Medicare as Secondary Payer: The patient has Medicare and an employer-sponsored retirement plan, and the patient is a dependent on the spouse's employer-sponsored large group plan. The claim is for an injury received in a car accident. Billing order:

Example of how to answer question: Patient is retired and covered by Medicare, an employer-sponsored retirement plan, and his spouse’s employer-sponsored large group plan.
Billing Order: Employer-sponsored large group plan, Medicare, employer-sponsored retirement plan