Cost-sharing describes health care costs that are shared between you and your insurer.
If a service has an out-of-pocket cost to you, such as coinsurance or copay, then you’ll pay the amount determined by your plan and your insurer will cover the rest of your cost (thus sharing the cost with the insurer).
The term is generally used to refer to your share of the out-of-pocket costs. So for example, if a service’s cost-sharing on a plan might be 40% coinsurance or $10 copay, meaning you pay 40% of the costs or $10 when you access the service.
NOTE: Some cost-sharing amounts only apply before you meet your deductible, and in most cases, there is no cost-sharing for in-network services after you meet your maximum.