The family's options improved somewhat a decade ago with the expansion of community health clinics, which offered free or low-cost care with help from the federal government. But President Barack Obama's health care overhaul threatens to roll back some of those services if clinics and hospitals are overwhelmed with newly insured patients and can't afford to care for as many poor families.

To be clear, Obama's law was never intended to help Limas and an estimated 11 million illegal immigrants like her. Instead, it envisions that 32 million uninsured Americans will get access to coverage by 2019. Because that should mean fewer uninsured patients showing up at hospitals, the Obama program slashed the federal reimbursement for uncompensated care.

But in states with large illegal immigrant populations, the math may not work, especially if lawmakers don't expand Medicaid, the joint state-federal health program for the poor and disabled.