People who switched to Obamacare plans from noncompliant plans, as a result of cancellation or otherwise, were split on the question of whether they now paid more or less in premiums.
Forty-six percent said they pay less in premiums for their Obamacare plans, 39 percent said their premiums had increased, while 15 percent said they paid about the same.
There was also a split among those respondents when asked about the out-of-pocket costs associated with their new plans, and the range of health-care services they received.
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Thirty-one percent said their annual deductible limits had gone down compared to their old, pre-Obamacare plans, while the same percentage said their deductibles had increased. Thirty-three percent said their deductibles stayed the same.
When asked how their new plan's range of health services compared to their old plan, 43 percent said "about the same," while 31 percent said "better" and 25 percent said "worse," according to the survey.
Kaiser noted that insurers treat enrollees in ACA-compliant plans as a single "risk pool" for the purpose of setting premiums, regardless of whether those enrollees bought plans sold on the exchanges or outside them.
The foundation's survey found that for people in ACA-compliant plans, a large majority—82 percent—said they were in excellent, very good or good health. But 13 percent reported being in "fair" health while 4 percent said they were in "poor" health.
In contrast, just 6 percent of people in noncompliant health plans reported being in fair health, and less than 1 percent said they were in poor health. The rest said they were in good or better health.
"The health status of enrollees has particular significance because it has implications for whether premiums this year will be adequate to cover the health expenses of enrollees and how much insurers may increase premiums for next year," the survey said.
While the results suggest "the people in new, ACA-compliant plans are somewhat sicker" than people in the old, noncompliant plans, "what this might means for premiums in the [individual] market is still uncertain, however, since many insurers anticipated a sicker-than-average mix of enrollees when they set their premiums for this year."
—By CNBC's Dan Mangan