Why do some seniors choose Medigap over Medicare Advantage?

Medigap offers the type of flexibility that some seniors may find is worth the higher price tag. Designer491/Getty Images

As Medicare open enrollment kicks into high gear, millions of older adults are taking a fresh look at their health insurance options. For many, that means deciding between sticking with or switching to either a Medicare Advantage plan or a Medicare supplemental insurance policy, also known as Medigap. It's a choice that can shape not just monthly budgets but also how easily seniors can access the care they need.

At first glance, Medicare Advantage plans may seem like the obvious choice. Many offer low or $0 monthly premiums and bundle extra perks like dental, vision and hearing coverage. For retirees living on fixed incomes, those features can be appealing.