Obamacare Enrollment in Private Coverage Rises to 4.2 Million

The Obama administration on Tuesday said the number of people enrolled in private health insurance under Obamacare reached 4.2 million on March 1, amid independent reports of a sustained decline in America's huge uninsured population.

The data, which reflects enrollment activity from Oct. 1 through March 1, represented a rise of about 940,000 enrollees in state and federal health insurance marketplaces during the month of February, a sign of continuing momentum. Eighty-three percent of enrollees are eligible for federal subsidies to help pay the cost of coverage.

The number of young adults aged 18-34 signing up for coverage - a key metric of success for President Barack Obama's healthcare reform law - remained unchanged at 25 percent of total enrollees.