Eager to maximize coverage under the Affordable Care Act, the Obama administration has allowed large numbers of people to sign up for insurance after the deadlines in the last two years, destabilizing insurance markets and driving up premiums, health insurance companies say.

More than 11.3 million people have signed up for health coverage under the Affordable Care Act in all 50 states and the District of Columbia, according to data released Thursday that provides the first national snapshot of enrollment for 2016.

The Obama administration so far is making little progress in getting more young adults to sign up for health policies on the federal insurance exchange, according to figures released Thursday.

ObamaCare has not caused employers to shift workers into part-time work, according to a new study.

More than 238,000 Californians have joined Covered California’s health insurance exchange as of Jan. 2.

With years of budget woes fading in the rearview mirror, Gov. Jerry Brown on Thursday unveiled the first draft of the state's next budget -- which includes a proposal for a new tax on health care plans that would prevent a $1.1 billion cutoff of federal funds.