What is the purpose of an "other insurance" clause in a health insurance policy?

• A. It increases benefits if other coverage exists.
• B. It applies only to life insurance.
• C. It eliminates all other coverage automatically.
• D. It coordinates with other coverage and prevents duplicate benefits across multiple policies.

Answer: (D)

The idea behind an other-insurance clause is coordination of benefits. When you have more than one health coverage, this clause makes the plans work together so benefits aren’t paid twice for the same charges. It sets the order of payment—which plan pays first (primary) and how the other plan contributes (secondary)—so total benefits don’t exceed the actual medical costs and aren’t duplicated across policies. For example, if the total bill is $1,000 and the primary plan covers $700, the secondary plan may cover the remaining $300 (up to its own limits and subject to deductible or coinsurance), but it won’t pay more than the bill. This ensures costs are shared fairly and avoids overinsurance. The other options don’t reflect this coordination function—they don’t increase benefits, aren’t limited to life insurance, and don’t automatically eliminate other coverage.