Medicare Supplement Plan G: Coverage, Costs & Fit

CSG Insurance Pros helps Arizona residents decide whether a Medicare Supplement Plan G fits their budget and care preferences. Plan G pairs with Original Medicare to pay most Medicare-approved cost sharing after you meet the annual Part B deductible, while you continue paying a monthly premium and choose separate Part D drug coverage.

Table of contents

• What is Medicare Supplement Plan G?
• What does Medicare Supplement Plan G cover—and what remains your responsibility?
• How much does Medicare Supplement Plan G cost in Arizona?
• When is Medicare Supplement Plan G the right fit?
• How does Medicare Supplement Plan G compare with Plan N and Medicare Advantage?
• How should Arizona residents compare Plan G policies before enrolling?
• Frequently asked questions

What is Medicare Supplement Plan G?

Medicare Supplement Plan G is a standardized private insurance policy that works alongside Original Medicare Parts A and B to pay specified gaps left after Medicare pays its share.

“Medigap” is the common name for Medicare Supplement insurance. In Arizona, standardized means every Plan G policy must provide the same core medical benefits, regardless of the insurer selling it. The premium, rate history, enrollment rules, customer service, and optional household discounts can differ. The Plan G medical benefit itself does not.

Here is how claims generally work: a provider bills Original Medicare first; Medicare pays its approved share; then Plan G pays the eligible remaining amount covered by the policy. You retain responsibility for the annual Part B deductible and for care that Medicare or Plan G does not cover.

You must be enrolled in both Medicare Part A and Part B to buy a Medigap policy. You also cannot use a Medicare Supplement policy while enrolled in a Medicare Advantage plan. Plan G does not include outpatient prescription coverage, so many people pair it with a standalone Part D plan.

For a closer look at availability and enrollment choices, see CSG Insurance Pros’ guide to Arizona Medicare Supplement plans.

What does Medicare Supplement Plan G cover—and what remains your responsibility?

Plan G covers nearly all Medicare-approved Part A and Part B cost sharing except the annual Part B deductible, but it does not turn non-Medicare services into covered benefits.

After you satisfy the Part B deductible for the calendar year, standard Plan G benefits include:

• Part A hospital coinsurance and hospital costs for up to an additional 365 days after Medicare benefits end.
• The Part A hospital deductible.
• Part B coinsurance or copayments for Medicare-approved outpatient services.
• The first three pints of blood each year, if needed.
• Part A hospice coinsurance or copayments.
• Skilled nursing facility care coinsurance.
• Part B excess charges, where they are permitted.
• Foreign travel emergency care at 80% of eligible costs, subject to the policy’s limits and conditions.

A Medicare-approved amount is the amount Original Medicare recognizes for a covered service. Plan G’s protection is built around that amount. If a physician accepts Medicare assignment, the provider accepts the Medicare-approved amount as payment in full. If a provider does not accept assignment, a permitted excess charge may apply. Plan G covers eligible Part B excess charges, which is one meaningful difference between Plan G and Plan N.

Plan G does not cover the annual Part B deductible. It also does not cover most routine dental care, routine vision care, hearing aids, retail prescription drugs, long-term custodial care, or private-duty nursing. A Medigap policy also does not pay your Part B premium or your separate Part D premium.

That distinction matters. Plan G can make your share of covered medical bills highly predictable after the Part B deductible, but you still need a budget for premiums, prescriptions, dental and vision needs, and services outside Medicare’s benefit rules.

How much does Medicare Supplement Plan G cost in Arizona?

Your Medicare Supplement Plan G cost is the sum of its monthly premium, the annual Part B deductible, and any expenses for services or drugs that Medicare and Plan G exclude.

There is no single Arizona price for Plan G. Quotes vary by ZIP code, age, tobacco status, household discounts where offered, the insurer’s rating method, and the timing of your application. Men and women may also receive different rates. A low first-year premium is worth considering, but it is not the whole decision.

