OP, I completely understand your frustration. Thankfully, both times a member of my family used an ambulance the insurance company decided to pay for it, however, I had no luck getting them to pay for fetal non-stress tests (done twice a week for 8 weeks) because they had nothing to do with a baby

I told them the fetal part should have given them a clue, but still, no dice. I was too sick to fight at the time, however, I pay an arm and a leg for ours (over $500 per month, and that is only 25% of the policy) and I expect things to be paid for. Good Luck.