What does maximum out of pocket expense for health insurance mean?

My health insurance is that I pay 40% and the out of pocket maximum says $5,000.00 So if the hospital bill is $400,000.00 do I have to pay 40% of that, or do I only pay $5,000.00
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once you have paid out of pocket the $5,000 that is all you will pay and health care will cover the rest... at least that's how mine is.
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