Don't Let Original Medicare Leave You Exposed to Big Bills

Turning 65 marks a big milestone, and for many Americans, it means navigating the complexities of Medicare. While Original Medicare (Parts A and B) covers a significant portion of your healthcare costs, it doesn't cover everything. You might be surprised at the gaps.

These gaps can leave you on the hook for substantial out-of-pocket expenses, especially if you face an unexpected illness or chronic condition. This is where a Medigap plan, also known as Medicare Supplement Insurance, steps in. It helps cover those costs that Original Medicare doesn't.

Understanding Original Medicare's Gaps: Why Medigap Matters for Your Wallet

Original Medicare has several cost-sharing requirements that can quickly add up. For example, in 2026, the Part A deductible for each benefit period could be around $1,700, and you might face multiple benefit periods in a single year. Part B covers 80% of approved services after you meet a small annual deductible, but that remaining 20% can be a hefty sum for hospital outpatient services, doctor visits, and durable medical equipment.

Consider a scenario: you have a minor surgery and several follow-up appointments. Without Medigap, you'd pay your Part B deductible, then 20% of every approved charge. If your total Part B costs hit $20,000 in a year, you'd owe $4,000 out of pocket, plus any Part A deductibles if you had an inpatient stay. Medigap plans are designed to help cover these significant expenses, offering financial predictability.

The Critical Medigap Open Enrollment Period: Don't Miss This Deadline

The single most important factor in choosing a Medigap plan is often *when* you enroll. Your Medigap Open Enrollment Period is a six-month window that begins the month you turn 65 and are enrolled in Medicare Part B. During this time, you have guaranteed issue rights.

This means insurance companies must sell you any Medigap policy they offer, regardless of your health conditions. They cannot charge you higher premiums or deny you coverage because of your medical history. If you miss this crucial window, you might be subject to medical underwriting, which could lead to higher premiums or even denial if you have pre-existing conditions.

Deciphering Medigap Plans: What Each Letter Covers

Medigap plans are standardized across most of the U.S., meaning a Plan G from Aetna offers the exact same benefits as a Plan G from UnitedHealthcare. The only difference is the premium charged by each company. This standardization simplifies comparisons significantly.

Plans are identified by letters (A, B, D, G, K, L, M, N). If you were eligible for Medicare *before* January 1, 2020, you might also have access to Plans C and F, which cover the Part B deductible. However, for most new Medicare enrollees in 2026, Plans C and F are no longer an option. Let's focus on the most common plans available today.

*Plan N covers Part B coinsurance at 100%, except for a copayment of up to $20 for some office visits and up to $50 for emergency room visits that don't result in an inpatient admission.

Choosing Your Medigap Plan Based on Health Needs and Budget

Your ideal Medigap plan depends on your health, financial situation, and risk tolerance. There's no single 'best' plan for everyone. Think about your anticipated medical needs and what level of out-of-pocket spending you're comfortable with.

1. For Maximum Coverage and Predictability: Plan G

• Who it's for: People who want almost all out-of-pocket costs covered, offering the most comprehensive benefits for new enrollees. It covers everything Original Medicare doesn't, except the Part B deductible. Plan G also covers Part B excess charges, which can be significant in some areas of the country. This is ideal if you have chronic conditions, anticipate frequent doctor visits, or simply want peace of mind against unexpected, high medical bills.

1. For Balanced Coverage with Lower Premiums: Plan N

• Who it's for: Individuals who are generally healthy but want good coverage for major events, and are willing to pay some small copayments. Plan N typically has lower monthly premiums than Plan G. You'll pay up to a $20 copay for some office visits and up to a $50 copay for emergency room visits that don't lead to an inpatient admission. It does not cover Part B excess charges, so be aware if you live in a state that allows doctors to charge above Medicare-approved amounts.

