PHOENIX (AZFamily) — Arizona residents who purchase health insurance through the Affordable Care Act marketplace could see an increase in premiums as high as 55%.

This comes as enhanced premium tax credits are set to expire next year, unless Congress decides to extend the subsidies.

For residents like 24-year-old Ashton Young, an increase like this could be devastating. “Such a jarring, sudden change with only a maximum of two months’ warning, it’s hard to imagine,” she said.

A few years ago, Young said she was diagnosed with a rare and aggressive form of asthma. Her treatment requires monthly injections, doctor visits and medicine, all of which she said cost about $8,000 a month.

Last year, she was able to apply for a plan through the Affordable Care Act marketplace, scoring one fo

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