Colorado recognizes the duty of parents to support their children, and that duty normally extends to necessary medical care. If the hospital ends up suing for the unpaid bill, it is possible to try to convince the court that the care was not reasonably necessary, but I doubt that the bill is so large that it would be worth that effort.

Usually a child support order will describe how the uninsured portion of medical bills are to be paid by the parents. If that is the case, the order should be followed, and either parent may seek relief through the custody court.