Comparison of Medicare Supplement Plans
A Medicare supplement plan, also called Medigap, helps pay for costs Original Medicare does not cover, such as deductibles, coinsurance, and copays. A comparison of medicare supplement plans shows that the standardized letter plans (A through N, where available) offer the same core benefits regardless of insurer, but premiums, availability, and extra perks vary. Choosing the right plan means weighing monthly cost against coverage breadth, understanding what is and is not covered, and deciding whether you value lower premiums or broader protection.
- Comparison of Medicare Supplement Plans
- How Medigap Plans Are Standardized
- At-a-Glance Comparison of Medicare Supplement Plans
- Premium Structures and What They Mean
- Trade-Offs Between Premiums and Coverage
- What Medicare Supplement Does Not Cover
- How to Choose the Right Plan
- Enrollment Timing and Guaranteed Issue Rights
- Common Misconceptions About Medigap
- Final Considerations
More from this site
Keep reading the latest coverage
How Medigap Plans Are Standardized
Congress standardized Medigap benefits so that a Plan G from one company covers the same gaps as a Plan G from another. The difference lies in price and service. In most states, insurers must offer Plan A as the base, and they may add Plan G, Plan N, and in some cases Plan C or F. High-deductible versions exist for certain plans, which lowers the monthly premium in exchange for higher out-of-pocket costs before coverage begins.
At-a-Glance Comparison of Medicare Supplement Plans
| Plan | Part A Deductible | Part B Deductible | Part A Coinsurance | Part B Coinsurance | Skilled Nursing Coinsurance | Foreign Travel Emergency |
|---|---|---|---|---|---|---|
| Plan A | No | No | Yes (days 61–90) | 80% | Yes | No |
| Plan G | No | Yes | Yes (days 61–90) | 80% | Yes | Yes |
| Plan N | No | Yes | Yes (days 61–90) | 80% (copay may apply) | Yes | Yes |
| High-Deductible Plan G | Yes (until met) | Yes (until met) | Yes (days 61–90) | 80% | Yes | Yes |
Plans C and F are no longer sold to people newly eligible for Medicare after January 1, 2020, though those already enrolled can keep them. Plan K and Plan L also exist with lower premiums but higher cost-sharing limits.
Premium Structures and What They Mean
Insurers price Medigap policies in three main ways. Community-rated plans charge the same premium regardless of age. Issue-age-rated plans base the premium on your age at enrollment, so younger buyers typically pay less. Attained-age-rated plans adjust the premium as you grow older, which can make the policy cheaper at first but more expensive over time. These pricing methods matter because two people with the same Plan G from different insurers can pay meaningfully different monthly premiums based on age, location, and underwriting.
Trade-Offs Between Premiums and Coverage
A comparison of medicare supplement plans quickly shows the central trade-off: lower premiums usually mean more out-of-pocket responsibility. Plan G offers comprehensive coverage but requires paying the Part B deductible each year. Plan A has the lowest premiums but leaves you exposed to the Part A deductible and 20% of Part B costs. Plan N can reduce premiums further, but it introduces copays for some office visits and emergency room trips. High-deductible plans can save money for those comfortable covering a larger upfront bill in exchange for a lower monthly payment.
What Medicare Supplement Does Not Cover
Medigap does not cover long-term care, vision, dental, hearing aids, private-duty nursing, or care received outside the United States (except for the limited foreign travel emergency benefit in some plans). It also does not include prescription drug coverage; you need a separate Medicare Part D plan for medications. Understanding these gaps prevents surprise bills and helps you decide whether a supplement plan alone is enough or whether you should pair it with other coverage.
How to Choose the Right Plan
Start by comparing your expected healthcare usage. If you see specialists often and want predictable costs, a comprehensive plan like Plan G may be worth the higher premium. If you are generally healthy and rarely visit the doctor, a lower-premium option like Plan N or Plan A could save money over time. Check whether your current doctors accept Medicare assignment, confirm that the plan is guaranteed-renewable, and compare premiums from multiple insurers for the same letter plan in your county.
Enrollment Timing and Guaranteed Issue Rights
The best time to buy a Medigap policy is during the six-month Medigap open enrollment period, which begins the first month you are 65 or older and enrolled in Part B. During this window, insurers cannot deny you coverage or charge more due to health history. Outside that period, insurers may medically underwrite you, which can result in higher premiums or a denial. Certain life events, such as losing employer coverage, may also trigger guaranteed-issue rights.
Common Misconceptions About Medigap
One frequent mistake is assuming that Plan F is still available to new Medicare enrollees. Another is thinking that Medigap covers prescription drugs. Some people also believe all Medigap plans from the same letter are identical in price, when in fact premiums can vary by hundreds of dollars per year between insurers for the same standardized benefit.
Final Considerations
A comparison of medicare supplement plans is less about finding the single best plan and more about finding the best fit for your health, budget, and risk tolerance. Consider both monthly premiums and potential out-of-pocket costs, confirm the insurer's reputation for claims and customer service, and revisit your choice annually during open enrollment or when your health needs change.