What Medicare Part G Covers and How It Works

Medicare Part G does not exist

There is no Part G in the Medicare program. Medicare has Part A (hospital care), Part B (doctor visits and outpatient services), Part C (Medicare Advantage, an alternative to Original Medicare), and Part D (prescription drugs). If you have seen "Part G" mentioned, it may be a typo, or someone may have been referring to a Medigap plan — which is sometimes called a "supplement" or "supplemental insurance" — using unclear language.

If you are looking for information about what your current coverage includes, the first step is to check your Medicare card or your plan documents. Your card will show which parts of Medicare you have. If you are unsure what you are enrolled in, you can call Medicare directly at 1-800-MEDICARE (1-800-633-4227) and they will tell you exactly what coverage is active on your account.

Key Takeaways

Medicare Part G does not exist; the program includes Parts A, B, C, and D only.
If you saw "Part G" in writing, it may have been a mistake or a reference to a Medigap supplemental plan using unclear language.
Your Medicare card and plan documents show which actual parts of Medicare you are enrolled in.
Calling Medicare at 1-800-MEDICARE can clarify your coverage in minutes if you are unsure what you have.

The four actual parts of Medicare

Part A covers inpatient hospital stays, skilled nursing facility care after a hospital stay, hospice care, and some home health services. Most people do not pay a monthly premium for Part A if they or their spouse paid Medicare taxes while working.

Part B covers doctor visits, outpatient care, lab tests, imaging, and medical equipment. Part B requires a monthly premium, which varies by income. Part B is optional, but if you delay signing up when you first become may be able to access, you may pay a penalty for life.

Part C, also called Medicare Advantage, is an alternative way to get Parts A and B through a private insurance company. Part C plans often include Part D (drug coverage) and may cover dental, vision, or hearing — things Original Medicare does not cover. Part C has different out-of-pocket costs and networks than Original Medicare.

Part D covers prescription drugs. It is optional but recommended; if you do not sign up when first may be able to access and go without drug coverage, you may pay a penalty when you do enroll. Part D plans vary widely in which drugs they cover and what you pay.

What Medigap (supplemental insurance) is and why it might be confused with Part G

Medigap is private supplemental insurance sold by insurance companies to fill gaps in Original Medicare coverage. It is not a part of Medicare itself. Medigap plans are labeled with letters: Plan A, Plan B, Plan C, Plan D, Plan F, Plan G, Plan K, Plan L, Plan M, and Plan N. Plan G is a real Medigap plan, and that may be where the confusion comes from.

If you have Original Medicare (Parts A and B) and you buy a Medigap Plan G, that plan covers some of the costs that Medicare does not — such as copayments, coinsurance, and deductibles. Plan G does not replace Medicare; it works alongside it. You still have Medicare Parts A and B, and you still pay Medicare premiums. Medigap Plan G is optional; many people choose it, but others choose a different Medigap plan or no supplement at all.

Medigap plans are standardized by federal law, so Plan G from one insurance company covers the same things as Plan G from another company — though the monthly premium varies. If you are considering a Medigap plan, you can compare plans and prices through your state's health insurance counselor or by contacting insurance companies directly.

How to find out what coverage you actually have

Your Medicare card shows which parts you are enrolled in. Look at the front of your card: it will say whether you have Part A, Part B, Part C, or Part D. If you have Part C, your card will show the name of your Medicare Advantage plan instead of listing Parts A and B separately.

If you also have a Medigap plan, you will have a separate insurance card from that company. The Medigap card will show which plan letter you have (A, B, C, D, F, G, K, L, M, or N) and the insurance company's name.

If you cannot find your cards or are unsure what you have, call Medicare at 1-800-MEDICARE. They can tell you in a few minutes which parts are active on your account and whether you have a Medigap plan. Have your Social Security number ready when you call.

What to do if you think you need different coverage

If your current coverage does not meet your needs, you have options depending on what you have now. If you have Original Medicare and want drug coverage, you can enroll in Part D during the annual enrollment period (October 15 to December 7 each year) or if you have a may have access to life event. If you have Original Medicare and want to cover more costs, you can buy a Medigap plan.

If you have Medicare Advantage and want to switch to Original Medicare plus a Medigap plan, you can do so during the annual enrollment period. If you have Medicare Advantage and want to change to a different Medicare Advantage plan, you can do that during the annual enrollment period as well.

Changes to your coverage usually take effect on January 1 if you enroll during the annual enrollment period. Some life events — such as losing other insurance, moving out of your plan's service area, or turning 65 — allow you to make changes outside the annual period. Call Medicare at 1-800-MEDICARE to ask whether a life event applies to you.

Questions to ask your doctor or Medicare counselor

If you are confused about your coverage or think you need something different, these questions can help you get clarity. Ask your doctor's office which parts of Medicare they accept and whether your current plan covers the services you need. Ask Medicare or your insurance company directly whether a specific drug, test, or service is covered under your plan — do not assume based on what someone else told you.

If you are considering switching plans, ask a State Health Insurance information Program (SHIP) counselor for help. SHIP counselors are free, unbiased, and trained to compare plans. You can find your state's SHIP by calling 1-800-MEDICARE or visiting the Medicare website.

Frequently Asked Questions

I saw "Part G" on a document. What should I do?

Ask whoever sent the document to clarify what they meant. They may have meant Medigap Plan G, or it may have been a typo. If it is from your insurance company, call them directly — they can tell you exactly what coverage you have in seconds.

Is Medigap Plan G the same as Medicare Part G?

No. Medigap Plan G is supplemental insurance sold by private companies. It works with Original Medicare (Parts A and B) to cover some costs Medicare does not. There is no Medicare Part G.

Do I have to have a Medigap plan?

No. Medigap is optional. Many people have Original Medicare without any supplement. Others choose Medicare Advantage instead, which is a different way to get Medicare coverage. The choice depends on your health needs, budget, and preferences.

Can I switch from Medicare Advantage to Original Medicare plus Medigap?

Yes, during the annual enrollment period (October 15 to December 7). If you switch, you may be able to buy a Medigap plan without waiting or paying extra, depending on your state's rules. Call a SHIP counselor to understand your options before you switch.

What if I missed the enrollment period and need to change my coverage?

Some life events — such as losing other insurance, moving, or a major change in health — allow you to make changes outside the annual period. Call Medicare at 1-800-MEDICARE to ask whether your situation qualifies.

This guide is for general information only and is not medical, financial, legal, or other professional advice. For decisions specific to your situation, consult a qualified professional. See our Editorial Policy.