Blue Cross covered my arm lift 5 years ago. I was getting rashes and sores due to the excess skin rubbing. I was also getting yeast infections in my arm pits. I took pictures of every rash/sore and sent in letters from my pcp, wls and ps.
I remember one person a long time ago that did she somehow proved that the lose skin flopping around was affecting her balance. But it was when I first found this board and haven't heard of anyone since.