Medicare Advantage vs. Supplement: How to Choose

Medicare choices can look similar on a comparison sheet while working very differently when you use care. Start with your doctors, prescriptions, travel habits, and budget before comparing individual plans.

Understand the two approaches

Medicare Advantage

Medicare Advantage is an alternative way to receive your Medicare Part A and Part B benefits through a Medicare-approved private plan. Most plans also include Part D prescription drug coverage, and some offer benefits such as dental, vision, or hearing coverage.

Provider networks, referrals, prior authorization, and cost sharing vary by plan. For non-emergency care, you may need to use providers in the plan's network and service area. Check the details for the doctors and services you use.

You still pay your Part B premium and may also pay a plan premium. A $0 plan premium does not mean all your care is free. Advantage plans have a yearly out-of-pocket limit for covered Part A and Part B services, so compare that limit alongside deductibles and copayments.

Original Medicare with a Supplement

Medicare Supplement insurance, also called Medigap, works alongside Original Medicare to help pay certain out-of-pocket costs, such as copayments, coinsurance, and deductibles. You need Part A and Part B to buy a Medigap policy. Medigap is different from Medicare Advantage and cannot be used to pay an Advantage plan's out-of-pocket costs.

Original Medicare lets you use any doctor or hospital that accepts Medicare anywhere in the U.S. Some Medigap policies called Medicare SELECT use provider networks, so check the policy before choosing it.

Original Medicare has no yearly out-of-pocket limit without supplemental coverage. Medigap policies help with specified costs but do not cover every expense. You pay a separate Medigap premium in addition to your Part B premium.

Medigap policies sold today do not include prescription drug coverage. If you need drug coverage, compare a separate Part D plan unless you already have other creditable drug coverage.

Compare your actual care needs

• Confirm how your preferred doctors and hospitals participate. A provider accepting Medicare does not necessarily participate in an Advantage network.
• Review your medications, drug tiers, and the pharmacies you use. Check the individual Part D or Advantage plan's covered-drug list.
• Compare all premiums alongside deductibles, copayments, and likely out-of-pocket costs.
• Consider travel. Original Medicare generally does not cover care outside the U.S.; some Medigap policies and Advantage plans include limited foreign travel emergency benefits.

A low premium is one part of the decision. How a plan works when you need care is just as important.

Pay attention to timing

Medicare enrollment windows and Medigap enrollment rights are different. The federal Medigap Open Enrollment Period lasts six months, starting the first month you are 65 or older and enrolled in Part B. During that period, an insurer cannot deny you a Medigap policy because of pre-existing health problems.

That window does not repeat each year. Outside it, you may have fewer options or pay more unless a guaranteed issue right or state protection applies. Before leaving an Advantage plan, confirm whether you can obtain the Medigap coverage you want and when each policy would take effect.

Official sources and next steps

This guide was reviewed against Medicare.gov on September 30, 2026:

• Compare Original Medicare and Medicare Advantage
• Get Medigap basics
• Learn what Medigap covers
• When can I buy a Medigap policy?

You can explore our Medicare services for help comparing your needs, or use Medicare's plan comparison tool to review available plans. The right choice depends on your health needs, budget, location, and enrollment rights.