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Understanding AARP Supplemental Insurance: What It Covers

Supplemental insurance, often called Medigap or supplemental coverage, works alongside Original Medicare (Parts A and B) to help cover costs that Medicare doesn't pay. Original Medicare covers many medical expenses, but it leaves gaps. For example, Medicare Part A has a deductible of $1,676 per benefit period as of 2024. Medicare Part B requires you to pay 20% of approved charges for most services after you meet the annual deductible of $240. These out-of-pocket costs can add up significantly over time, especially for people with chronic conditions requiring ongoing treatment.

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Supplemental insurance policies are designed to cover these gaps. Depending on which plan you choose, supplemental coverage may help pay deductibles, copayments, and coinsurance amounts. Some plans also cover services that Original Medicare doesn't, such as certain preventive care or emergency room visits outside the United States. The specific coverage varies by plan type, and insurance companies must follow federal rules about what each plan type must cover.

There are ten standardized Medigap plans, labeled A through N. Each plan offers a different combination of coverage. For instance, Plan A covers Medicare Part A and B coinsurance and copayments, blood transfusions, and hospice care coinsurance. Plan G covers similar benefits but adds Medicare Part B excess charges—amounts doctors or other providers can legally bill above Medicare's approved amount. Plan N includes coverage for some but not all excess charges and typically has lower monthly premiums than Plan G.

Understanding what supplemental insurance covers helps you make informed decisions about your healthcare costs. A AARP supplemental insurance guide provides information about each plan type, showing which services and costs each one addresses. This information lets you compare what different plans cover and understand the relationship between what you pay monthly in premiums and what coverage you receive.

Practical takeaway: Before comparing specific plans, learn what gaps exist in Original Medicare coverage. This foundation helps you understand why supplemental insurance exists and what problems it solves for Medicare beneficiaries.

How Supplemental Insurance Premiums and Costs Work

Supplemental insurance requires monthly premium payments, and these premiums vary based on several factors. Insurance companies use different rating methods to set prices. Age is a significant factor—premiums typically increase as you grow older. In 2024, a 65-year-old might pay $100 to $150 monthly for a basic Medigap plan, while a 75-year-old for the same plan could pay $200 to $300 or more monthly, depending on the insurance company and your location.

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Your location affects premiums substantially. A Plan G policy might cost $130 monthly in one state but $180 in another. This variation reflects differences in healthcare costs, usage patterns, and how insurance companies assess risk in different regions. Urban areas sometimes have different rates than rural areas within the same state. Understanding your local pricing helps you make realistic budget plans.

Insurance companies use three main rating methods: attained age, issue age, and community rating. Attained age rating means premiums increase as you get older. Issue age rating sets your initial premium based on your age when you buy the policy, and premiums still increase with age but typically more slowly than attained age plans. Community rating means everyone in a geographic area pays the same premium regardless of age, though this method is less common for Medigap policies.

Many people purchase supplemental insurance during their initial enrollment period, which is the six-month window starting the month they turn 65 and enroll in Medicare Part B. During this period, most states prohibit insurance companies from denying coverage or charging higher premiums based on health conditions—called guaranteed issue rights. If you enroll outside this window, insurers may review your health history and could charge more or deny coverage in some cases.

Annual premium increases are common. Insurance companies request rate increases annually, and state regulators review these requests. Some years increases might be 3% to 5%, while other years could see larger jumps, particularly during economic shifts or if claims experience changes within a plan. Many people review their supplemental insurance annually to see if switching plans might reduce their costs.

Practical takeaway: When comparing supplemental insurance options, look at both the current monthly premium and consider how premiums might change over time. Calculate your estimated out-of-pocket costs by combining the monthly premium with typical medical expenses and remaining Medicare deductibles and copayments.

AARP's Role in Supplemental Insurance Information and Offerings

AARP is a membership organization serving people 50 and older, with over 38 million members. The organization doesn't directly provide insurance but partners with insurance carriers to offer Medigap and other health insurance products under the AARP brand. These policies are underwritten by insurance companies such as UnitedHealthcare and Aetna, which handle claims and customer service.

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AARP publishes extensive information about Medicare and supplemental insurance options. Their guides explain how Original Medicare works, what Medigap plans cover, and how to compare options. These resources present factual information about the insurance landscape, helping readers understand their choices. AARP's educational materials explain terms like deductibles, copayments, and premiums in plain language accessible to people without insurance background.

When people refer to an "AARP supplemental insurance guide," they typically mean educational materials created by AARP or available through AARP's website that explain Medigap options. These guides serve as reference materials, not as applications or enrollment documents. The guide explains what different plans cover, how costs work, and what questions to consider when evaluating options. This information helps Medicare beneficiaries compare AARP-branded policies with those from other insurers.

AARP also offers resources about Medicare-related topics beyond just Medigap, including information about Medicare Advantage plans, prescription drug coverage, and long-term care insurance. Their website provides comparison tools where you can see how different plans stack up against each other based on coverage and cost. These tools let you enter your information and see how various options might work for your specific situation.

It's important to note that AARP-branded insurance products carry insurance company names and are regulated by state insurance departments, just like any other insurance. The AARP brand indicates a partnership with insurers, but AARP doesn't itself issue insurance policies or make coverage decisions. When you purchase AARP-branded supplemental insurance, your contract is with the insurance company, not with AARP.

Practical takeaway: Use AARP's informational resources to learn about supplemental insurance generally, and then compare AARP-branded policies with options from other insurance companies to see which offers the best combination of coverage and cost for your circumstances.

Comparing Different Medigap Plan Types and Coverage Options

The standardized Medigap plans provide a framework for comparing options. Because federal regulations require that Plan A offered by one company must cover the same benefits as Plan A from any other company, you can directly compare prices across insurers for the same plan. This standardization makes comparisons straightforward—a lower-cost Plan A from Company X is genuinely cheaper for the same coverage as Plan A from Company Y.

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Each plan type appeals to different people based on their medical needs and budget priorities. Plan A is the most basic, covering the most common cost-sharing amounts but not excess charges. It's often the least expensive option. Plan G is more comprehensive, including coverage for excess charges that doctors might bill beyond Medicare's approved amounts. Plan G typically costs more monthly but may result in lower total out-of-pocket costs if you need frequent doctor visits or specialist care. Plan N is a middle ground, covering many costs but requiring small copayments for office visits and emergencies.

Plans differ in what services they cover beyond basic cost-sharing. Some plans include coverage for skilled nursing facility coinsurance, which can matter if you need rehabilitation after hospitalization. Others cover foreign emergency care for travel. Plan coverage levels range from high (Plans F and G, which are no longer available to new beneficiaries) to basic (Plans A and B). Understanding your anticipated healthcare needs helps determine which plan type might work best for you.

Age and gender don't affect what a plan covers—only the premium price. A 70-year-old and a 65-year-old with the same plan type receive identical coverage, though they pay different premiums. Health status also doesn't affect coverage or which plan type you receive (outside the initial enrollment period), but it may affect whether you can get coverage at all if you enroll