Nearly 16 million Americans have so far signed up for health insurance through the Affordable Care Act's marketplace, a 13% jump from a year earlier, according to the U.S. Department of Health and Human Services (HHS) on Wednesday.

Enrollment for 2023 healthcare plans under the Affordable Care Act, also known as ObamaCare, is open between Nov. 1 and Jan. 15.

About 3.1 million people who have signed up for the plans are new enrollees, HHS said.

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Emergency room sign

An emergency sign points to the entrance to Scripps Memorial Hospital in La Jolla, California, on March 23, 2017. Almost 16 million Americans have signed up for Obamacare plans for 2023. ( REUTERS/Mike Blake)

ObamaCare helps low and middle-income Americans who do not have access to affordable health insurance coverage through an employer.

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Insurers that provide these plans include UnitedHealth Group Inc, CVS Health, Centene Corp and Elevance.