Here are some helpful terms to know:
Coinsurance - The percentage of costs of a covered health care service you pay (20%, for example) after you've paid your deductible.
Copayment - A fixed amount ($20, for example) you pay for a covered health care service after you've paid your deductible
Deductible - The amount you pay for covered health care services before your insurance plan starts to pay. With a $2,000 deductible, for example, you pay the first $2,000 of covered services yourself.