Depends on what your orders say - a few possibilities: 1) If it says that you two are to work together for a certain reason and you cant agree, a professional is consulted, there is the answer.
2) If its because she doesnt want to pay 1/2 of the uninsured medical expense of it, take the expense 100% on yourself and take the child during your time.
If there is nothing like any of this in your orders, you can do #2, but I am going to guess that there is a clause in your orders that you must go to mediation before filing court papers again. Try to take the other parent to mediation or simply take on 100% of the expense and take the child during your parenting time.
Dawn SW Legal Serivces, Inc. www.swlegalservices.com