Medicare Coverage Options Explained in Plain Language

Where to start

Most people begin with Original Medicare, which is the federal program made up of Part A and Part B. From there, you generally choose one of two directions: stay with Original Medicare and add coverage to it, or receive your Medicare benefits through a private Medicare Advantage plan.

Neither direction is automatically better. They are structured differently, and the trade-offs show up in how you pay, which providers you can use, and how prescription coverage is handled.

Original Medicare (Part A and Part B)

Original Medicare is administered by the federal government. Part A generally helps cover inpatient hospital care, skilled nursing facility care, some home health care, and hospice care. Part B generally helps cover doctor visits, outpatient care, preventive services, lab work, and durable medical equipment.

Original Medicare lets you use any provider in the United States who accepts Medicare, without a network. It does not include prescription drug coverage on its own, and it has no annual limit on what you may pay out of pocket. Those two gaps are the reason most people add additional coverage.

Medicare Advantage (Part C)

Medicare Advantage plans are offered by private insurance companies approved by Medicare. When you enroll, you still have Medicare, but the plan administers your Part A and Part B benefits and may add extras such as prescription drug coverage or routine dental, vision, and hearing benefits.

These plans typically use provider networks, may require referrals depending on the plan type, and set an annual maximum out-of-pocket limit for covered medical services. Benefits, costs, and availability vary by plan and by county.

Benefits vary by plan and location. Not every plan includes every additional benefit, and benefits can change each plan year.

Medicare Supplement (Medigap)

Medicare Supplement insurance works alongside Original Medicare. Instead of replacing your Part A and Part B benefits, a Medigap policy helps pay some of the costs Original Medicare leaves to you, such as coinsurance and, depending on the plan letter, deductibles.

Medigap policies are standardized by plan letter, so the benefits within a given letter are the same from one insurance company to the next, though premiums and availability differ. Medigap policies do not include prescription drug coverage, so people who choose this route usually add a standalone Part D plan.

Medicare Part D prescription drug coverage

Part D helps pay for prescription medications. You can get it through a standalone Part D plan that pairs with Original Medicare or a Medigap policy, or through a Medicare Advantage plan that includes drug coverage.

Every Part D plan publishes a formulary — the list of drugs it covers and the cost tier for each one. Because formularies and pharmacy networks change from year to year, comparing your specific medication list matters more than comparing premiums alone.

Additional benefits some plans offer

Some Medicare Advantage plans include benefits that Original Medicare generally does not cover, such as routine dental, vision, or hearing services, fitness memberships, transportation to medical appointments, or over-the-counter allowances.

These are plan-specific. Eligibility rules, allowance amounts, and permitted uses vary, and a benefit advertised in one county may not exist in another.

• No benefit is included in every plan.
• Availability varies by plan and by location.
• Eligibility rules may apply to certain benefits.
• Allowance amounts and permitted uses vary.
• Benefits may change each plan year.

Savings and assistance programs

If Medicare costs are difficult to manage, there are government programs that may help with premiums, deductibles, cost sharing, or prescription costs. These include Medicare Savings Programs administered through state Medicaid agencies and the Extra Help program for Part D.

Insurance Allies does not determine eligibility for any government program, but a licensed agent can point you toward the right agency to apply.

What people usually weigh

• Whether your current doctors and hospitals participate in a plan's network
• How your specific prescriptions are covered on each plan's formulary
• Your comfort with a predictable monthly premium versus paying more when you use care
• How often you travel or spend part of the year in another state
• Whether an annual maximum out-of-pocket limit matters to you
• Whether you may face medical underwriting for a Medicare Supplement policy in your state
• Any employer, union, or retiree coverage you already have

Timing matters

You cannot join or change most Medicare coverage at any time you like. Enrollment is tied to specific windows, including your Initial Enrollment Period around the time you first become eligible, the Annual Enrollment Period each fall, and Special Enrollment Periods triggered by qualifying life events.

Missing a window can mean waiting, and in some cases a late enrollment penalty. Our enrollment periods page explains each window and how effective dates generally work.

Important disclosures

• Insurance Allies is a private, non-government entity. It is not connected with or endorsed by the United States government, the federal Medicare program, or the Centers for Medicare & Medicaid Services (CMS).
• We do not offer every plan available in your area. Any information we provide is limited to the plans Everlive Advisors LLC represents in your area.
• To learn about all of the options available to you, contact Medicare.gov, call 1-800-MEDICARE (TTY 1-877-486-2048), 24 hours a day, 7 days a week, or contact your local State Health Insurance Assistance Program (SHIP).
• Enrollment depends on eligibility and on an applicable enrollment period. Enrollment is not guaranteed, and there is no obligation to enroll.
• The information on this page is general and educational. It is not legal, tax, medical, or financial advice.