Let's see... 47 million uninsured, 12 million illegals.
Nope. Even if every illegal is uninsured, the numbers just don't support your claim, and the ones who have been here for a couple of decades just might have jobs that provide health care.
Center for Immigration Studies
34 percent of immigrants lack health insurance, compared to 13 percent of natives. Immigrants and their U.S.-born children account for 71 percent of the increase in the uninsured since 1989.
Table 11 reports the percentage of immigrants and natives who were uninsured for all of 2006. (The CPS asks about health insurance in the calendar year prior to the survey.) The table shows that lack of health insurance is a significant problem for immigrants from many different countries. Overall, 33.8 percent of the foreign-born lack insurance compared to 13 percent of natives.33 Immigrants now account for 26.8 percent of all uninsured persons in the United States. This compares to their 12.6 percent of the total population. If the young (under 18) U.S.-born children of immigrants are included with their parents, the share without health insurance is 29.9 percent. The share of children who are uninsured is lower than for their parents mainly because the U.S.-born children of immigrants are eligible for Medicaid, the health insurance program for the poor. Thus the inclusion of the U.S.-born children pulls down the rate for immigrants slightly. In total, there are 14.9 million uninsured immigrants and their young U.S.-born children in the country, accounting for 31.7 percent of all persons without health insurance. This is roughly double their share of the total population, which is 16.7 percent. Of young children (under 18) without health insurance, 38.1 percent (3.3 million) are immigrants or the young U.S.-born children of an immigrant father. Recently there has been a debate over extending SCHIP, which is a form of Medicaid, to more young children with incomes below 200 percent of poverty. Currently, 43 percent of low-income uninsured children (under 18) are immigrants or the U.S.-born children of immigrant fathers. While not generally acknowledged, immigration is at the center of the current SCHIP debate.
The low rate of insurance coverage associated with immigrants is primarily explained by their much lower levels of education. Because of the limited value of their labor in an economy that increasingly demands educated workers, many immigrants hold jobs that do not offer health insurance, and their low incomes make it very difficult for them to purchase insurance on their own. A larger uninsured population cannot help but strain the resources of those who provide services to the uninsured already here. Moreover, Americans with insurance have to pay higher premiums as healthcare providers pass along some of the costs of treating the uninsured to paying customers. Taxpayers are also affected as federal, state, and local governments struggle to provide care to the growing ranks of the uninsured. There can be no doubt that, by dramatically increasing the size of the uninsured population, our immigration policy has wide-ranging effects on the nations entire healthcare system.
One study found that after controlling for such factors as education, age, and race, uninsured immigrants impose somewhat lower costs than uninsured natives. However, when the authors simply compared uninsured immigrants to uninsured natives the cost differences were not statistically significant. In other words, when using the actual traits that immigrants have, the costs that uninsured immigrants create were the same as uninsured natives.34 Of course, even if there was a difference in the costs uninsured immigrants create when compared to uninsured native, it would have to be enormous to offset the fact that immigrants are two-and one-half times more likely to be uninsured than native-born Americans.
Immigration Accounts for Growth in Uninsured. According to the Census Bureau, since 1989 the population without health insurance has grown by 14.62 million and stood at 47 million in 2006. Much of this growth has been driven by immigration. To understand the impact of immigration, we can remove from the CPS immigrants who lack health insurance and arrived after 1989. In the March 2007 CPS there were 9.21 million immigrants who arrived in 1990 or later who did not have health insurance. This is equal to 62.9 percent of the growth in the uninsured population. Moreover, there were 1.12 million children born to post-1990 immigrants who also lacked insurance, meaning that new immigrants and their U.S.-born children accounted for 71 percent of the growth in the uninsured population.
Uninsured or on Medicaid The 2007 CPS shows that 17.7 percent of immigrants and their U.S.-born children under 18 are on Medicaid, compared to 11.9 percent of natives and their children.35 Of immigrants and their young children (under 18), 47.4 percent either have no insurance or have it provided to them through the Medicaid system compared to 25 percent for natives and their children.
Sorry not 50% when you throw in all the numbers it's around 30%, however the growth of the uninsured is caused by illegals by 71%
At that rate, 50% aint that far off