You can seek enforcement of the decree and yes, you can ask for attorney's fees for the privilege. Since this is technically "medical" related, you may be able to have the Judge enforce it as additional child support. That said, if the Judge does not enforce this as additional child support, you may end up with an empty judgment.
An empty judgment is a court order that he pay you but you have little or no way to make him pay. You can only hope he pays or comes into money. There are collections actions, but that is more court time, more money, etc.
Roy L. Reeves - Reeves Law Firm, P.C.
www.planoattorney.net