Considering a second reduction 10 years later - could I be reduced from a C/D cup to a B cup and add an internal bra?

I had my first reduction just ovr10 years ago now, my surgeon took me from a G to a C cup. I’m 5ft tall and currently around 135lbs, my weight has gone up and down in the past but I want to say even at the time of the first reduction I was probably around a similar weight, maybe a 5-10 lb difference I don’t remember. Anyway, Ive been at a consistent weight for about a year now, I’ve gone back up to a D cup bra, but my left is at least a whole cup size bigger than my right, and also has a lot of sideboob that I hate. My right breast is a C cup still. Im also having some neck and shoulder pain again, which is how I was able to get my first surgery covered by insurance. Would I Be able to go through insurance again? Can I be reduced to a B cup and get an internal bra? I do not have my previous records sadly as my surgeon’s practice has been closed for some time now, would I need to find out how to obtain those?