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Medicare Supplement Plan G: Coverage & Costs

Medicare Supplement Plan G is popular because it fills nearly all of Original Medicare’s cost gaps while preserving your freedom to see any provider that accepts Medicare.

It’s not the mythical “Medicare plan that covers everything,” but among standardized Medigap options, Plan G gets very close—covering most hospital and outpatient cost-sharing so your healthcare budgeting stays predictable.

What Medicare Plan G Actually Covers (and What It Doesn’t)

Plan G is a standardized Medigap policy that pays after Medicare approves and pays its share. In plain English, it mops up nearly all of the out-of-pocket costs left by Parts A and B—so long as the service is Medicare-approved and medically necessary.

Core Plan G benefits include:

  • Part A hospital coinsurance plus up to 365 extra days after Medicare benefits are used up
  • Part A deductible (a significant expense many people face during inpatient stays)
  • Skilled nursing facility coinsurance
  • Part B coinsurance/copayments for doctor visits, outpatient surgery, PT/OT, DME, etc.
  • Part B excess charges (where allowed), protecting you if a non-participating provider bills up to 15% more than Medicare’s rate
  • First three pints of blood and Part A hospice coinsurance/copayments
  • Foreign travel emergency (up to plan limits)

What Plan G doesn’t cover: the Part B deductible (you pay this once per year before Plan G starts picking up Part B cost-sharing), routine prescription drugs (Part D), dental, vision, hearing routine care or devices, and long-term custodial care.

It also won’t cover services Medicare itself doesn’t approve, so experimental or non-medically necessary services remain out-of-pocket.

Because Plan G has no network, you can see any provider nationwide who accepts Medicare. Many members never see a bill beyond the annual Part B deductible, especially if their providers accept Medicare assignment and don’t bill excess charges (note that some states prohibit excess charges entirely).

Plan G vs. Other Medicare Choices

Plan G vs. Plan N (including Humana Plan N)

Plan N typically has a lower monthly premium than Plan G but comes with small doctor and ER copays and does not cover Part B excess charges. If you live in a state that bans excess charges and you don’t mind modest copays, Plan N—whether from Humana Plan N or another carrier—can be a budget-friendly alternative. If you want the broadest protection from outpatient surprises, Plan G is the safer pick.

Plan G vs. Medicare Advantage (e.g., Humana Gold Plus)

Medigap Plan G pairs with Original Medicare and offers nationwide access without prior authorization hoops for most services. Medicare Advantage plans—such as Humana Gold Plus HMO—often have lower premiums (sometimes $0) and can include extras like embedded drug coverage, dental, or vision. But they use networks and have managed-care rules. Coverage is local: you’ll want to confirm that your doctors participate, what your out-of-pocket maximum is, and whether referrals are required.

As carriers roll out Humana Advantage Plans 2026, expect tweaks to networks, benefits, and drug formularies. If you value nationwide flexibility and predictable medical bills, Plan G tends to win; if you prioritize lower premiums and bundled extras, a Medicare Advantage plan may fit better.

Is Plan G the “Medicare Plan that Covers Everything”?

No plan covers everything. Plan G is the closest among Medigap options because it pays nearly all inpatient and outpatient cost-sharing after you meet the Part B deductible. For routine drugs, dental, vision, and hearing, you’ll need separate coverage. If you’re searching for a “Medicare Plan that Covers Everything,” think of Plan G plus a strong Part D plan and optional ancillary policies for dental/vision/hearing.

Pros and Cons of Medicare Plan G

Pros

  • Excellent coverage predictability: After the Part B deductible, most Medicare-approved services have little to no additional cost.
  • See any Medicare provider nationwide: No networks, referrals, or plan authorizations for most care.
  • Covers Part B excess charges: Extra protection if you see non-participating providers (subject to state rules).
  • Standardized benefits: Plan G is identical from insurer to insurer, making apples-to-apples price comparisons easy.
  • Stable alternative to Plan F: With Plan F closed to those new to Medicare, Plan G is the most comprehensive Medigap widely available.
  • High-deductible option available: Consider High-Deductible G for a much lower premium in exchange for a higher annual deductible.

