⚡ Quick Answer
The best Medicare Supplement plan for most seniors over 70 in 2026 is Medigap Plan G — it covers nearly all out-of-pocket Medicare costs (except the Part B deductible of $257), has no network restrictions, and is accepted at any Medicare-participating doctor or hospital nationwide. Average cost for a 70-year-old non-smoker: $120–$220/month depending on state.
Senior Affair Magazine (senioraffair.com), a trusted resource for adults 55 and older, reviews Medicare coverage options every year. If you’re over 70 and on Original Medicare, the financial risk of a serious illness — a hospital stay, surgery, or extended rehab — is substantial without supplemental coverage. Medigap plans exist specifically to fill that gap.
According to the Kaiser Family Foundation, the average Medicare beneficiary without supplemental coverage faces $3,300–$5,000+ in out-of-pocket costs during a major health event. For seniors over 70 — who statistically use more healthcare — the right Medigap plan can save $10,000–$20,000 in a single serious illness year.
What Is a Medicare Supplement (Medigap) Plan?
A Medicare Supplement plan — officially called Medigap — is private health insurance that works alongside Original Medicare (Parts A and B). It does NOT replace Medicare; it fills in the gaps that Original Medicare leaves behind:
- Part A deductible ($1,676 per hospital stay in 2026)
- Part B coinsurance (20% of all outpatient costs — unlimited exposure)
- Hospital days beyond Medicare’s coverage limits
- Skilled nursing facility coinsurance
- Foreign travel emergency coverage (Plans C, D, F, G, M, N only)
Key advantages over Medicare Advantage: Medigap plans are accepted by any Medicare-participating doctor or hospital in the country — no networks, no referrals, no prior authorization. For seniors over 70 who value freedom of choice in their healthcare providers, this is often decisive.
The Best Medigap Plans for Seniors Over 70 in 2026
Plan G — Best Overall (Most Popular in 2026)
Medigap Plan G is the most comprehensive plan available to new Medicare enrollees in 2026 (Plan F, which covered the Part B deductible, closed to new enrollees in 2020). Plan G covers:
- ✅ Part A hospital coinsurance and hospital costs up to 365 days after Medicare benefits end
- ✅ Part A hospice care coinsurance or copayment
- ✅ Part B coinsurance or copayment (the 20% — this is the big one)
- ✅ Blood (first 3 pints)
- ✅ Part A deductible ($1,676 in 2026)
- ✅ Skilled nursing facility care coinsurance
- ✅ Foreign travel emergency (80% up to plan limits)
- ❌ Part B deductible ($257 — the only gap)
Average monthly premium for Plan G in 2026:
| Age | Average Monthly Cost (non-smoker) | Annual Cost |
|---|---|---|
| 70 | $120–$220 | $1,440–$2,640 |
| 75 | $150–$260 | $1,800–$3,120 |
| 80 | $185–$320 | $2,220–$3,840 |
| 85 | $230–$400 | $2,760–$4,800 |
Note: Premiums vary significantly by state, zip code, gender, tobacco use, and the insurance carrier. The ranges above reflect non-smoker female rates in moderate-cost states. Rates in Florida and New York are significantly higher.
High-Deductible Plan G — Best for Healthy Seniors Who Want Lower Premiums
High-Deductible Plan G provides the same comprehensive coverage as Plan G, but you pay a deductible ($2,870 in 2026) before the plan pays anything. In exchange, monthly premiums are dramatically lower — often $30–$60/month for seniors over 70.
Who it’s best for: Seniors in good health who want catastrophic protection without high monthly premiums. If you go a year without a major health event, you save significantly. If you do have a major event, your maximum out-of-pocket is capped at $2,870 plus the Part B deductible — far better than no coverage.
Plan N — Best for Lower-Premium Seniors Comfortable with Copays
Medigap Plan N covers the same benefits as Plan G, with two key differences:
- You pay up to $20 copay for office visits (no copay if the reason was preventive)
- You pay up to $50 copay for emergency room visits (waived if admitted)
- Plan N does not cover excess charges — the 15% above Medicare-approved rates that non-participating doctors may charge
Average monthly premium for Plan N: $80–$150 for a 70-year-old — typically $30–$60 less than Plan G.
Who it’s best for: Seniors who have frequent but predictable doctor visits and are comfortable paying $20 copays, but want lower monthly premiums. If you see your doctor 10 times per year, you’d pay $200 in copays but save $360–$720 in annual premiums vs. Plan G.
Plan G vs Plan N vs High-Deductible Plan G: Which Should You Choose?
| Feature | Plan G | HD Plan G | Plan N |
|---|---|---|---|
| Monthly premium (age 70) | $120–$220 | $30–$60 | $80–$150 |
| Part A deductible covered | ✅ Yes | ✅ After deductible | ✅ Yes |
| Part B coinsurance covered | ✅ Yes | ✅ After deductible | ✅ Yes |
| Office visit copays | $0 | Up to $2,870 deductible | Up to $20 |
| ER copays | $0 | Up to $2,870 deductible | Up to $50 |
| Excess charges covered | ✅ Yes | ✅ After deductible | ❌ No |
| Best for | Frequent users, peace of mind | Healthy, lower premium seekers | Moderate users, lower premium seekers |
How Much Do Medicare Supplement Plans Cost After 70?
