Emergency Medical Treatment and Active Labor Act (read this Romney, you might get a clue)
http://en.wikipedia.org/wiki/Emergency_Medical_Treatment_and_Active_Labor_Act
The Emergency Medical Treatment and Active Labor Act (EMTALA)[1] is a U.S. Act of Congress passed in 1986 as part of the Consolidated Omnibus Budget Reconciliation Act (COBRA). It requires hospitals to provide care to anyone needing emergency healthcare treatment regardless of citizenship, legal status or ability to pay. There are no reimbursement provisions. Participating hospitals may only transfer or discharge patients needing emergency treatment under their own informed consent, after stabilization, or when their condition requires transfer to a hospital better equipped to administer the treatment.[1]
http://www.gpo.gov/fdsys/search/pagedetails.action?st=citation%3A42+USC+1395dd&granuleId=USCODE-2010-title42-chap7-subchapXVIII-partE-sec1395dd&packageId=USCODE-2010-title42&bread=true