Cons

  • Monthly premium: You pay a premium for predictability, in addition to your Part B (and Part D) premiums.
  • No routine extras: Unlike many Medicare Advantage plans, Medigap doesn’t include dental, vision, hearing, or gym benefits.
  • Separate drug coverage: You’ll likely need a Part D plan for prescriptions.
  • Underwriting outside protected windows: After your six-month Medigap Open Enrollment or certain Guaranteed Issue events, switching may require health questions and approval.
  • Doesn’t cap total out-of-pocket for non-Medicare-covered services: If something isn’t covered by Medicare, Plan G won’t pay either.

How Much Does Plan G Cost?

Medicare Plan G Cost varies by state, age, gender, tobacco status, and how insurers rate policies (attained-age, issue-age, or community-rated). In many areas, a 65-year-old may see premiums roughly from $110–$190/month, while a 75-year-old might see $150–$260/month or more. High-Deductible Plan G often runs $35–$70/month but carries a large annual deductible (indexed each year; it was $2,800 in 2024). Your exact price will depend on your ZIP code and carrier.

Because benefits are standardized, focus on price, company stability, and service. A Humana Medicare Supplement Plan G provides the same medical coverage as Plan G from any other A-rated carrier—the differences are premium, discounts, and customer experience. Compare at least three carriers before deciding.

Costs and Availability by State

Rates and rules can differ considerably by location, so it helps to research Medicare Supplement Plans by State. If you’re evaluating Medicare Supplement Plans in [state], check whether your state:

  • Prohibits Part B excess charges (making Plan N more attractive)
  • Offers state-specific protections for switching Medigap plans
  • Has community rating (premiums don’t rise with age) versus attained-age rating

Looking for the Best Medicare Supplement Plans in [state] or the Top 5 Medicare Supplement Plans Near Me? Start with unbiased quote tools, verify carrier financial ratings, and read recent customer service reviews. Then, confirm that your preferred doctors accept Medicare and that your Part D plan covers your prescriptions.

Eligibility, Enrollment, and Special Situations

When to enroll

Your six-month Medigap Open Enrollment window starts when you’re 65 or older and enrolled in Part B. During this time, you can get Plan G without medical underwriting. After the window, you may need to answer health questions unless you qualify for a Guaranteed Issue situation (e.g., losing certain coverage).

Medicare and Medicaid

If you’re Medicare Medicaid dual-eligible (you have both), Medicaid may pay many of your Medicare costs. In that case, a Medigap policy usually isn’t necessary. Instead, ask your state Medicaid office about your cost-sharing protections and whether a Special Needs Plan (D-SNP) might be a better fit.

Switching later

You can apply to switch Medigap carriers or plans any time of year, but acceptance may require underwriting in many states. Some states offer “birthday rules” or other switch protections—another reason to review Medicare Supplement Plans by State before making changes.

How to Shop Smart for Plan G

  • List your doctors and hospitals: With Plan G, provider access is broad, but confirm they accept Medicare to avoid surprises.
  • Map your medications: Pair Plan G with a Part D plan that covers your specific drugs affordably.
  • Compare 3–5 carriers: Include a Humana Medicare Supplement quote alongside other A-rated companies.
  • Check pricing method: Ask whether policies are community-rated, issue-age, or attained-age and how that affects long-term costs.
  • Evaluate High-Deductible G: If you prefer a lower premium and can handle a larger deductible, HD-G may fit your budget.
  • Review state rules: For Medicare Supplement Plans in [state], confirm any switching rights or excess-charge bans that could influence whether Plan G or Humana Plan N is best.

Bottom Line

If you want broad, predictable coverage on Original Medicare, Plan G is the workhorse Medigap option—often the closest thing to a Medicare Plan that Covers Everything for hospital and outpatient costs. Match it with a Part D plan and optional dental/vision/hearing coverage, compare premiums across carriers like a Humana Medicare Supplement and others, and weigh it against local Medicare Advantage choices such as Humana Gold Plus. With the right setup, you’ll enjoy nationwide access to care and confidence in your out-of-pocket costs year after year.