When I was IP the social worker assigned to me only handled things like living arrangements and health insurance issues. At the time I was on the verge of homelessness and uninsured. I don't know what strings she pulled but I have never received a bill from the hospital. I vaguely remember being told about a charity program for low income patients that basically absolved them of paying for their stay. Needless to say I benefited greatly because I spent a full week IP. I'd hate to see the bill for that.