1. For High-Deductible Savings: High-Deductible Plan G

• Who it's for: This plan has a much lower monthly premium but requires you to pay a high annual deductible (around $2,800 in 2026) out of pocket before the plan starts paying. Once you meet the deductible, it functions like a regular Plan G, covering nearly all remaining costs. This is a strong option for very healthy individuals with a substantial emergency fund who want catastrophic coverage and the lowest possible monthly premium.

1. For Cost Sharing: Plans K and L

• Who it's for: These plans cover a percentage of costs, rather than 100%. Plan K covers 50% of most costs, and Plan L covers 75%, up to an annual out-of-pocket limit. They have the lowest premiums but require you to pay a significant portion of your medical bills until you hit the out-of-pocket maximum. These are best suited for those comfortable with higher risk and lower premiums, typically with excellent health and a robust savings cushion.

Real-World Scenarios: Finding Your Medigap Fit

Let's look at how different life situations might lead to different Medigap choices:

• The 'What If' Planner (Age 65, Houston, TX): Sarah has a history of high blood pressure and wants maximum predictability. She worries about unexpected hospital stays and doctor bills. She doesn't want to think about copays or coinsurance. For Sarah, Plan G is likely the best fit. It covers her Part B deductible, Part A and B coinsurance, and protects against Part B excess charges, which are allowed in Texas. She values the peace of mind, even if it means a higher monthly premium of around $150-$200.

• The 'Healthy & Budget-Minded' (Age 66, Phoenix, AZ): Mark is active and generally healthy, with few doctor visits. He has a solid emergency fund but wants to keep his monthly premiums low. He's okay with small copays for routine visits. Plan N makes sense for Mark. He'd pay a monthly premium closer to $100-$140, plus small copays for doctor and ER visits. He's comfortable taking on the risk of Part B excess charges because his doctors don't typically charge above Medicare-approved amounts.

• The 'High-Deductible Saver' (Age 68, Denver, CO): Emily is very healthy, has substantial retirement savings, and travels frequently. She wants the lowest possible monthly premium but still needs protection against a major medical event. A High-Deductible Plan G is a strong contender. Her premium might be as low as $40-$70 per month. She's confident she can cover the annual deductible if needed, knowing that after that, her coverage is comprehensive, including foreign travel emergencies.

Comparing Medigap Providers: It's All About Price and Service

Since Medigap plans are standardized by letter, the critical difference between providers like UnitedHealthcare (AARP), Aetna, Humana, or local Blue Cross Blue Shield affiliates is the premium. Premiums can vary by hundreds of dollars annually for the exact same plan letter, even within the same state or zip code.

Insurance companies use different rating methods:

• Attained-Age Rated: Premiums are based on your current age, increasing as you get older. This is common and often starts with lower premiums.
• Issue-Age Rated: Premiums are based on your age when you first bought the policy, remaining stable or only increasing due to inflation, not your age. This can be more expensive initially but offers long-term predictability.
• Community-Rated: Everyone in a given area pays the same premium, regardless of age. This offers the most stable long-term pricing.

Many companies also offer household discounts, typically 5-7%, if you and your spouse (or another household member) both enroll in one of their Medigap plans. Always ask about these potential savings when getting quotes.

Next Steps: Actionable Advice for Your Medigap Journey in 2026

Making the right Medigap choice can save you thousands of dollars and provide crucial peace of mind. Here's how to move forward:

• Review Your Health: Honestly assess your current health and any anticipated medical needs. Do you have chronic conditions? Do you travel internationally often? This will guide your plan choice.
• Consult Your State's SHIP Program: These free, unbiased counseling services can provide personalized advice and help you compare plans available in your specific area. They can also explain state-specific rules.
• Get Multiple Quotes: Contact at least three to five different insurance companies offering the Medigap plan letter you've identified as best for you. Compare premiums, customer service ratings, and any household discounts. You can use online comparison tools or work with an independent insurance broker.
• Understand Enrollment Deadlines: Reiterate the importance of your initial six-month Medigap Open Enrollment Period. This is your best chance to secure coverage without medical underwriting.

Take action today to compare Medigap plans and secure the coverage that fits your health needs for 2026.