If you missed the deadline on Sunday to enroll in health insurance for the recent year through the Affordable worry Act marketplace, you now have a few more days to do so, the Centers for Medicare & Medicaid said.

People who desire ACA marketplace health insurance coverage, also known as Obamacare, to commence Jan. 1 now have until midnight local period Wednesday, Dec. 18 to enroll, a CMS spokesperson said. The original deadline was Dec. 15. Marketplace consumers who enroll after the Dec. 18 extended deadline will have coverage that starts Feb. 1.

Data display the number of recent enrollees, or consumers who don’t currently have health insurance through the ACA but are signing up for a 2025 schedule, is down 32% from this period last year, said Noah Lang, chief executive of Stride, which helps people discover health insurance. On Dec. 4, CMS said nearly 988,000 people had newly enrolled in an ACA schedule.

The enrollment extension is only the second one CMS has ever offered, he said. The first period was in 2016.

“This extra three days gives people period to shop,” he said. “Millions (of people) are still not insured or can save money.”

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Why is ACA enrollment down this year?

In early December, 55% of respondents in a Stride survey said they were concerned about how the incoming Trump administration will impact their upcoming health insurance. Worries about how their coverage may transformation or costs might rise are leading some people to not enroll in the ACA marketplace, it said.

But they shouldn’t worry, Lang said.

“schedule options and prices are locked in for 2025,” he said. “Coverage won’t transformation, and ACA credits won’t transformation.”

The additional expense responsibility financing is a refundable financing that helps eligible individuals and families cover the premiums for their ACA health insurance.

Timing may also play a role, Lang said. “It may have been the first period we had the enrollment deadline on a Sunday night,” he said. “People are spending their weekends shopping (for the holidays) and spending period with household,” not looking at health insurance.

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Will these extra days make a large difference?

Updated enrollment data won’t be available until January, but “there could be a wave of people enrolling because it’s not a weekend,” Lang said.

People also are receiving notices about their insurance premiums in the recent year correct about now, which could spur them to look for ACA plans, Lang said.

The average additional expense boost is estimated around 7%, according to a update from insurance research site ValuePenguin.com.

If people are worried about long wait times with CMS to get enrolled, he said CMS has partners like Stride that can assist. People can leave online, enter information about prescriptions, preferred doctors and health conditions and the site can discover health insurance plans that suit those needs. They can choose one and enroll on that site, he said.

Medora Lee is a money, markets and expense management reporter at USA TODAY. You can reach her at [email protected] and subscribe to our free Daily Money newsletter for expense management tips and business information every Monday through Friday morning.