Your Quarterly Medicare Newsletter: What is Medigap, and Do You Need It?

What is Medigap, and Do You Need It?

As you approach or reach the age of 65, it's time to become familiar with your Medicare choices and what the program has to offer. Original Medicare, comprising Parts A and B, provides essential healthcare coverage but leaves some potential gaps that can be addressed to help manage out-of-pocket expenses. This is where Medigap, also known as Medicare Supplement Insurance, comes into play. Medigap is designed to fill these gaps by covering costs that original Medicare doesn't, such as copayments, coinsurance, and deductibles. Understanding what Medigap covers—and what it doesn't—can help you decide if it's something you'd like to explore.^1,2

Medigap aims to make healthcare costs more predictable and manageable by covering a variety of out-of-pocket expenses not covered by the original Medicare. These plans reimburse you for copayments, coinsurance, and deductibles that you would otherwise have to pay yourself.^1,2

However, note what Medigap does not cover. Unlike some Medicare Advantage plans, Medigap does not cover dental, vision, or prescription drugs. If you need these services, you'll have to purchase separate plans. For prescription drugs, enrolling in a Medicare Part D plan is necessary.^1,2

Medigap vs. Medicare Advantage

When deciding between Medigap and Medicare Advantage, understanding the key differences in their coverage approaches is important. Medigap is a supplemental policy that works in conjunction with Original Medicare to cover additional out-of-pocket expenses. In contrast, Medicare Advantage (Part C) is an alternative way to receive your Medicare benefits through private health plans, often bundling hospital, medical, and sometimes prescription drug coverage into a single plan.^1,2

One difference is that Medigap allows you to see any provider that accepts Medicare, which may give you more freedom of choice. On the other hand, Medicare Advantage plans typically have a network of designated providers, which may limit your options and require referrals for specialists.^1,2

It's important to note that you cannot enroll in both Medigap and Medicare Advantage simultaneously. Therefore, choosing the right option depends on your healthcare needs and financial situation.^1,2

If you value flexibility and want predictable out-of-pocket costs, Medigap may be worth consideration. However, if you're looking for a plan that bundles multiple types of coverage, including additional services such as dental and vision, Medicare Advantage may be worth a second look. Please note that with Medicare Advantage, your out-of-pocket costs may vary, and network restrictions may apply.

Ultimately, the decision between Medigap and Medicare Advantage should be based on your healthcare priorities, budget, and lifestyle. Consider consulting with a Medicare professional to evaluate your specific needs and explore the options available in your area. Understanding these differences can help you make an informed decision.

When and How to Enroll in Medigap

The 6-Month Medigap Open Enrollment Period

The 6-month Open Enrollment Period is the window for individuals considering the purchase of a Medigap policy. This period begins the first month you are 65 or older and enrolled in Medicare Part B. During these six months, you have the best opportunity to purchase a Medigap plan because insurers are required to offer you a policy, regardless of any pre-existing health conditions. This is known as having "guaranteed issue rights."^3,4

Timing is essential because once this open enrollment period closes, you may face medical underwriting if you try to buy a Medigap policy. Medical underwriting involves a review of your health status, and depending on your condition, insurers can deny you coverage or charge higher premiums. Therefore, enrolling during this period can help you receive the best rates and access to any Medigap plan available in your area without the risk of being turned down or charged more.^3,4

Special Circumstances and Guaranteed Issue Rights

There are certain special circumstances where you may still have guaranteed issue rights outside of the initial enrollment period. For example, if you lose employer-sponsored health coverage, you have a guaranteed right to purchase a Medigap policy. This is designed so you won’t be left without supplemental coverage when transitioning from employer insurance to Medicare.^3,4

Another situation that grants guaranteed issue rights is if you move out of the service area of your Medicare Advantage plan. In such cases, you are allowed to switch back to Original Medicare and purchase a Medigap policy without going through medical underwriting. Additionally, if your Medigap plan is discontinued or the insurance company goes bankrupt,  you have the opportunity to purchase another Medigap policy.^3,4

Switching Medigap Plans Later

Switching Medigap plans after your initial enrollment period can be more complicated. Generally, you can apply to switch plans at any time, but approval goes through a process. Outside the open enrollment period or in special circumstances, insurers may require you to undergo medical underwriting. This means they can assess your health status and decide whether to move forward with your application or set your premium rate.^3,4

However, some states have specific protections that allow you to switch Medigap plans without medical underwriting, even outside the initial enrollment period. For instance, states like Connecticut, Massachusetts, Maine, and New York have regulations that permit policyholders to change Medigap plans without facing underwriting questions. These state-specific guidelines for added flexibility for individuals seeking to adjust their coverage as their healthcare needs change.^3,4

Understanding the timing and conditions under which you can enroll in or switch Medigap plans is important for making informed decisions about your healthcare coverage. By enrolling during the initial open enrollment period or taking advantage of special circumstances, you can sign up for a Medigap policy that is designed to meet your needs without the hurdles of medical underwriting.

March 31: Medicare Advantage Open Enrollment ends
Your 65th Birthday Month: Medigap Open Enrollment Period begins (6 months)
October 15: Medicare Open Enrollment Period begins
December 7: Medicare Open Enrollment Period ends

<sup>1. Medicare.gov, October 7, 2025.
2. Medicare.gov, October 7, 2025.
3. Medicare.gov, October 7, 2025.
4. Medicare.gov, October 7, 2025.</sup>