After months of health insurer exits from the Affordable Care Act marketplace in Arizona, state regulators have approved plans from two companies that will be the only marketplace insurance providers next year.

Blue Cross Blue Shield of Arizona will sell marketplace plans in every county except Maricopa County in 2017. The Phoenix-based insurer’s average rates will increase 51 percent, Arizona Department of Insurance filings show.

Maricopa County residents only option will be Centene Corp., which said it will sell its “Ambetter” plans. State regulators approved a 74.5 percent increase for Centene/Ambetter plans.

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The Affordable Care Act’s defenders have spent the past six years dismissing the law’s critics for predicting that it would enter a “death spiral.” But it turns out we were prophets – just look at what’s happening all across Arizona.

The past couple of months have seen the Affordable Care Act’s – Obamacare’s – online exchanges crumble in our state. Three years in, health-insurance companies have discovered that the law’s top-down, one-size-fits-all approach is a bureaucratic and financial disaster. So naturally, they’re abandoning the law in droves.

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When lawmakers and advocates were pushing to pass the Affordable Care Act, commonly referred to as Obamacare, the list of promises to the American people was long.

The law was supposed to dramatically reduce the number of uninsured, the average family was supposed to save an average of $2,500 in health-insurance premiums per year, and we were going to be able to keep our doctors and insurance plans. But the ACA has failed on these promises.

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A potential shakeup in Arizona’s Affordable Care Act marketplaces is resurrecting President Barack Obama’s 2010 health-care law as a political issue in this year’s U.S. Senate race.

The developments mean customers will have fewer subsidized plans to pick from next year, and in some rural counties, they could have no options at all. UnitedHealthcare, the national insurance giant, on Tuesday signaled that it intends to abandon Arizona’s Affordable Care Act marketplace in 2017. Blue Cross Blue Shield of Arizona, the only other insurer to offer plans in all of Arizona’s 15 counties, also is considering pulling out of some areas.

Arizona voters could face a stark choice on the issue in November.

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It’s not surprising that UnitedHealthcare is high-tailing it out of Arizona’s health-insurance marketplace. The exchanges — a major part of the Affordable Care Act — are money losers. Not enough young, healthy people have signed up in Arizona and elsewhere to use the plans. Some rural counties in Arizona may have no options on the exchange, which could complicate things for those who are required to have insurance but don’t qualify for coverage through an employer.

The exchanges have never been viable options for healthy, working people. They are not affordable for those who are in the middle class and patients have to be careful to choose a plan that offers decent doctor choices.

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A low-cost health insurance co-op that covers about one in three Arizonans that have an Affordable Care Act marketplace plan won’t be allowed to sell health plans Sunday — the opening day consumers can purchase insurance — after the state of Arizona and the federal government took action against the entity. The Arizona Department of Insurance said Friday afternoon that Meritus Health Partners/Meritus Mutual Health Partners has been placed into “supervision” and only can continue to serve existing clients until the end of the year. The federal government also suspended Meritus from the Affordable Care Act’s federal marketplace, which means the company won’t be able to sell health plans via healthcare.gov when the health-care law’s three-month enrollment period begins Sunday.