Eating Disorder clinic cost?

my daughter was recently diagnosed with anorexia. She was given a few weeks by the doctor to show signs of recovery but all she has done is lose more weight, now they say it is mandatory that she be sent to an impatient clinic if by the end of this week she has not gained atleast some weight. I want to know how much the cost would be to keep her in there for 2 weeks to a month? I am in the military if that helps, I just dont know if my insurance will cover it completely or about how much i would have to pay. If it helps, the clinic she is supposed to go to is sheppard pratt. Anyone else have the same experience? i would really appreciate quick answers. thanks