The percentage of costs of a covered health care service you pay (20%, for example) after you've paid your deductible. Let's say your health insurance plan's allowed amount for an office visit is $100 and your coinsurance is 20%. If you've paid your deductible: You pay 20% of $100, or $20.

Is it better to have a copay or coinsurance?

Co-Pays are going to be a fixed dollar amount that is almost always less expensive than the percentage amount you would pay. A plan with Co-Pays is better than a plan with Co-Insurances.

What does 80% coinsurance mean?

Under the terms of an 80/20 coinsurance plan, the insured is responsible for 20% of medical costs, while the insurer pays the remaining 80%. ... Also, most health insurance policies include an out-of-pocket maximum that limits the total amount the insured pays for care in a given period.