ICE will use Medicaid data to "receive identity and location information on aliens," an agreement with the Health Department said.

The Orange County HCA urged patients not to disenroll from Medi-Cal and said data previously submitted to state or federal systems would not be erased.

The personal health information of 79 million people will soon be in the hands of Immigration and Customs Enforcement officials, who will use the data trove to track down immigrants in the United States illegally.