Hospitals and other health care providers can now get reimbursed by the federal government for unreimbursed emergency care to illegal aliens. Up to $250 million per year will be available for four years. Details in the AP's "Government to reimburse hospitals for emergency care for illegal aliens". (Same AP report here. A more detailed AZ-specific report in "Feds to pay for treating ailing illegal immigrants".)

The only problem is that this might not be enough to cover all the costs associated with such unreimbursed care. For instance, Arizona will get $45 million/year under this plan. However:

Arizona hospitals spend $150 million annually to provide care to illegal aliens, according to the Arizona Hospital and Healthcare Association

Could they by overstating matters? Perhaps. But, by over $100 million? And:

Although a national total of annual unreimbursed medical expenses for illegal aliens is not available, it is clear that those costs are more than one billion dollars, given estimates for Texas ($393 million), Los Angeles ($350 million), Florida ($40 million), and U.S.-Mexico border counties ($300 million).

And, from thousands of miles away from the Southwest:

New Jersey's escalating population of illegal immigrants is placing an ever-growing burden on the state's hospitals, which expect to lose $200 million this year on care to the underground community.

More here, here, here, and here.

UPDATE: The NYT's "U.S. to pay for illegals' emergency care" crunches the numbers:

...even if the entire nearly $71 million allocated for California were reimbursed only to San Diego County health providers taking care of undocumented patients, the amount would fall $29 million short of covering the basic cost of that care...

...a spokeswoman for the California Hospital Association... said California hospitals provided $500 million a year in emergency care for illegal immigrants, seven times the amount of the federal grant...