Final answer:
The secondary payer or secondary insurance pays for a claim after the primary insurance has provided its benefits, with coinsurance being a related concept where costs are split between the policyholder and the insurer.
Step-by-step explanation:
The insurance plan that pays after the primary payer has provided benefits for a claim is known as the secondary payer or secondary insurance. In situations where a person is covered by more than one health insurance plan, the primary insurance typically covers the claim first, and any remaining amount may then be covered by the secondary insurance, up to the limits of the policy. This process is particularly important in the context of coinsurance, where an insurance policyholder pays a percentage of a loss, and the insurance company pays the remaining cost.