Coinsurance

Coinsurance is how much you owe for a covered health care service or prescription, calculated as a percentage (e.g. 15%) of the allowed amount. Unlike copayments (opens in new tab), which are a flat fee, coinsurance varies based on the cost of the total service or order.

Here’s an example to clarify. Let’s say you make a visit to see a specialist (opens in new tab) for chronic migraines. Your insurance plan says the allowed amount for your visit is $100, and your coinsurance is 20%. So you’d pay $20 for your visit, and your insurer would pay the remaining $80.