Because my doctor said so, that's why!

My insurance pays for 90% of my insulin pump AND continuous glucose monitoring supplies, which is incredible.  They pay for most of the medical supplies that I need, in fact.  But recently, when my doctor prescribed enough test strips to test 10-15 times per day (because that's how many I need to test to maintain tight control), my insurance decided that I only need to test at most 8 times per day.  What?!  The insurance company gets to decide what's best for my daily medical treatment, not my doctor?  I wasn't prepared to have a war with my insurance company, and I hope I don't have to.  I may be switching insurance companies soon, but even if I don't do that, I hope a letter from my doctor outlining why it is medically necessary for a diabetic patient to test her bloodsugar 10-15 times per day to achieve optimal (or at least darn good) control will suffice.  Let's hope.  Geez.