Gary Cohen, the top health insurance regulator accused by congressional Republicans of misleading them before the troubled start of the Obamacare insurance website, will resign.

Americans with health coverage that pre-dates Obamacare can stay on their plans for two more years.

Carriers such as WellPoint and Humana stand to gain $5.5 billion next year to cover losses from Obamacare in a program the laws opponents label a bailout.

Facing an end-of-the-month deadline, the U.S. government is increasing efforts to enroll millions more Americans into Obamacare, including appeals from President Barack Obama and his wife, Michelle.

Health insurers participating in the Medicare Advantage program for elderly Americans, including Humana Inc. and UnitedHealth Group Inc., face a base payment cut of about 3.55 percent next year.

Obamacare health plans enrolled 3.3 million people through January, with young adult participants increasing 65 percent from a month earlier, the U.S. government said.

President Barack Obama said a delay until 2016 in his health care mandate for mid-sized employers is an adjustment that doesnt undermine the law.

Employers with fewer than 100 workers wont have to provide health insurance until 2016 under Obamacare, as the administration said it would again delay a key requirement of the health law.