What type of insurance is needed when a third payer is necessary after two health plans have made payments?

In situations where there are multiple health plans involved in covering a patient's medical expenses, the correct term for the type of insurance needed when a third payer is necessary after two health plans have made payments is tertiary insurance. This insurance comes into play after primary and secondary insurers have processed the claims and made their respective payments.

The primary insurance is the first to cover a claim, followed by secondary insurance which may cover additional costs not fully paid by the primary plan. When there are remaining expenses - costs that are still unpaid after both the primary and secondary insurance have contributed - tertiary insurance steps in to cover these remaining amounts. Thus, in the context of layered insurance coverage, tertiary insurance is essential for ensuring comprehensive coverage when two other plans have already fulfilled their obligations.