Where to Compare Medicare Supplement Plans Online
Understanding What You’re Comparing: Medigap Basics in 2 Minutes
Medicare Supplement Insurance, commonly called Medigap, is a set of private insurance plans designed to pay many out-of-pocket costs that Original Medicare (Parts A & B) does not cover. These costs include deductibles, coinsurance, and copayments for hospital and medical care. Medigap plans work only with Original Medicare and never with Medicare Advantage. For a comprehensive guide to switching between these, see Can You Switch Back to Medicare from Medicare Advantage?.
In most states, Medigap plans are standardized and identified by letters A through N. This means every plan G, for example, offers the exact same benefits no matter which company sells it. The core differences between plans are:
- Which out-of-pocket costs they cover
- The size of your monthly premiums
- Premium pricing method (e.g., Attained Age, Issue Age)
Common features covered (depending on plan letter) include:
- Medicare Part A hospital coinsurance plus up to 365 additional hospital days
- Medicare Part B coinsurance or copayment
- The first three pints of blood
- Hospice care coinsurance or copayment
- Skilled nursing facility (SNF) coinsurance (in some plans)
- Part A deductible, Part B excess charges, some foreign travel emergencies
Most comprehensive:
• Plan F: Only available to those Medicare-eligible before 2020; covers everything including the Part B deductible.
• Plan G: Highest coverage for those first eligible in 2020 or later (covers everything Plan F does except the Part B deductible).
Lower-cost alternatives:
• Plan N: Lower premium, small copayments for office ($20) and ER visits ($50, if not admitted).
• Plans K & L: Cover 50% or 75% of most benefits, then pay 100% after meeting their annual out-of-pocket maximums ($8,000 for K and $4,000 for L in 2026).
High-deductible options:
• High-deductible Plan F/G: You pay all costs until you reach the annual deductible ($2,950 for 2026), then the plan pays.
Medigap plans do not cover prescription drugs (you’ll need a separate Part D plan), dental, vision, or hearing. For in-depth detail about why dental isn’t included in Medicare, check Why Medicare Doesn’t Cover Dental: 2026 Facts & Options and for drug coverage specifics visit Which Part of Medicare Covers Prescription Drugs?.
The Best Places to Compare Medicare Supplement Plans Online
1. Medicare.gov Medigap Tools
Medicare.gov is the official, most authoritative resource for comparing Medigap plans because all plans are standardized by law. Two must-use resources are:
- “Compare Medigap Plan Benefits” chart: See exactly which benefits each plan provides (A-N).
- “Find a Medigap Policy” tool: Enter your ZIP code and see which companies sell each plan in your area with estimated premiums.
These tools ensure you’re comparing accurate, up-to-date plan structures for 2026 and beyond.
2. Independent Medigap Comparison Tools
NerdWallet and Medigap.com offer quick ways to compare Medicare Supplement plans side-by-side. NerdWallet provides clean Medigap benefit tables and highlights which plans offer “highest coverage” or “lower premiums but higher copays.” Medigap.com allows you to view prices from multiple insurers for Medigap, Medicare Advantage, and Part D.
Comparing results from at least one of these sites alongside Medicare.gov can help you find not just the lowest premium, but also uncover factors such as rate-increase history and provider reputation.
3. Insurer and Broker Websites
Major insurers (e.g., Blue Cross Blue Shield, Aetna, Cigna) and brokers (e.g., SelectQuote) show you their Medigap plan options and help you compare Medigap premiums. They emphasize that, for a given plan letter, benefits are identical-so you should compare only on price, service, and company strength.
It’s smart to check at least one independent site (like Medigap.com) so you’re not limited to quotes from just a single insurer or broker.
Remember: Use Medicare.gov for the official coverage comparison and at least one outside comparison tool for local premiums and real-world company differences. For comprehensive enrollment guidance, refer to the guide on First Time Medicare Enrollment: 2026 Guide & Timelines.
Step‑by‑Step: How to Compare Medigap Plans Like an Expert
- Confirm your base choice:
Medigap only works with Original Medicare, not Medicare Advantage. If having access to any provider nationwide is your priority, you’re likely best suited for Medigap.
For those considering switching, see Can You Switch Back to Medicare from Medicare Advantage? for the process. - Clarify your priorities:
Decide if lower monthly premiums (with copays/coinsurance) or maximum predictability-and flexibility-are most important.- Lowest bills for care users: Plan G or F
- Lowest monthly premium but higher out-of-pocket: Plan N, K, or L
- If you travel frequently or anticipate large hospital bills, favor plans that include foreign travel and SNF coinsurance (e.g., G, N, M, D, C, F).
