Those with incomes under $29,700 for a single person are eligible.
The cost-sharing subsidies amount to about $7 billion this year.
Here's how Obamacare figures into the government spending battle.
The White House and Democrats each have adopted hard-line positions on Trump's $1 billion request for a down payment on construction of the border wall, a central plank of last year's campaign.
But the House is facing a more pressing deadline.
The text is expected to allow states to waive out of a number of Obamacare's Title I regulations, which conservatives argue is the only way to bring premiums down in a meaningful way, while ensuring those with preexisting conditions remain covered.
The money is under a legal cloud because of a federal judge's ruling in a lawsuit by House Republicans against the Obama administration. But, the ACA also calls for tax credits that are tied to the cost of health care premiums, and they are also linked to a household's income. Kaiser says premiums would go up more in the 19 states that have declined to expand Medicaid because the CSRs help individuals in those states who earn between $11,880 and $16,400. But overall, Kaiser projects that silver plan premiums would increase about 23%, to an average of $532 a month. Since more than 80% of ACA customers pay a percentage of their income for premiums, the federal government would be on the hook for almost all of that increase. If insurers decide the government is too erratic to partner with, and many states have no sellers, the price tag would drop. Study co-author Gary Claxton said more people could enroll because more people could get a bronze plan for free, or all the news coverage about making Obamacare less generous could drive people away. The moderate said his objections included changes to Obama's law that would still leave people with excessive out-of-pocket costs.
Mr. Trump has threatened to deny payments to health insurers under Obamacare, and Democrats have insisted they must be included in the spending legislation. CEO Michael Neidorff said the company "believe (s) there is bipartisan support for cost-sharing reductions".
Any vote on healthcare legislation would be determined by Republican congressional leaders and when they have enough votes to pass a plan, White House spokesman Sean Spicer told reporters at a daily news briefing after U.S. President Donald Trump last week said he was in no rush for a vote.
On the conference call, Ryan said the House Appropriations Committee has been working closely with the White House, "so wherever we land will be a product the president can and will support". "In this climate we would anticipate anything". "We don't like those very much, but we have offered to open the discussions to give the Democrats something they want in order to get something we want".