Medicare Part C combines your hospital, medical, and prescription drug coverage into one plan

Medicare Part C, also called Medicare Advantage, is an alternative way to get your Medicare benefits. Instead of using Original Medicare (Part A and Part B) and buying a separate prescription drug plan, you enroll in a single private insurance plan that covers hospital care, doctor visits, and prescription drugs all together. The plan is run by a private insurance company that contracts with Medicare.

When you join a Part C plan, you are still in Medicare — you have not left the program. But you are getting your benefits through a private insurer rather than directly from the government. This means the rules, costs, and networks of doctors and hospitals work differently than Original Medicare.

Part C plans are optional. You can stay on Original Medicare instead, or you can switch between Part C and Original Medicare during the yearly enrollment periods. The choice depends on your health needs, where you live, and what doctors you want to see.

Key Takeaways

  • Part C plans are sold by private insurance companies and include hospital care, doctor visits, and prescription drugs in one plan.
  • You must have Medicare Part A and Part B to enroll in Part C, and you cannot use Original Medicare at the same time.
  • Part C plans have networks of doctors and hospitals you must use, and costs vary by plan and by how much care you need.
  • You can change to or from a Part C plan during the annual Medicare enrollment period, which runs from October 15 to December 7 each year.
  • Part C plans often include extra benefits that Original Medicare does not cover, such as dental, vision, or fitness programs.

How Part C differs from Original Medicare

Original Medicare is a fee-for-service program run by the federal government. You can see any doctor or hospital that accepts Medicare, and Medicare pays the provider directly. You pay a deductible and coinsurance for each service. If you want prescription drug coverage, you buy a separate Part D plan.

Part C works differently. You choose one plan from the options available in your area, and that plan becomes your single point of coverage. The plan has a network of doctors, hospitals, and pharmacies. If you go to a provider outside the network, you usually pay more or the plan may not cover it at all. The plan handles all your claims and coordinates your care.

Part C plans often charge lower monthly premiums than Original Medicare plus a separate drug plan. However, you may have higher out-of-pocket costs when you use care, depending on the plan. Some Part C plans include benefits that Original Medicare does not — such as dental cleanings, eyeglasses, or gym memberships — but not all plans offer these.

Types of Part C plans and how they limit your choices

The most common type of Part C plan is a Health Maintenance Organization (HMO). With an HMO, you must use doctors and hospitals in the plan's network. You choose a primary care doctor who coordinates your care and gives referrals to specialists. If you go out of network, the plan usually does not pay, except in emergencies.

A Preferred Provider Organization (PPO) plan gives you more flexibility. You can see any doctor or hospital, but you pay less if you use providers in the plan's network. You do not need a referral to see a specialist. PPO plans usually have higher premiums than HMOs but lower out-of-pocket costs when you need care.

Private Fee-for-Service (PFFS) plans let you see any doctor or hospital that accepts the plan's payment terms, without a network restriction. These plans are less common and may not be available in all areas.

Some Part C plans are also Special Needs Plans (SNPs), designed for people with specific conditions like diabetes or heart disease, or for people who live in certain institutions. These plans tailor their benefits and care coordination to that population.

Costs you will pay with Part C

Part C plans have different cost structures than Original Medicare. You still pay your Part B premium to Medicare each month. On top of that, most Part C plans charge a monthly premium, though some plans have zero premium. The premium varies by plan and by where you live.

When you use care, you pay copayments or coinsurance. For example, you might pay $25 to see your primary care doctor, $50 to see a specialist, or $250 for a hospital stay. These amounts vary widely by plan. Some plans have an annual out-of-pocket maximum — a limit on how much you pay in a year. Once you reach that limit, the plan pays for the rest of your covered care.

Prescription drugs are included in your Part C plan, so you do not buy a separate Part D plan. You pay a copayment for each prescription, and the amount depends on the plan's drug formulary — the list of drugs it covers.

When you can enroll in or switch Part C plans

You can enroll in Part C when you first become may be able to access for Medicare. If you are already on Original Medicare, you can switch to a Part C plan during the Annual Enrollment Period (AEP), which runs from October 15 to December 7 each year. Changes take effect on January 1.

If you are new to Medicare, you have a seven-month window called your Initial Enrollment Period (IEP) to join a Part C plan without penalty. This period starts three months before the month you turn 65 and ends three months after.

You can also switch plans if you have a may have access to life event, such as moving out of your plan's service area, losing other health coverage, or becoming may be able to access for Medicaid. You have 60 days from the event to make a change.

What to ask your doctor before choosing Part C

Before you enroll in a Part C plan, check whether your current doctors are in the plan's network. Call your doctor's office and ask if they accept the specific plan you are considering. Ask whether they are taking new patients and whether they will be in the network next year.

If you take prescription medications, check the plan's drug formulary to see whether your drugs are covered and at what cost. You can find formularies on the Medicare website or by calling the plan directly.

Ask your doctor whether you will need specialist care in the coming year. If you do, find out whether you need a referral and whether the specialists you need are in the plan's network.

When to seek help comparing plans

Comparing Part C plans can be complex. If you are unsure which plan is right for you, contact your State Health Insurance information Program (SHIP). SHIP counselors are free and unbiased, and they can walk you through the plans available in your area. You can find your local SHIP by calling 1-800-MEDICARE or visiting Medicare.gov.

You can also use the Medicare Plan Finder tool on Medicare.gov. Enter your zip code, doctors, and medications, and the tool will show you plans available in your area and estimate your costs.

If you have questions about a specific plan, call the plan directly. The phone number is on the plan's materials and on Medicare.gov. Ask about coverage, costs, and how to file a claim.

Frequently Asked Questions

Do I have to choose a Part C plan when I turn 65?

No. Part C is optional. You can stay on Original Medicare instead. However, if you do not enroll in Part C or Original Medicare when you first become may be able to access, you may pay a late enrollment penalty for as long as you have Medicare.

Can I use my current doctors with a Part C plan?

It depends on the plan. Call your doctor's office and ask whether they accept the specific Part C plan you are considering. Some doctors are in some plans but not others, and networks change from year to year.

What happens if I need care outside my plan's network?

With an HMO plan, the plan usually does not pay for out-of-network care except in emergencies. With a PPO plan, you can see any doctor, but you pay more if they are out of network. Check your plan documents to understand what is and is not covered.

Can I switch back to Original Medicare if I do not like my Part C plan?

Yes. You can switch during the Annual Enrollment Period (October 15 to December 7) or if you have a may have access to life event. If you switch back to Original Medicare, you will need to enroll in a separate Part D prescription drug plan.

Are prescription drugs covered under Part C?

Yes. All Part C plans include prescription drug coverage. You do not buy a separate Part D plan. You pay a copayment for each prescription based on the plan's formulary.