The Trump Administration said on Thursday night that it is pulling back advertising promoting HealthCare.gov as open enrollment draws to a close for this year.

The Health and Human Services Department said in a statement that the government has pulled back about $5million in ads as part of an effort to cut costs.

The statement said HHS has already spent more than $60million to promote sign-ups this year under former President Barack Obama's healthcare law.

Former Obama officials immediately accused the new administration of 'sabotage'.

The Health and Human Services Department said in a statement that the government has pulled back about $5million in ads as part of an effort to cut costs. Pictured, Xonjenese Jacobs, right, helps Kristen Niemi sign up for the Affordable Care Act during a healthcare expo at the University of South Florida on Tuesday in Tampa, Florida (file photo)

Calling the decision 'outrageous', former HealthCare.gov CEO Kevin Counihan said in a statement that the move could keep young, healthy people from getting into the insurance pool, thereby driving up costs.

'We know that more young people enroll during the final days of open enrollment, but they need to be reminded of the Jan. 31 deadline,' Counihan said.

A call to the HealthCare.gov national call center on Thursday night found it to be up and running.

An operator read a script saying that the transition to a new administration has not affected coverage for 2017, and people are still able to sign up.

The HHS website still linked featured a link for open enrollment and a blog promoting the law.

HealthCare.gov and its state counterparts offer subsidized private health insurance for people who don't have access to coverage on the job.

The HHS website still linked featured a link for open enrollment and a blog promoting the law. It reminds visitors that the enrollment deadline is January 31

This year the online insurance markets have been rocked by sharply higher premiums and dwindling choice of insurers, although nearly nine in ten customers receive final assistance.

President Donald Trump and leading Republicans have portrayed the markets as on the verge of collapse, and have cast their own effort to repeal and replace the Obama health overhaul as a rescue mission.

Most independent experts say the situation is not as dire, although fixes are needed to strengthen the markets.

Some 11.5million people had signed up nationwide through December 24, or about 290,000 more than at the same time during the 2016 enrollment season.

It's not clear, however, whether the Obama's administration's goal of 13.8million enrolled for 2017 will be met.

More than 20million people have gained coverage since the healthcare law passed in 2010, bringing the nation's uninsured rate to a historic low of around nine per cent.

In addition to subsidized private insurance, the law offers states an option to expand Medicaid for low-income people.