Coinsurance is a cost-sharing arrangement in health insurance where the insured pays a certain percentage of the medical expenses after meeting their deductible. For example, if your plan has a 20% coinsurance, you would pay 20% of the costs for covered services, while your insurance company would cover the remaining 80%. This means that after you have paid your deductible, you still share some of the costs of your healthcare. Coinsurance typically applies to various medical services, including hospital stays, surgeries, and outpatient care. It is important to understand your coinsurance rate, as it can significantly affect your out-of-pocket expenses. Always check your health insurance policy to know how coinsurance works and what percentage you are responsible for.