A type of insurance in which the insured pays a share of the payment made against a claim.

• A. Copay
• B. Coinsurance
• C. Deductible
• D. Premium

Answer: (B)

In health insurance, coinsurance means you pay a percentage of the covered costs after you’ve met your deductible. This matches “a share of the payment made against a claim” because you’re sharing the cost with the insurer rather than paying a fixed fee or the full amount. For example, with 20% coinsurance on a covered charge, after the deductible is satisfied, you would pay 20% of the allowed amount and the insurer pays 80%, up to your out-of-pocket maximum. This differs from a copay, which is a fixed amount per visit regardless of the bill size; a deductible is the amount you must pay before the insurer starts paying; a premium is the regular payment to keep the policy active.