Losing before surgery
Some insurance companies now require people to lose between 5% and 10% of their body weight before the will approve surgery. These companies that do have this requirement, use the starting weight to determine eligibility though.
Even if your insurance company does not require any weight loss prior to surgery, most surgeons will tell you that anything you can lose will improve the ability to complete the surgery laproscopically. It will shrink the liver making it easier for the surgeon to move it out of the work field and see what he is doing.
Even if you aren't required to lose anything prior to surgery, you do want to avoid "last meal syndrome" which can lead to weight gain prior to surgery.
I have BCBS and they are requiring me to lose 10% of my weight. I also have to document my weight loss each month at a doctor's visit.
Not all insurances require this.
As far as losing any and not being approved that might apply to people who are considered "lightweights" and whose insurance doesn't require any pre-op weight loss.
If you are pre-op you may want to call your insurance company and find out all the guidelines.
Best wishes!
Melissa