The agency is taking another look at its baseline for determining insurance coverage losses due to the mandate repeal and expects to release new numbers this year.
Insurers not only have to figure out how to handle the loss of the individual mandate, but also new regulations aimed at expanding cheaper plans sold off the individual market, which includes Obamacare's exchanges and is used by people who don't have insurance through a job or the government.
Obamacare requires plans sold on the individual market to cover 10 essential health benefits, including maternity care and hospitalization.
Now an association plan can charge a senior five times the amount, leading to lower premiums for younger people but higher premiums for seniors below the 65-year-old eligibility for Medicare.
Insurers already sell short-term plans, making a turnaround much faster than for association health plans, said Karen Pollitz, senior fellow at the Kaiser Family Foundation.