If an insured decides to reduce the coinsurance amount on her major medical insurance, what can the insured expect?

When an insured chooses to reduce the coinsurance amount in their major medical insurance, they can expect a higher monthly premium. The rationale behind this is that coinsurance is a cost-sharing mechanism where the insured pays a certain percentage of covered healthcare expenses, while the insurer pays the rest. By lowering the coinsurance rate—meaning the insured pays a smaller percentage of the costs for covered services—the insurer bears a larger portion of those expenses.

To account for this increased risk and potential payout, insurance companies often increase premiums. This adjustment reflects the insurer's need to balance the financial implications of covering more expenses than before. Therefore, it’s reasonable for the insured to expect a higher monthly premium as a direct result of reducing the coinsurance amount.

The other options pertain to different aspects of insurance policy terms that are not directly related to the coinsurance changes; thus, they do not reflect the correct outcome of altering the coinsurance rate. For instance, while a reduction in coinsurance might seem like it could lead to a higher deductible or affect the lifetime benefits, these factors do not directly correlate in the same way that premiums do when coinsurance is altered.