as much about this as possible, so the request is submitted in the best possible way. I've read and re-read Aetna's guidelines.  I meet every other guideline specified.  This is the only thing not spelled out in their policy.