You have an insurance plan that has a:
$5,000 deductible
20% coinsurance
Out-of-pocket maximum of $6,000
This means:
You must pay the first $5,000 of your medical costs.
After that, your plan covers 80% of the costs, and you pay the other 20%.
When the amount of coinsurance you've paid reaches $6,000, the plan covers 100% until your "plan year" renews. A plan is good for 1 year.
At the start of each year, your deductible and coinsurance resets for the next plan year and the $5,000 deductible and 20% coinsurance will start again.