Copay
A copay is a fixed amount ($20, for example) you pay for a covered healthcare 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 $3,000 deductible, for example, you pay the first $3,000 of covered services yourself.
Coinsurance
The percentage of costs of a covered health care service you pay (20%, for example) after you’ve paid your deductible