Cost of Obamacare's insurer bailout program won't be known until summer 2015

The Congressional Budget Office essentially didn’t account for the cost of the program when it evaluated the health care law, as the number-crunchers assumed that the payments between insurers and the federal government would cancel each other out.

Following the botched rollout of the health care law, which has threatened insurers with a risk pool that skews toward older enrollees, it’s increasingly less likely that the provision will remain budget-neutral.

But Republicans are doubtful that the CBO would attempt to re-score the risk corridor program anytime soon.

“My understanding is that the first bit of data that they’d need to do that is not available,” Griffin said in a phone interview.

Insurers won’t know the final composition of the risk pool until open enrollment on the health insurance exchanges ends on March 31.