Ask how the policy is rated:

• Community-rated: Everyone in the same policy group generally pays the same base rate, regardless of age. Premiums can still rise because of inflation, medical claims, or other plan-wide factors.
• Issue-age-rated: Your starting premium is based on your age when you buy the policy. It does not rise solely because you age, though other rate increases may occur.
• Attained-age-rated: The premium is based in part on your current age, so it may rise as you get older in addition to plan-wide adjustments.

No agent can responsibly promise that a Plan G premium will never increase. Annual changes are not universal and cannot be assumed from another person’s experience, even if you have the same letter plan. Review the rate basis, available discounts, and current premium—not just the carrier name or an advertised starting price. For a useful comparison, line up quotes using the same ZIP code, effective date, and benefit type before judging premiums.

A high-deductible Plan G may also be available. It provides the same standardized benefit structure only after you satisfy a much larger annual deductible set for that plan type. It can reduce the monthly premium, but it shifts more early-year cost to you. High-deductible Plan G can fit someone who wants catastrophe protection and can comfortably absorb the deductible from savings. It is usually a poor fit if a large unexpected outpatient bill would disrupt your finances.

!Illustration for How much does Medicare Supplement Plan G cost in Arizona?

When is Medicare Supplement Plan G the right fit?

Medicare Supplement Plan G is often a strong fit if you value broad provider access under Original Medicare and want fewer medical bills after the Part B deductible.

Plan G does not use a provider network in the way many managed-care plans do. You can generally see any U.S. provider that accepts Medicare, without referrals required by the supplement. That can be especially useful for Arizona residents who spend part of the year elsewhere, see specialists in another area, or simply prefer the flexibility to choose Medicare-participating providers.

The best time to buy is usually your six-month Medigap open enrollment period. It starts when you are at least 65 and enrolled in Part B. During that period, you can generally buy a Medigap policy without medical underwriting. Medical underwriting is the insurer’s review of health information to decide whether to accept an application and what premium to offer.

Outside that window, you may face underwriting unless you qualify for a guaranteed-issue right. Guaranteed-issue rights can arise after certain coverage losses or plan changes. Timing matters because changing later is not always as simple as finding a lower quote.

Plan G deserves a closer look if you:

• Want predictable cost sharing for Medicare-approved care after the Part B deductible.
• Prefer Original Medicare’s broad access to Medicare-participating providers.
• Travel frequently or live seasonally in Arizona and another state.
• Can afford a recurring premium and separate Part D coverage.
• Want protection from eligible Part B excess charges.

It may be less suitable if your main priority is the lowest monthly premium, you are comfortable with copays and networks, or you want a plan that commonly combines medical and drug coverage. Review the full range of Arizona Medicare plan types before choosing a path.

How does Medicare Supplement Plan G compare with Plan N and Medicare Advantage?

Plan G generally trades a higher monthly premium for lower point-of-care costs, while Plan N and Medicare Advantage ask you to accept more cost sharing, provider rules, or both.

| Option | What you pay as you receive Medicare-covered care | Provider access and rules | Prescription drug coverage | Best decision criteria | |---|---|---|---|---| | Plan G with Original Medicare | Annual Part B deductible, then Plan G pays covered Part A and Part B gaps; you still pay noncovered services | Broad access to providers that accept Medicare; no supplement network | Buy a separate Part D plan | You prioritize predictability, flexibility, and protection from excess charges | | Plan N with Original Medicare | Annual Part B deductible plus certain office and emergency room copays; it does not cover Part B excess charges | Broad Medicare provider access, but confirm assignment practices | Buy a separate Part D plan | You want a lower premium and are comfortable paying some copays and checking providers | | Medicare Advantage | Copays, coinsurance, and deductibles vary by plan; an annual in-network out-of-pocket maximum applies to covered Part A and B services | Usually uses a service area, provider network, and plan rules | Often includes Part D coverage, but verify the specific plan | You want integrated benefits and accept plan-specific networks and cost-sharing rules |

Plan N can be an effective value choice, but do not compare premiums alone. Factor in likely office visits, emergency care, whether your doctors accept assignment, and your comfort with paying copays. A lower premium can be worthwhile for a healthy person who prefers to retain more monthly cash flow. Plan G can be worth more for someone who wants the simplest possible experience with Medicare-approved cost sharing.

