Medicare Supplement plans (like Plan G and Plan N) and Medicare Advantage plans aim to cover what Original Medicare doesn’t — but they structure your coverage in much different ways. Between network rules, out-of-pocket costs, and access to additional benefits, breaking down which plan type works for you can get quickly overwhelming.
If you’re confused about how to choose Medicare Supplement vs. Medicare Advantage, you’re not alone. Here’s what you need to know about how these plan options work, which one could fit your needs, and how you can switch from one to the other, if needed.
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Medicare Supplement Plan G vs. Plan N vs. Medicare Advantage at a glance
| Feature | Plan G Medicare Supplement | Plan N Medicare Supplement | Medicare Advantage Part C |
|---|---|---|---|
| Monthly premium | Higher Pays for fuller protection | Medium Balanced cost & coverage | Low to $0 Trade-offs apply |
| Networks | Any provider that accepts Medicare assignment | Any provider that accepts Medicare assignment | Subject to carrier regional or local networks with higher out-of-network costs |
| Prior authorization | Only subject to Medicare prior authorization in some states — not required by Plan carrier | Only subject to Medicare prior authorization in some states — not required by Plan carrier | Required by plan carrier in most cases |
| Specialist referrals | Typically not required | Typically not required | Depends on plan type, but may be required |
| Out-of-pocket maximum | Out-of-pocket costs covered after paying Part B deductible | Out-of-pocket costs covered after paying Part B deductible and visit copays from $20 to $50 | Set by the carrier; can reach up to $9,250 for in-network care or $13,900 for combined in-network and out-of-network care in 2026 |
| Prescription drug coverage | Add a separate Part D plan | Add a separate Part D plan | Usually included |
| Extra benefits (dental, vision, fitness, grocery, etc.) | Not built in | Not built in | Included in most plans |
Medicare Advantage out-of-pocket maximums shown are CMS limits for 2026 and vary by plan. Plan G and Plan N are Medicare Supplement (Medigap) policies; benefits are standardized, premiums are not.
What’s the difference between Medicare Advantage and Medicare Supplement Plan G?
One of the primary differences between Medicare Advantage and Medicare Supplement, or Medigap, comes down to what care is available and how it’s billed.
Medicare Advantage (Part C) uses a plan available through a private insurer, like an HMO or PPO, to bundle the same level of coverage provided by Original Medicare — often with additional coverage for things like dental and vision. These plans feature low monthly premiums, but rely on local doctor networks, copays, and prior authorizations. Medicare Supplement Plan G, on the other hand, is also offered by private insurers but works alongside Original Medicare, allowing you to see any provider nationwide who accepts Medicare while providing more predictable out-of-pocket medical costs.
Under a Medicare Advantage plan, you trade greater network freedom for lower fixed monthly costs. You’ll have to stay within a carrier’s local network and get referrals for specialist visits. With Plan G, you pay a higher fixed monthly premium, but once you meet your annual Medicare Part B deductible ($283 in 2026), standard Plan G covers your remaining Medicare-approved Part A and Part B medical expenses.
Comparing Plan G vs. Medicare Advantage
When evaluating Medigap Plan G vs. Medicare Advantage, here are the key areas to pay attention to.
- Doctor & network freedom: With Plan G, there are no provider networks or service area restrictions. You can visit any hospital, specialist, or primary care doctor in the country who accepts Medicare assignment without needing a primary care referral. Medicare Advantage plans restrict coverage to local or regional networks, so going out-of-network often leads to a much higher price tag.
- Prior authorizations: Plan G typically doesn’t require prior authorizations or pre-approvals for Medicare-covered treatments, although some states are piloting prior authorization for Original Medicare. Medicare Advantage carriers often require prior approval for things like hospital stays, MRIs, medical equipment, and specialist visits, which can lead to delayed or denied care.
- Out-of-pocket maximums: Standard Plan G caps your annual out-of-pocket spending at the annual Part B deductible. Medicare Advantage plans’ out-of-pocket maximum varies, but can reach $9,250 for in-network care or $13,900 for combined in- and out-of-network care in 2026.
- Prescription Drug Coverage & Additional Benefits: Most Medicare Advantage plans bundle Medicare Part D prescription drug coverage directly into your plan. They may also include additional benefits for things like dental, vision, hearing, or fitness memberships. Plan G doesn’t include drug coverage or similar additional benefits, and Medigap enrollees will need to find a standalone Medicare Part D policy to cover prescription drugs. Not enrolling in a Part D plan when first eligible can lead to lifetime Part D late enrollment penalties.
How does Plan N compare to Medicare Advantage?
Plan N provides the same network freedom as Plan G, allowing you to see any doctor nationwide who accepts Medicare assignment. Plan N also typically has lower monthly premiums, but that comes with the trade-off of having to pay additional expenses like Plan B excess charges.
For those who want the freedom to choose their doctors without the higher fixed price tag of Plan G, Plan N provides a good middle ground. It avoids Medicare Advantage’s restrictive provider networks and additional prior authorization, while also keeping your set monthly expenses lower.
Comparing Plan N vs. Medicare Advantage
Plan N and Medicare Advantage compare in much the same way that Plan G and Medicare Advantage do. Here are a few key coverage considerations to keep in mind.
