Administration officials said Wednesday the short-term plans will last up to 12 months and can be renewed for up to 36 months.
Short-term insurance policies go further than the association health plans in the ways they are exempt from parts of the 2010 health-care law that are meant to protect consumers from shoddy insurance that disadvantages consumers who need it most.
"These new short-term plans are nothing short of junk insurance and are so unsafe for Americans that it's no wonder not a single group representing patients, physicians, nurses or hospitals has voiced support", Schumer said in a statement.
The Trump administration's recent freeze of payments to insurers with sicker customers is another swipe at Obamacare.
"To restore these to 364 days - as originally drafted - is exactly what we are looking for", said Jan Dubauskas, general counsel for the IHC Group, speaking before the final rule was released.
Schumer said Democrats will introduce a resolution to rescind the rule using the Congressional Review Act, which allows Congress to revoke an administration regulation with a simple majority any time up to 60 legislative days after it is published in the Federal Register.
In an April analysis, the Kaiser Family Foundation found that the short-term plans sold by two online private insurance marketplaces, eHealth and Agile Health, often charge one-fifth the premiums for the lowest-run ACA health plans. They can include dollar limits on coverage and there's no guarantee of renewal.
Short-term insurance has fewer benefits.
The plans do not have to meet Obamacare's baseline coverage minimums, so things like prescription drugs or maternity care may not be covered under these plans. "These plans aren't for everyone, but they can provide a much more affordable option for millions of the forgotten men and women left out by the current system". A short-term plan might cost $160 a month or even less.
The Trump administration estimates that 200,000 Obamacare enrollees will move to short-term plans next year.
The suit claims the administration's undermining of the ACA violates the Take Care Clause and the Administrative Procedure Act, and should be declared unlawful and stopped. They are working to raise prices and reduce choices for Americans seeking insurance in the Act's exchanges.
It also noted that the administration previous year said it would halt so-called cost-sharing payments, which offset some out-of-pocket healthcare costs for low-income patients.
During the Obama administration, health officials became concerned that, as premiums for ACA health plans were becoming more expensive, some people were starting to rely on these alternatives as an end-run around the comprehensive coverage the law was created to promote.
But that won't matter starting in January, when the penalty will disappear as a result of a tax overhaul that the Republican-led Congress adopted late a year ago. These plans won't have to cover as many medical services and are exempt from covering people with pre-existing conditions.
The administration expects premiums for Obamacare plans to increase by 1% next year and by 5% in 2021 because of the shifts. "There are very important benefits that are included in the ACA and are not in short-term" plans.
Justine Handelman, senior vice president for policy and representation at the Blue Cross Blue Shield Association (BCBSA), issued a separate statement prior to the rule's finalization saying it has the "potential to harm consumers" who do not have adequate information about the short-term plans.
People who don't get insurance through their jobs will now be able to buy short-term policies that may be cheaper than Affordable Care Act coverage. The Administration predicts some 600,000 people will sign up next year, roughly 100,000 of whom were previously uninsured. What if they had the constant worry of how to pay for their insurance? Insurers will soon be allowed to sell these policies for just under a year. The plans have limits on coverage. Under the Affordable Care Act, insurance companies are required to spend 80 to 85 percent of their premiums on health care or refund money to their customers.
Both supporters and critics of short-term plans say consumers who do develop health problems while enrolled could, in theory, hang on until the next open-enrollment period and buy an ACA plan during the sign-up period because the ACA bars insurers from rejecting people with preexisting conditions.