The Healthcare.gov website is seen on a computer screen Wednesday, Oct. 18, 2017, in Washington. The Trump administration says consumers can start previewing plans and premiums online for health insurance under the Affordable Care Act in 2018. Open enrollment starts Nov. 1. (AP Photo/Alex Brandon)
The Healthcare.gov website is seen on a computer screen Wednesday, Oct. 18, 2017, in Washington. The Trump administration says consumers can start previewing plans and premiums online for health insurance under the Affordable Care Act in 2018. Open enrollment starts Nov. 1. (AP Photo/Alex Brandon) Credit: Alex Brandon

Washington — Premiums for the most popular “Obamacare” plans are going up an average of 34 percent, according to a study Wednesday that confirms dire predictions about the impact of political turmoil on consumers.

Window-shopping on HealthCare.gov went live on Wednesday, so across the country consumers going online can see the consequences themselves ahead of the Nov. 1 start of sign-up season for 2018.

The consulting firm Avalere Health crunched newly released government data and found that the Trump administration’s actions are contributing to the price hikes by adding instability to the underlying problems of the health law’s marketplaces.

President Donald Trump puts the blame squarely on “Obamacare” saying the program is imploding, while ignoring warnings that his administration’s actions could make things worse.

The Avalere analysis is for the 39 states using HealthCare.gov. Along with the increase for silver plans, premiums also are going up by double digits for different levels of coverage, including bronze (18 percent), gold (16 percent) and platinum (24 percent).

Many states had higher increases. Avalere found that average plan silver premiums will go up by 49 percent in Florida, 43 percent in Missouri and 65 percent in Wyoming.

Consumers eligible for income-based tax credits will be protected from rising premiums but those who pay full-cost face a second consecutive year of sharp premium increases.

Only three states will see declines — Alaska, Arizona and North Dakota.

Avalere said market instability is driven by Trump’s recent decision to end subsidy payments to insurers, the continued debate over “Obamacare” repeal and replace, and a presidential executive order that could open a path for lower cost plans outside of the Obama-era law.

“You put all that together, and there are a lot of additional forces on top of market forces driving high premium increases for 2018,” said Chris Sloan, a senior manager with the health industry consulting firm.

Significant increases also are expected in states that run their own health insurance websites.

Starting Nov. 1, new customers can submit applications, and returning ones can make changes to their coverage. Open enrollment will end early, on Dec. 15, about half the time allotted under Barack Obama’s administration.