This is an interesting piece I found while surfing, from the year 2003.

http://www.parapundit.com/archives/001731.html

2003 October 23 Thursday
One Year Of Illegal Alien Health Care Costs Would Pay For Border Barrier
Non-citizens cost billions per year in uninsured health care.


Non-citizens are putting the hurt on our hospitals. A study by the Florida Hospital Association estimates that uninsured non-citizens cost the state's hospitals an average of $63,612 per patient last year.

The tab is rising as the number of immigrants continues to swell from coast to coast. The American Hospital Association reported that its member facilities provided $21 billion in uncompensated health-care services last year.

While not all those costs can be attributed to undocumented aliens, new Census data show that non-citizens are, by far, this country's largest group of uninsured residents — 43 percent of the total.

The costs of health care are just one way that low skilled low wage immigrant non-citizens cost the US economy and citizens money. Keep in mind that these figures above underestimate even the medical costs of low skilled immigrants because millions of illegals were granted citizenship thru amnesties and a large portion of them are uninsured. Also, the costs above do not include costs at government clinics and private practices or the costs of the US citizen children who are born in the United States to illegal aliens whose parents use Medicaid and other government programs to pay their health care. Even with this narrow definition on the costs of low skilled immigrants for health care the cost for less than a single year of paying the health care of non-citizens would pay for a barrier to keep illegal aliens from crossing into the United States from Mexico. Various cost estimates (see here and here and here) for the West Bank-Israel fence structure , if extrapolated to the longer US border with Mexico, suggest that the US could stop the flow of illegal aliens from Mexico for a cost of between $2 billion and $8 billion dollars. The range of cost estimates reflects the fact that the Israelis are building more and less formidable barriers in different sections depending on perceived risk. If we go for the more deluxe barrier structure for the entire border it would still cost less than a single year of uninsured and unpaid health care bills run up by non-citizens living within the US borders.