Nearly 15 million Americans who are currently uninsured are eligible for coverage on the Affordable Care Act marketplaces, and more than half of them would qualify for subsidies, according to a new Kaiser Family Foundation brief.

Why it matters: President Biden is expected to announce today that he'll be reopening the marketplaces for a special enrollment period, but getting a significant number of people to sign up for coverage will likely require targeted outreach.

Details: Of the 15 million people eligible for ACA coverage, 4 million are eligible for a free high-deductible plan, 4.9 million would qualify for a subsidized plan and 6 million wouldn't qualify for any subsidy.

Between the lines: The uninsured who are eligible for ACA coverage with subsidies are disproportionately young adults, Hispanic, and working in the arts, entertainment, recreation, or construction industries.

• They're also more likely to have a high school diploma or less.