From the New York Times:
Under some plans being considered by Congress, more than one million legal permanent residents and about seven million illegal immigrants who currently have no health insurance would be excluded from coverage, according to a study by the Migration Policy Institute, a nonpartisan research group in Washington.
Under all plans under consideration, immigrants who are excluded from new programs, including illegal immigrants, would still be required to buy health insurance.
and it goes without saying that:
Democrats broadly agree that illegal immigrants should be excluded [from participation in government health care programs]