Medigap, or Medicare Supplement Insurance, helps cover the gaps left by Original Medicare.
How it works
Medigap policies are standardized by letter (like Plan G or Plan N), so the same lettered plan offers the same core benefits everywhere.
When to enroll
Your best window is the six-month Medigap Open Enrollment Period starting when you turn 65 and enroll in Part B.
Medigap does not work alongside Medicare Advantage; it is generally an either/or decision.