There is a wide variation in the proposed prices of lower-cost so-called silver plans that were analyzed by the Kaiser Family Foundation, which also found that half of the markets it looked at would see a slight drop in the number of insurers selling plans.
The price changes range from a high of an 18 percent premium increase proposed for the second-lowest-cost silver plan in Portland, Oregon, to a low of a 13 percent price cut for such a plan in Providence, Rhode Island.
But in most of those areas, the proposed prices for the two lowest-cost silver plans would increase by a steeper rate than Obamacare plans have risen in past years — with double-digit hikes being common, Kaiser's report said.
Last year, premiums for the second-lowest cost silver plans actually grew by an average of 5 percent in the same cities, after the proposed price increases were reviewed and adjusted in some cases by state insurance regulators, according to the analysis.
In contrast, prices for the lowest-cost silver plans in the cities are proposed to increase by an average of 11 percent next year. And insurers want the second-lowest cost silver plans in those cities to increase by an average of 10 percent, Kaiser found.
Almost 70 percent of people who buy plans on the government exchanges opt for a silver plan. Such plans cover, on average, 70 percent of their customers' medical costs, with customers owing the rest out of pocket. Silver plans are also the only type of Obamacare plans that give lower-income customers subsidies to lower their out-of-pocket health costs.
"Last year, HealthCare.gov premiums increased an average of just $4 per month after shopping and tax credits, and consumers will benefit from shopping and tax credits again this year," according to Benjamin Wakana, spokesman for the U.S. Department of Health and Human Services, which oversees Obamacare.
"This is just the beginning of the rates process, and despite headlines suggesting double digit increases, proposed rates aren't what most consumers actually pay because the vast majority of consumers qualify for tax credits that reduce the cost of coverage below the sticker price, and people can shop around and find coverage that fits their needs and budget," he said.