President Barack Obama’s executive order to spare some immigrants from deportation has galvanized Democrats, immigration groups and health care advocates in California to push for expanding health coverage to a segment of the population that remains uninsured.

The president’s action excludes immigrants who came to the country illegally from qualifying for federal health benefits. But California has its own policy of providing health coverage with state money to low-income immigrants with so-called “deferred action” that allow them to avoid deportation. Immigrant and health care advocates say that means Obama’s executive order will enable hundreds of thousands of low-income immigrants in California to apply for Medi-Cal, California’s version of Medicaid.

Anthony Wright, executive director of Health Access California, said allowing this expanded group of immigrants to participate in the Medicaid program will enable people to get primary and preventive care, “rather than just at the emergency room.”

The California Department of Health Care Services, however, has yet to receive formal guidance. A state official said it’s too early to tell how the immigration program will impact the overall Medi-Cal program, which is consuming an increasing share of state funds.

Medi-Cal is a health program for the poor paid for by the federal government and the state. It has grown by about 3 million people in California under federal health care reform and now covers more than 11 million Californians, about 30 percent of the state’s population. The federal government is paying for the expansion, but the state will eventually pay 10 percent of additional costs to cover low-income adults, many of whom are childless.

The state is expected to spend more than $17 billion of its own money on the program this year, up 3.5 percent a year ago, according to the Legislative Analyst’s Office.

“We are assessing what some of the potential impacts could be, but it would be premature for us to comment until we have more specific information available,” said Norman Williams, a spokesman for the Department of Health Care Services.

The president’s action has also emboldened a Democratic lawmaker to revive a bill that would provide health coverage to all Californians, regardless of their immigration status.

Sen. Ricardo Lara, D-Bell Gardens, plans to reintroduce his Health4All bill on Monday to open Medi-Cal to immigrants, as well as extending subsidized health benefits in a new insurance marketplace for those without legal status. The proposal, which previously carried a cost as high as $1.3 billion a year, stalled in a legislative committee last cycle and Republicans had criticized the cost of the expansion.

“The president’s action covers almost half of California’s undocumented population, but that still leaves over a million people with no access to health care. We can do better. The bill will cover those remaining uninsured that will not benefit from Obama’s action,” Lara said.

According to the Center for American Progress, a progressive think tank in Washington, D.C., the president’s action lifts the threat of deportation to as many as 1.2 million immigrants living illegally in California. There are an estimated 2.6 million people living illegally in the state.

The issue of benefits for immigrants who are illegally in the United States is a sensitive one.