The Biden administration plans to push states to boost oversight of the number of doctors, hospitals, and other health providers insurers cover in Obamacare plans, under rules proposed in November.

The annual regulatory proposal, known as the payment parameters rule, also seeks to expand access to adult dental coverage in Affordable Care Act marketplaces and would require states to hold open enrollment periods for Obamacare plans at the same time of year. It's likely one of the last major ACA policy efforts of President Joe Biden's first term — and, if he loses reelection, could represent his final touches on the landmark health program created when he was vice president.

Biden has been a staunch supporter of Obamacare and has taken steps during his own first term in the White House to expand the program through rules and legislation, including measures that increased premium subsidies. In part because of those subsidies, enrollment has increased steadily and hit records under his watch.