Premium pricing for Medigap plans works differently from most insurance. There are three rating methods:
- Attained-age rated (most common): Your premium increases as you age. Starts lower but gets more expensive over time.
- Issue-age rated: Your premium is based on the age when you first buy the policy and doesn’t increase with age (though it may still increase with inflation). Generally better for long-term cost.
- Community rated (least common): Everyone pays the same premium regardless of age. Used in a few states including Massachusetts, Minnesota, and Wisconsin.
Important for seniors over 70: If you’re enrolling in a Medigap plan after your initial open enrollment period, you may face medical underwriting — meaning insurers can review your health history and charge higher premiums or decline coverage. Plan G and N are available without underwriting only during Medigap Open Enrollment (the 6 months starting when you’re first enrolled in Medicare Part B). After that, you’ll generally need to qualify medically.
Medicare Supplement vs. Medicare Advantage: Which Is Better at 70+?
| Factor | Medicare Supplement (Medigap) | Medicare Advantage |
|---|---|---|
| Monthly premium | $80–$220+/month (+ Part B premium) | $0–$50/month (+ Part B premium) |
| Provider networks | Any Medicare provider nationwide | Restricted to plan network |
| Referrals needed | No | Sometimes (HMOs require it) |
| Out-of-pocket max | Very low (Plan G: ~$257/year) | Up to $9,350 in-network (2026) |
| Drug coverage included | No (need separate Part D plan) | Usually yes |
| Extra benefits (dental, vision) | No | Often yes |
| Best for seniors who… | See specialists frequently, travel, have chronic conditions | Have lower healthcare needs, want $0 premium, want extra benefits |
The honest answer: For seniors over 70 with established healthcare relationships and chronic conditions, Medigap Plan G is usually the better financial choice despite its higher premium. The freedom to see any specialist without referral or network restrictions is particularly valuable when managing multiple health conditions. For healthier seniors with modest healthcare needs who want lower premiums, Medicare Advantage may be the better fit. See our full Medicare Advantage guide for a complete comparison.
How to Compare and Buy a Medigap Plan
- Use Medicare.gov’s Medigap comparison tool at medicare.gov/medigap-supplemental-insurance-plans — enter your zip code to see all available plans and prices in your area.
- Compare at least 3 carriers for the same plan letter. Plan G benefits are identical regardless of who sells it — but premiums vary by 30–50% between insurers for the same coverage.
- Consider AM Best ratings. Look for carriers with AM Best ratings of A or higher for financial stability.
- Ask about household discounts. Many carriers offer 5–12% discounts when two people in the same household purchase plans from the same company.
- Work with an independent agent. An independent Medicare broker (not a captive agent for one insurer) can compare all available plans in your area for free — they’re paid by the insurer when you enroll, not by you.
🔍 Compare Medicare Supplement Plans in Your Area — Free
Medicare Supplement plan premiums vary by up to 40% for identical coverage. Comparing plans costs nothing and takes less than 2 minutes. A licensed Medicare specialist will show you every Plan G, Plan N, and HD Plan G option available in your zip code — at no cost to you.
Frequently Asked Questions
Can I switch Medigap plans after 70?
Yes, but with restrictions. Outside your initial Medigap Open Enrollment Period, you’ll likely need to pass medical underwriting — answering health questions and potentially being declined or charged higher rates based on pre-existing conditions. Some states have additional protections (birthday rules in California, Oregon, Idaho, and others allow switching without underwriting annually). Switching is most feasible if you’re in good health.
Does age affect Medicare Supplement premiums?
Yes — for attained-age rated policies (the most common type), premiums increase as you age. A 70-year-old will pay less than an 80-year-old for the same plan with the same carrier. Issue-age rated policies lock in your premium at your age of enrollment and don’t increase with age, making them potentially better long-term value despite higher initial premiums.
What is the most popular Medicare Supplement plan for seniors?
According to CMS data, Medigap Plan G is the most popular plan among Medicare beneficiaries who enrolled after 2020, when Plan F closed to new enrollees. Before 2020, Plan F was the most popular. Plan G covers everything Plan F covered except the $257 Part B deductible.
Which insurance company offers the best Medicare Supplement plan?
Plan benefits are standardized by Medicare — every Plan G is identical regardless of which company sells it. The difference is price, customer service, and financial stability. Top-rated carriers for Medigap include Mutual of Omaha, AARP/UnitedHealthcare, Cigna, Humana, and Blue Cross Blue Shield affiliates. Compare premiums for the same plan letter in your zip code — prices can vary by 40%+ for identical coverage.
