Official Medicare Publications & Guides

Understanding Medicare Advantage Plans

Learn how Medicare Advantage Plans work, what they cover, and how they differ from Original Medicare. Understand costs, network rules, enrollment periods, and whether Part C is right for you. Compare plan types and benefits to make an informed decision.

Feb 28, 2025 · 5 min read

Credit: Medicare.gov

Who Should Read This

This publication is essential reading for anyone approaching age 65 or already enrolled in Original Medicare who wants to understand their coverage options. It's particularly valuable for people who prefer having all their Medicare coverage through one plan, those considering prescription drug coverage, and individuals who want to understand the differences between Original Medicare and Medicare Advantage. Family members and caregivers helping loved ones navigate Medicare decisions will also find this information helpful.

Quick Overview

This Medicare publication explains Medicare Advantage Plans (Part C) as an alternative way to receive Medicare benefits through private insurance companies approved by Medicare. The guide covers how these plans work, what they include, costs involved, and how to decide if a Medicare Advantage Plan is right for your situation. The original publication is 28 pages and provides comprehensive information for making an informed choice about Medicare coverage.

Key Takeaways

Medicare Advantage Plans are offered by private companies contracted with Medicare and must cover everything Original Medicare covers except hospice care
Most Medicare Advantage Plans include prescription drug coverage, and many offer extra benefits like dental, vision, and hearing services
You must continue paying your Part B premium and may have additional costs like monthly plan premiums, copayments, and coinsurance
Medicare Advantage Plans typically have network restrictions, requiring you to use specific doctors and hospitals except in emergencies
You can join a Medicare Advantage Plan during your Initial Enrollment Period, the Annual Enrollment Period (October 15-December 7), or during a Special Enrollment Period
Plans can change their costs, coverage, and provider networks each year, making it important to review your plan annually
You can switch back to Original Medicare during certain enrollment periods if a Medicare Advantage Plan no longer meets your needs

Publication Summary

Medicare Advantage Plans represent an alternative to Original Medicare, bundling hospital insurance, medical insurance, and usually prescription drug coverage into one plan offered by private insurance companies. These companies contract with Medicare and must follow Medicare's rules while providing at least the same coverage as Original Medicare Parts A and B.

Understanding what Medicare Advantage Plans cover is crucial for making an informed decision. All plans must cover medically necessary services that Original Medicare covers, including emergency and urgent care, even when traveling outside the plan's service area. However, hospice care remains covered under Original Medicare Part A even when enrolled in a Medicare Advantage Plan. Most Medicare Advantage Plans include prescription drug coverage, eliminating the need for a separate Part D plan. Many plans offer additional benefits not covered by Original Medicare, such as routine dental care, vision services, hearing aids, and fitness programs.

The cost structure of Medicare Advantage Plans differs from Original Medicare. Enrollees must continue paying the monthly Part B premium to Medicare. Additionally, plans may charge their own monthly premium, which varies by plan. Out-of-pocket costs include copayments or coinsurance for services, though all plans have a yearly limit on what members pay for services covered under Parts A and B. This maximum out-of-pocket limit provides financial protection that Original Medicare does not offer.

Medicare Advantage Plans come in several types, each with different rules about accessing care. Health Maintenance Organizations typically require using network doctors and getting referrals to see specialists. Preferred Provider Organizations offer more flexibility, allowing out-of-network care at higher costs. Private Fee-for-Service Plans determine how much they pay providers and how much members pay for services. Special Needs Plans serve specific groups, such as people with certain chronic conditions or those who qualify for both Medicare and Medicaid.

Network restrictions represent a significant consideration when evaluating Medicare Advantage Plans. Most plans require members to use doctors, hospitals, and other providers within the plan's network for non-emergency care. Going outside the network may mean paying the full cost of services. Provider networks can change from year to year, potentially affecting access to preferred doctors or specialists.

Enrollment in Medicare Advantage Plans follows specific timeframes. The Initial Enrollment Period occurs when first becoming eligible for Medicare. The Annual Enrollment Period runs from October 15 through December 7 each year, allowing people to join, switch, or drop Medicare Advantage Plans. Special Enrollment Periods provide opportunities to change plans based on specific circumstances, such as moving to a new service area or qualifying for Extra Help with prescription drug costs.

Individuals enrolled in a Medicare Advantage Plan retain the right to return to Original Medicare. During the Medicare Advantage Open Enrollment Period from January 1 through March 31, members can switch to Original Medicare and join a Part D prescription drug plan. Understanding this flexibility helps people feel more comfortable trying a Medicare Advantage Plan.

Annual plan reviews are essential because Medicare Advantage Plans can change their benefits, costs, and provider networks each year. Plans send an Annual Notice of Change before October 15, detailing any modifications for the upcoming year. Reviewing this information helps determine whether the current plan still meets healthcare needs or if switching to a different plan makes sense.

Frequently Asked Questions

Can I have both a Medicare Advantage Plan and a Medigap policy? No, it is illegal for anyone to sell you a Medigap policy if you have a Medicare Advantage Plan. If you join a Medicare Advantage Plan, your Medigap policy will no longer work to pay your share of costs. You may want to drop your Medigap policy to avoid paying premiums for coverage that provides no benefit.

What happens to my prescription drug coverage if I join a Medicare Advantage Plan? Most Medicare Advantage Plans include prescription drug coverage. If you join a Medicare Advantage Plan that includes drug coverage, you cannot have a separate Part D prescription drug plan. If you join a Medicare Advantage Plan without drug coverage, you can join a separate Part D plan.

Do I still need to pay my Part B premium if I have a Medicare Advantage Plan? Yes, you must continue paying your monthly Part B premium to Medicare even when enrolled in a Medicare Advantage Plan. You may also need to pay a monthly premium to the Medicare Advantage Plan, depending on which plan you choose.

Can I see any doctor I want with a Medicare Advantage Plan? Most Medicare Advantage Plans have network restrictions. HMO plans typically require you to use network doctors and get referrals for specialists. PPO plans allow you to see out-of-network providers but at a higher cost. Emergency and urgent care is covered even outside the network.

When can I switch from a Medicare Advantage Plan back to Original Medicare? You can switch to Original Medicare during the Medicare Advantage Open Enrollment Period (January 1-March 31), the Annual Enrollment Period (October 15-December 7), or if you qualify for a Special Enrollment Period. When switching back, you may want to purchase a Medigap policy, but you may not have guaranteed issue rights.