Every time I see one of my surgery bills, I notice that the insurance company just appears to pay it, regardless of some of the craziness that is itemized. Ken Norton writes about his travels through a 50+ page EOB and the mystery of $8 chapstick.
I have found it helpful to do the stretching exercises my physical therapist recommends. Do some core strengthening exercises, such as the ones highlighted at The Mayo Clinic. By keeping your core strong, your back won't put itself in a position to cause that sciatica pain you are having.