Co-insurance is a cost-sharing practice between the health insurance company and the policyholder. It’s calculated as a percentage of medical expenses. Once the policyholder reaches their annual deductible, they’ll start paying co-insurance. After that, the health insurer pays the remaining costs.
The insurer may apply different co-insurance percentages to each health service. So you might pay for additional doctor visits, lab work, prescription drugs, and other needs.
For example, the co-insurance for a primary care doctor in your network might be 20%, but the co-insurance for a primary care doctor outside your network might be 75%.