[zrail]

It's called "out of pocket limit". After you meet your deductible the insurance company will pay for every covered cost except for the copay and coinsurance. Once you've met your out of pocket max they will pay for every dollar of every covered cost.

[Tenhundfeld]

Except prescription drugs. I am not fully informed on how the ACA affected this, but it used to be that insurance plans could exclude certain classes of prescription drugs from out of pocket max.

This is how many people are financially ruined by long-term chronic illnesses. For some less common diseases, medications can easily cost >$10,000 per month – which might not be covered by your health insurance for various reasons or only partially covered. Read the fine print.