Susan, please. If you have medical expenses that will MATTER, honestly the money wont be your biggest worry. Are you REALLY going to gripe if you have to pay $50 and he has to pay $50 on a bill since the CO states that is so, when if going by the state statute, you would pay $30 and he would pay $70? are you really going to gripe about $20? Okay, maybe you would, but a normal person would not. Your court order says 50/50, so just deal with it. Don't make everyone else's life miserable JUST BECAUSE YOU CAN by trying to modify the CO. Like I said, if you end up with a $40,000 medical bill, the money will be the least of your worries with a child sick enough to rack up bills like that.
Eternity is too long to be wrong.