- Doctor & ER copays: After paying the annual Part B deductible, Plan N covers 100% of remaining Part B coinsurance, minus small copays of up to $20 for certain doctor visits and up to $50 for emergency room visits. If you end up getting admitted to the hospital, however, the ER copay is waived. Medicare Advantage will likely always require copays for each visit too, and the cost can vary depending on the plan.
- Part B excess charges: Plan N doesn’t cover Part B excess charges. This type of expense happens when a healthcare provider who does not participate in Medicare’s assignment pricing bills above the Medicare-approved amount. Medicare Advantage plans don’t have traditional excess charges.
- Fewer network restrictions: Plan N lets you visit any doctor, specialist, or healthcare facility across all 50 states that accepts Original Medicare. Medicare Advantage plans use specific, local networks that tend to be more restrictive.
Medicare Plan G or Plan N: Which fits better if you’re leaving Medicare Advantage?
If you want to switch from Medicare Advantage, choosing between Medicare Supplement Plan G vs. Plan N comes down to two main factors:
- Your tolerance for budget unpredictability.
- Your frequency of doctor/ER visits.
Plan G is a good choice if you want more cost predictability. Plan N can be ideal if you like the lower premiums of Medicare Advantage, but want more network access and fewer care requirements. While Plan N’s premiums are usually lower than Plan G’s, you’ll take on those extra out-of-pocket responsibilities mentioned above.
If you don’t visit the doctor or ER regularly, the lower monthly premium of Plan N can translate into more annual savings compared to Plan G. If you see specialists often, however, or don’t want to deal with copays and excess charges, paying Plan G’s higher premium may make more sense.
For a side-by-side look at how these Medigap policies compare, take a look at our in-depth guide: Plan G vs. Plan N: Which Medigap Option Is Right for You?.
How Can I Switch From Medicare Advantage to a Medicare Supplement Plan?
Timing and health qualifications play major roles in when you’re eligible to make changes to your coverage. Here’s a quick overview of how you can switch from Medicare Advantage to Medicare Supplement.
Step 1: Confirm your enrollment options
You generally can only disenroll from a Medicare Advantage plan during specific Medicare enrollment windows. The most common opportunities are:
- The Annual Enrollment Period (AEP) from October 15 to December 7.
- The Medicare Advantage Open Enrollment Period (MA OEP) from January 1 to March 31.
- Special Enrollment Periods (SEPs), like moving out of your plan’s service area, losing employer coverage, or your plan being discontinued.
Additionally, if you joined Medicare Advantage when you were first eligible for Medicare Part B or dropped a Medigap policy to try Medicare Advantage for the first time, you have a 12-month “trial right” period. This gives you a guaranteed right to switch back to a Medigap policy without health questions.
Step 2: Apply for your Medicare Supplement policy
Unless you qualify for guaranteed issue rights (or live in a state with continuous open enrollment or a birthday rule), you will likely need to go through medical underwriting. During this period, an insurance carrier will review your health history and medical conditions before approving your application.
Remember: Don’t cancel your Medicare Advantage plan until you have been officially approved for your new coverage.
Step 3: Select a standalone Medicare Part D drug plan
Since Medigap plans don’t include prescription drug coverage, you’ll need to select a standalone Medicare Part D plan. Enrolling in a Part D drug plan will automatically trigger Medicare to disenroll you from your Medicare Advantage plan and return you to Original Medicare. Make sure your start dates line up, so your new policy and Part D coverage all take effect at the same time and avoid any gaps in coverage.
For a deeper dive into timing and underwriting rules, head to our step-by-step guide: How to Switch From Medicare Advantage to a Medicare Supplement Plan.
Checklist: What to consider before you switch to Medicare Plan G or Plan N from Medicare Advantage
Because the process can require careful timing and medical underwriting, it’s important to make sure switching Medicare plans is right for you. Here are a few questions to keep in mind before you make any moves:
- What is your current health status? Would you pass medical underwriting, or do you qualify for guaranteed issue rights?
- Are you switching during AEP or MA OEP? Have you experienced a qualifying life event?
- How often do you travel or see specialists outside your local area?
- Are you willing to pay a higher fixed monthly premium in exchange for low out-of-pocket medical bills?
- Do you currently rely on Medicare Advantage benefits like dental, vision, or hearing?
- How much would your current prescription medications cost under a standalone Part D plan vs. your current Advantage plan?
How to evaluate your answers
- If you want to see any specialist nationwide without network limits, you dislike pre-approvals, and you’re willing to pay a higher fixed monthly premium to avoid copays for doctor visits or hospital stays, then Plan G is likely a good fit.
- If you want lower fixed costs than Plan G, you don’t mind paying up to $20 for office visits, but you don’t want to deal with doctor networks or referral rules, then Plan N is likely a good fit.
- If you’re in good health, prefer keeping your monthly premium as low as possible, want bundled perks like dental or vision, and don’t mind using local network doctors, then sticking with a Medicare Advantage plan may be a wise option.
Choosing between Medicare Advantage and a Medigap plan like Plan G or Plan N isn’t about finding the “best” plan — it’s about finding what fits your health needs, lifestyle, and budget. If you’re ready to explore your options or need help navigating enrollment, our licensed agents at United Medicare Advisors are here to help.