- Use the “Compare Medigap Plan Benefits” chart:
Review the Medicare.gov Medigap plan comparison chart and focus on features like Part A deductible, Part B excess charges, and out-of-pocket maximums. Shortlist 1-3 plan letters that fit your needs. - Check latest out-of-pocket limits and deductibles:
For 2026, Plan K ($8,000) and Plan L ($4,000) are capped. Review if a high-deductible plan (F/G) makes sense ($2,950 deductible in 2026). - Get real-world premium quotes by plan and company:
Enter your ZIP code in the Medicare.gov “Find a Medigap Policy” tool. Compare direct insurer/broker quotes and at least one independent site (NerdWallet, Medigap.com). Remember: for the same letter, only pricing and carrier reputation vary, not medical coverage. - Compare Medigap plus Part D vs. Medicare Advantage:
Before enrolling, sanity-check your choice. Use online tools to estimate Medigap + Part D annual costs versus local Medicare Advantage plans (keep flexibility, copays, and maximum out-of-pocket in mind). See also How Do I Disenroll from Medicare Advantage Plan in 2026? if you later want to switch. - Choose based on total yearly cost, not just premium:
Tally projected annual premiums, deductibles, coinsurance, and out-of-pocket costs for each plan and option. For frequent care users, the higher-priced Medigap premium may yield much lower and more predictable bills than Medicare Advantage.
Comparing Medigap vs Medicare Advantage When You Use Online Tools
Many comparison tools-including those at Medicare.gov, NerdWallet, and leading consumer groups-let you analyze Medigap and Medicare Advantage side by side. Here’s how key differences appear when you compare Medigap plans versus Medicare Advantage:
| Feature | Original Medicare + Medigap | Medicare Advantage |
|---|---|---|
| Doctor/Provider Access | Any U.S. provider accepting Medicare | Usually HMO/PPO; limited network |
| Premiums | Higher (Medigap premium + Part B + Part D) | Often low or $0 (plus Part B costs) |
| Copays/Coinsurance | Very low/predictable if you use care | Can be high; varies by service |
| Out-of-pocket Max (2026) | None or limited (Plans K/L) | Up to $9,250 (in-network) |
| Drug Coverage | Separate Part D required | Usually included |
| Extras (Dental, Vision, Hearing) | No (buy separately) | Often included |
| Travel Coverage | Some plans cover ER abroad; any U.S. provider | Usually limited by network/region |
For in-depth info about the pros and cons of each track, as well as help with disenrolling, see How Do I Disenroll from Medicare Advantage Plan in 2026?.
How to maximize comparisons:
- Use Medicare.gov’s comparison tools for impartial plan structure and coverage data.
- Check at least one consumer site for guides on Medigap vs. Medicare Advantage.
- Always run two quotes (Medigap + Part D vs. Medicare Advantage) to estimate total yearly costs and check any specialist/provider network implications.
Common Mistakes to Avoid When Comparing Medicare Supplement Plans
- Shopping only by premium: Benefits for a given plan letter are federally standardized-focus also on rate-increase trends and insurer reliability.
- Confusing Medicare Supplement with Medicare Advantage: Never buy both. Medigap cannot be paired with Medicare Advantage.
- Assuming Medigap includes extras: Prescription drugs, dental, vision, and hearing are not included. Add a separate Part D plan or other coverage as needed. Further reading at Which Part of Medicare Covers Prescription Drugs? and Why Medicare Doesn’t Cover Dental: 2026 Facts & Options.
- Forgetting to check provider networks for Medicare Advantage: Don’t overlook that Medigap offers provider freedom; Advantage plans may restrict you to network providers.
- Neglecting out-of-pocket maximums: Original Medicare has none; Medigap K and L limit annual exposure, whereas Medicare Advantage always has one (but can be high).
- Not considering your care usage: Chronic conditions or frequent doctor visits often mean Medigap yields greater savings and predictability in total costs.
Quick Checklist: What to Do Next
- Clarify your path: Decide whether you want Original Medicare + Medigap (maximum choice, predictable costs) or Medicare Advantage (lower premiums, more extras, but network limits).
- Shortlist 1-3 plan letters: Use Medicare.gov’s plan comparison chart to focus on popular options such as G, N, K, or L.
- Shop for quotes: Use official and independent sites-Medicare.gov for structure, an independent like Medigap.com for real-world premium comparisons.
- Add up costs: For Medigap, tally your annual Medigap, Part B, and Part D premiums; for Medicare Advantage, factor in low or $0 premiums plus possible copays up to the MOOP (Maximum Out-of-Pocket).
- Check for extras and provider rules: Don’t forget travel, network coverage, and potential need for standalone dental or vision policies if you choose Medigap. Review Why Medicare Doesn’t Cover Dental for detailed info.
- Enroll at the right time: Once you’ve made your choice, complete enrollment during the Initial Enrollment Period, an open enrollment window, or a Special Enrollment Period, as described in First Time Medicare Enrollment: 2026 Guide & Timelines.
If you share your state, age, and how often you use care or travel, you can get tailored suggestions for 1-2 best Medigap plan letters plus a Medicare Advantage comparison.
