Its for a school project, and I cant seem to find any info on it! Its for a school project, and I cant seem to find any info on it!

It definately depends on the area, and what type of treatment center it is. Some of them operate on a sliding scale. I would just call a few of them in your area and get an average.

I'm doing a paper and i cant find costs of inpatient treatment anywhere! does anyone know, like roughly how much a month it costs? or where i could find this info? 10pts for best answerer!

Depends on insurance. A day in a hospital at Medicaid rates might be $650,00, but a rich private pay person might pay 3x that amount. Also it can be difficult to find a hospital that treats this illness because it is a psych illness which affects your physical well being.
I would call a psych hospital and tell them you think you have an eating disorder and that you don't have any insurance and that your folks are divorced, but your dad said he would pay. He told you to get information for your next visit this weekend. I don't know if anybody will give you an exact or even an approximate amount. If they do, I also suspect that they will tell you that it is for psych only and any medical treatment will be extra. They will pressure you to come in for a free assessment, just say no I have to talk to my dad. Many hospitals hire companies to pitch their own employees to see if they answer the phones correctly. Make sure you call M-F business hours.