How Medigap fills the gaps

How Do Medicare Supplement Plans Work?

A Medicare Supplement, often called Medigap, sits alongside Original Medicare and pays many of the costs Medicare leaves behind. Here is how the plans are structured, what each letter covers, and when to buy one.

How Do Medicare Supplement Plans Work?

The basic mechanic is simple. When you have Original Medicare and a supplement, Medicare pays first and the supplement pays second, picking up many of the deductibles, coinsurance and copays that Medicare leaves behind. That is why people sometimes call them Medigap plans: they fill the gaps.

What you get in exchange for the monthly premium is predictability and freedom. There are no networks to worry about, so you can see any doctor or hospital that accepts Medicare, anywhere in the United States. That matters a lot if you split time between Florida and another state, or if you travel and want to know that a hospital stay in another city will not turn into a surprise bill. One thing a supplement does not do is cover prescription drugs, so you keep Original Medicare and a separate Part D drug plan working alongside the supplement.

Medicare Supplement Plans List: Plan A Through Plan N

Medigap plans are standardized by federal rules, which means a Plan G in Florida covers the same benefits as a Plan G in New Jersey or North Carolina. The letters run from A through N, though a few are no longer sold to people who are new to Medicare. The plans most people choose today are G and N, and a few others are worth knowing about.

Plan A is the most basic option and covers the core gaps but not the Part B deductible or excess charges. Plan C and Plan F were popular for years but are no longer available to people who became Medicare-eligible after January 1, 2020. Plan G has taken their place for most people, covering everything Plan F covered except the Part B annual deductible. Plan K and Plan L cover a percentage of costs rather than all of them, which brings the premium down, and they include an annual out-of-pocket cap. Plan N trades a lower premium for small copays at doctor visits and some emergency room trips.

What Medigap Covers That Original Medicare Doesn't

The biggest items are the ones that would otherwise come straight out of your pocket. A good supplement covers the Part A hospital deductible, the 20% coinsurance on Part B services, coinsurance for extended hospital stays beyond what Medicare pays, and coinsurance for skilled nursing facility care. Some plans also cover the first three pints of blood, Part A hospice care cost-sharing, and emergency care when you travel outside the country.

What a supplement never covers, no matter the letter, is prescription drugs, dental, vision, hearing aids, or long-term care at home. Those come from a separate Part D plan or from other coverage. I make a point of saying this plainly to clients in Fort Lauderdale, Coral Springs and Sunrise because the supplement premium sometimes makes people assume it handles everything, and it does not. Knowing the boundary before you enroll prevents an expensive surprise later.

Medicare Supplement Plans Gov: Official Resources

The official source for all of this is Medicare.gov, which publishes the standardized plan descriptions, the current nationwide cost figures, and the rules each state must follow. I recommend starting there if you want to read the federal explanation of what each letter covers, and I am happy to translate it into plain English afterward.

If you are under 65, or helping a family member who is, Medicare.gov will not be the right resource for that part of the household. Marketplace coverage is a separate system entirely, and I help people compare marketplace health insurance in Florida, New Jersey and North Carolina alongside their Medicare questions so the whole family is covered in one conversation.

Costs, Enrollment Timing, and When Health Questions Do Not Apply

The premium depends on the plan letter, your age, your zip code, whether the carrier uses gender or tobacco use in its pricing, and which state you live in. A 65-year-old in West Palm Beach, Boca Raton or Delray Beach may see a very different quote than a 65-year-old in Toms River or Brick for the same letter, and both may differ from someone in North Carolina.

Timing matters more than anything else. Your Medigap open enrollment is the 6-month period that starts the month you turn 65 and are enrolled in Part B. During that window, carriers cannot turn down your application for health reasons and cannot charge you more because of your medical history. Once that window closes, switching to a different supplement usually requires underwriting, which means the company can look at your health and decline you or price the policy higher. There are a few specific situations where your rights continue after the window, and I can walk through those with you if you think one applies.

Choosing a Medigap Plan with LYS Insurance Agency

I am an independent agent, which means I am not tied to one insurance company and I can put several carriers' quotes side by side for the same letter. I am licensed in Florida, New Jersey and North Carolina, so whether you are in West Palm Beach, Toms River or Charlotte, we can sit down, look at your doctors and your budget, and decide whether a supplement or an Advantage plan fits better. If you are curious how the two compare on cost, I keep a page on Medicare Advantage plans and their costs in Florida that lays out the tradeoffs.

If you have decided a supplement is the right fit and want to understand the paperwork, I also wrote a plain guide on how to apply for Medicare in Florida that covers the enrollment forms and timing. There is no charge for any of my help. I am paid by the carrier when you enroll, not by you, and my job is to make sure the plan you pick is one you will still be comfortable with next year. If you are under 65 and need coverage in the meantime, my guide to Marketplace health insurance near you explains the ACA options that can bridge the gap.