Consumers who try to sign up for insurance after the Obamacare open enrollment period will soon need to submit proof that they are eligible for most special enrollment periods, federal health officials announced Wednesday.

This new confirmation process, which is expected to start in the next few months, will only affect those living in the 38 states that use the federal Healthcare.gov site.

It addresses complaints from insurance companies that the Centers for Medicare and Medicaid Services was allowing too many people to buy insurance after the open enrollment deadline passed. This, insurers said, left them with many consumers who waited until they were sick to sign up and then dropped coverage after they received treatment. And the companies claim that created a sicker-than-expected pool of customers that was contributing to the losses on Affordable Care Act exchange plans.

Six states filed a new lawsuit Wednesday against the Obama administration over the Affordable Care Act.

The complaint that Texas, Wisconsin, Kansas, Louisiana, Indiana and Nebraska filed in the Northern District of Texas takes issue with the Health Insurance Providers Fee assessed to health insurers to cover federal subsidies.

The lawsuit says nothing in the Affordable Care Act’s language provided clear notice that states would also have to pay the fee.

“This notice was not even provided by rule but was ultimately provided by a private entity wielding legislative authority,” the suit says.

Leaders of some health cooperatives set up under the Affordable Care Act said it would be hard for the Obama administration to recoup more than $1 billion in federal loans made to some of the organizations that are now defunct, because most of the money has been spent.

A group representing existing co-ops, as well as leaders of some of the organizations, said there is little of the federal loan money remaining and some of what is left is needed to pay providers whose bills have yet to be paid. Obama administration officials have said they plan to use every available tool to recoup the federal loans, including legal action.

Thousands of doctors, hospitals and other providers in some states still haven’t been paid for health services they provided to members insured by the co-ops, which are organizations set up under the health law to offer health insurance to consumers and cut costs by giving established insurers more competition.

Health Republic Insurance Company of Oregon, a Lake Oswego-based insurer that is phasing down its operations, on Wednesday filed a $5 billion class action lawsuit on behalf of insurers it says were shorted by the federal government under an ObamaCare program.

The lawsuit, filed in the United States Court of Federal Claims, focuses on a program that was intended to offset insurer losses in the early years of the implementation of the Patient Protection and Affordable Care Act.

Instead, payments to insurers under the “risk corridor” program amounted to 12.6 percent of the amount expected for 2014, and are expected to be similarly low for 2015.

Federal law and regulations “are unequivocal about the payments the Government must make,” according to the lawsuit. “The law is clear: the Government must abide by its statutory obligations.”