Explain the difference between coinsurance and copayment.

Explain the difference between coinsurance and copayment.

• A. Coinsurance is a fixed amount paid at service; copayment is a percentage of the cost.
• B. Copayment is a fixed amount paid at service; coinsurance is a percentage of the cost after deductible.
• C. Coinsurance and copayment are both fixed amounts with no difference.
• D. Copayment applies to hospital stays; coinsurance applies to all services.

Answer: (B)

The difference rests in how you share costs with the insurer. A copayment is a fixed dollar amount you pay at the time of a service (for example, $20 for a doctor visit), and it is a set fee regardless of the total charge. Coinsurance, on the other hand, is a portion of the cost you pay after you’ve met your deductible, expressed as a percentage of the allowed amount (for example, 20% of the bill), so your payment varies with the service price. This distinction—copay as a fixed amount paid up front, versus coinsurance as a percentage of the cost after the deductible—best captures how these two cost-sharing elements function. Some plans may use both for different services, but the core idea is fixed versus proportional cost sharing after deductible.

The difference rests in how you share costs with the insurer. A copayment is a fixed dollar amount you pay at the time of a service (for example, $20 for a doctor visit), and it is a set fee regardless of the total charge. Coinsurance, on the other hand, is a portion of the cost you pay after you’ve met your deductible, expressed as a percentage of the allowed amount (for example, 20% of the bill), so your payment varies with the service price. This distinction—copay as a fixed amount paid up front, versus coinsurance as a percentage of the cost after the deductible—best captures how these two cost-sharing elements function. Some plans may use both for different services, but the core idea is fixed versus proportional cost sharing after deductible.