This sounds like something you father will have to take up with the Ins co.
I have never heard of an ins co not adding a newborn to the policy at birth, my children were.
Have your father call the ins co and see if they can get this taken care of, it is possible that the chrage codes are 1 number off and the ins co doesn't recognize the code.
I am assuming here, that the Joint party is your father, have him check his CR to see if it is reporting for him as well.
There are certian laws that pertain to medical collections called HIPPA, do a search for that and it should bring you a wealth on ifnormation.