Can debt for a child taken to a Dr by one parent be placed in collections for the other parent?

by David E
(Sweetwater, TN)

I was in the military stationed at Fort Hood, TX, and my spouse was in MT at the time. She took our children to an eye clinic and filed the information with TriCare. For some reason TriCare denied the claim, but they did not notify me of this. Eventually, because I had no idea I owed anything, the bill went to a collection agency and I was told that even though my wife signed them into the doctor, I was still responsible for the debt. Is there anything that I can do about this?