Determine what type of Medicare coverage you have. Types of Medicare coverage include original Medicare Part A hospital insurance, Part B medical insurance, Medigap and Advantage Plans. Medigap is always secondary to the primary Medicare coverage. If you have a Medicare Advantage plan, skip to step 3.
Call 1-800-MEDICARE. Inquire about the status of your Medicare coverage and whether other primary insurance exists.
Contact the number on the back of your Medicare Advantage plan card. Inquire about whether your Advantage plan is your primary insurance coverage.