August 3, 2025
Billing & Claims

Coinsurance

What Is Coinsurance?

Coinsurance is your share of the costs of a covered health care service, calculated as a percentage (for example, 20%) of the allowed amount for the service. You pay coinsurance after you've met your deductible.

How It Works

  • If your plan's allowed amount for an office visit is $100 and your coinsurance is 20%, you pay $20. Your health insurance pays the rest ($80).
  • This is different from a copayment, which is a fixed amount.

How Mira Mace Can Help

We can review your Explanation of Benefits (EOB) to ensure your coinsurance is being calculated correctly and help you dispute any billing errors.