Everyone knows going without health insurance isn’t a great idea. (It’s also technically illegal, so there’s that.) So why does it have to be so insanely confusing? HMOs, PPOs, tier systems…what does this nonsense even mean? Is an insurance agent required? What’s an insurance marketplace? Do not feel bad if it seems overly complicated and confusing. We were confused too, so we put together the list below to break it down.