$8.5 Million will be set aside to care for migrant and seasonal workers. A sizeable percentage of them may be illegal so these hospitals will not be asking for immigration status.
The Pew Hispanic Center has found that about a quarter of migrant workers are undocumented. That could be higher if you count those that have documents but illegal ones.
15.4% of all uninsured persons in the US are illegal immigrants. 7.2 Million illegals lack health insurance.