Medicare Advantage is not a supplement to Original Medicare. It is another way to receive Medicare benefits through a private plan. You cannot keep Medigap coverage as a way to fill Medicare Advantage copays. Read CSG Insurance Pros’ detailed Medicare Advantage versus Medigap comparison if you are weighing those two paths.

How should Arizona residents compare Plan G policies before enrolling?

Compare identical Plan G benefits on total value: current premium, rating method, discount eligibility, underwriting rules, and the financial impact of future rate changes.

Start by confirming that Plan G is the right benefit level. Then compare quotes for the same effective date and ZIP code. Ask whether the quoted premium includes a household discount, whether the discount can change, and how the insurer sets future rates. If you are replacing an existing Medigap policy, do not cancel the current coverage until the new policy is approved and you have confirmed the effective date.

Also check your drug coverage separately. A strong Plan G choice can still be undermined by a Part D plan that does not fit your prescriptions or preferred pharmacy. Your medication list, dosage, and pharmacy choice should drive that review.

CSG Insurance Pros offers free, personalized help from licensed Arizona agents. Contact CSG Insurance Pros to compare Plan G, Plan N, and Medicare Advantage choices based on your doctors, prescriptions, travel habits, and budget. CSG Insurance Pros — 2151 E Baseline Rd Ste 101, Tempe, AZ 85283 — (928) 263-8500.

Frequently asked questions

These answers address the Plan G questions Arizona residents most often ask before they enroll.

Is Medigap the same as Medicare Supplement insurance?

Yes. Medigap is the common name for Medicare Supplement insurance: a private policy that helps pay eligible deductibles, coinsurance, and copayments left by Original Medicare.

How much does Medicare Plan G cost per month?

Medicare Plan G monthly premiums vary by Arizona ZIP code, age, tobacco use, rating method, household discounts, and insurer, so there is no single monthly price that applies to everyone. You should also budget for the annual Part B deductible and a separate Part D premium if you want prescription drug coverage.

What is the 2026 rate increase for a specific Plan G insurer?

There is no universal 2026 Plan G rate increase because premiums are set by each insurer and can vary by policy block, location, rating method, and available discounts. Review your renewal notice and compare the new premium with current alternatives before making a coverage change.

What is the best Medigap plan?

The best Medigap plan is the one whose benefits, premium, provider flexibility, and likely out-of-pocket costs match your needs. Plan G is often preferred for broad coverage after the Part B deductible, while Plan N can suit someone willing to pay some copays for a lower premium.

What is the Medicare Supplement Plan G deductible for 2026?

Standard Plan G does not pay the annual Medicare Part B deductible, so you pay that amount before Plan G begins paying eligible Part B cost sharing. High-deductible Plan G has a separate, substantially larger annual deductible that changes periodically; confirm the current amount before enrolling.

Can I keep my own doctors with Plan G?

Plan G works with Original Medicare, so you can generally use any provider nationwide that accepts Medicare. Before scheduling care, confirm that the provider accepts Medicare and ask whether the provider accepts assignment.

Can I switch from Plan G to another Medigap plan later?

You may apply to switch later, but you may have to answer health questions and could be denied or charged more unless you have a guaranteed-issue right. Compare options carefully before giving up an existing Medigap policy.

Does Plan G include prescription drug coverage?

No. Plan G does not cover retail outpatient prescription drugs, so you normally need a separate Medicare Part D prescription drug plan if you want drug coverage.

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About the author

[Aaron C. Matheny](https://www.linkedin.com/in/aaron-matheny-673a4bb) — Owner / Agency Manager

Licensed Medicare Broker · Owner / Agency Manager

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