Zero-Premium Medicare Advantage Plans: The Hidden Costs You Need to Know

How Can a Health Plan Cost $0 a Month?

It helps to understand the basic mechanics of Medicare Advantage. When you join a Medicare Advantage plan, the federal government pays the private insurance company a set amount per member to cover your Part A and Part B benefits. This is sometimes called a capitation payment.

Insurance companies that manage to provide care for less than that government payment can use the difference, often called a rebate, to lower or even eliminate the premium they charge members, and to fund extra benefits like dental, vision, hearing, or fitness programs.

In other words, a $0-premium plan is not “free.” It is a plan where the insurer has structured its costs so that the government’s payment, plus your continued Part B premium, covers what they need without charging you an additional monthly amount on top.

This is a normal part of how the program is designed to work. It is also exactly why it pays to look past the premium line and understand the plan’s full cost structure.

To be clear from the outset: choosing a $0-premium plan is not automatically a mistake. For many people, especially those in good health with access to strong local networks, these plans work out well. The key is going in with your eyes open.

What “Free” Does Not Include: The Real Costs to Watch

1. Provider Networks

Most Medicare Advantage Plans, including $0-premium ones, use a defined network of doctors, specialists, and hospitals.

HMO-style plans generally require you to use in-network providers and often need a Referral to see a specialist.
PPO-style plans offer more flexibility to go out of network, but usually at a higher cost to you.

If your favorite doctor or nearby hospital is not in the plan’s network, you may need to switch providers or pay significantly more to keep seeing them. And networks are not fixed: plans can add or remove providers during the year. If a provider you see regularly leaves the network, the plan should make a good-faith effort to give you at least 30 days’ notice, but it is still worth checking your plan’s network every fall during Open Enrollment.

2. Prior authorization

Here is one of the biggest differences between Medicare Advantage and Original Medicare: Original Medicare generally does not require prior authorization for most services. Many Medicare Advantage plans do.

Prior authorization means your plan must approve certain services, procedures, or medications in advance. If a service is not approved, you could end up responsible for the full cost. This can affect anything from imaging tests to hospital stays to certain medications under the plan’s drug coverage rules.

This is not necessarily a dealbreaker. But it does mean an extra step between you, your doctor, and your care, and it is worth understanding before you need it, not in the middle of a health emergency.

3. Copays and Coinsurance

A $0 premium does not mean $0 cost when you actually use your plan. Most Medicare Advantage plans charge:

A copay for primary care visits
A higher copay for specialist visits
A daily charge for inpatient hospital stays, often starting from day one, structured differently than Original Medicare’s Deductible-based approach
Coinsurance or copays for outpatient procedures, Durable medical equipment, and other covered services

These amounts vary a great deal from plan to plan, which is exactly why it pays to read the plan’s “Summary of Benefits” closely rather than relying on the headline premium.

4. Maximum Out-of-Pocket Limits

Every Medicare Advantage plan is required to have a yearly maximum out-of-pocket limit for in-network services. Once you hit that limit, the plan pays 100% of covered costs for the rest of the year.

This is genuinely valuable protection, especially if you face a major medical event. But it is important to understand that the limit is often measured in thousands of dollars. You could pay meaningful amounts in copays and coinsurance over the course of a year, well before you ever reach that ceiling.

By contrast, Original Medicare paired with a Medigap policy is designed to absorb much of that 20% coinsurance as it happens, which creates a different kind of cost predictability. Neither approach is automatically better. They are simply different ways of structuring your financial exposure. Our guide on Medicare Advantage vs. Medicare Supplement plans compares the two side by side.

5. Annual Plan Changes (ANOC)

Medicare Advantage plans are allowed to change their costs, benefits, networks, and drug formularies from year to year. Each fall, your plan is required to send you an Annual Notice of Change (ANOC), a document that spells out what is changing for the upcoming year.

It is easy to set this notice aside. Do not. A plan that worked beautifully for you this year could look quite different next year: a higher specialist copay, a narrower network, a different drug tier for a medication you rely on. Reviewing your ANOC every fall, during the Medicare Open Enrollment Period (October 15 through December 7), is one of the simplest habits that can save you real money and frustration.

A Balanced Way to Think About It

None of this means $0-premium Medicare Advantage plans are bad, or that you are being tricked. For many people, they offer real value: bundled coverage, extra benefits like dental and vision, and a built-in cap on yearly out-of-pocket spending.

The goal here is not to scare you away from these plans. It is to help you walk in with clear eyes, so that “no monthly premium” does not turn into “surprising bills later.” A plan that looks free on the surface can still be the right choice for you. You just want to know the full picture before you sign up, not after your first hospital stay.

If you are weighing your options, our articles on why some people find Medicare Advantage plans frustrating and the hidden risks of Medicare Advantage offer additional perspective worth considering alongside this guide.

Questions to Ask Before You Enroll in a $0-Premium Plan

Are my current doctors, specialists, and hospitals in this plan’s network?
What are the copays for primary care visits, specialist visits, and hospital stays?
Which of my regular medications require prior authorization or Step therapy?
What is the plan’s maximum out-of-pocket limit, and how does that compare to my likely yearly costs?
How have this plan’s costs and benefits changed over the past few years?

Frequently Asked Questions

If the premium is $0, am I really paying nothing?
You will still pay your Part B premium, since Medicare Advantage plans require you to have both Part A and Part B. Beyond that, you will likely encounter copays, coinsurance, and other costs when you actually use care, even though there is no separate monthly bill for the plan itself.

Why would an insurance company offer a plan with no premium?
Insurers receive payments from the federal government to provide your Part A and Part B benefits. When they can manage care for less than that payment, they can use the difference to lower or eliminate your premium and to offer extra benefits. It is a standard part of how Medicare Advantage is designed to work.

Are $0-premium plans only for people in poor health, or only for healthy people?
Neither. These plans can work well for many different situations. The right fit depends on your specific doctors, medications, health needs, and how you feel about networks and prior authorization, not on a blanket rule about who should or should not consider them.

What is the Annual Notice of Change, and why does it matter?
It is a notice your plan sends every fall explaining what will change about your coverage for the next year, including costs, benefits, and provider networks. Reading it carefully each year helps you catch changes that might affect your care or your wallet before they take effect.

How is this different from Original Medicare with a Medigap policy?
Original Medicare paired with Medigap generally offers broader provider access and more predictable handling of the 20% coinsurance, often for a separate monthly premium. Medicare Advantage often comes with a lower or $0 added premium but uses networks, prior authorization, and cost-sharing that accrues as you use care. Our comparison guide breaks this down further.

Bottom Line

A $0-premium Medicare Advantage plan can be a genuinely good deal, or it can come with costs that catch you off guard. The difference usually comes down to whether you understood the full picture before you enrolled.

Look past the premium. Check the network. Understand the copays. Know your out-of-pocket maximum. And read your Annual Notice of Change every single fall. Do that, and you will be making an informed choice rather than chasing an attractive number on a postcard.

If you would like help comparing your specific options, schedule a free Medicare consultation with REMEDIGAP. A licensed advisor can walk through the details with you so you know exactly what you are signing up for.

This article is for educational purposes only and is not personalized financial, legal, or medical advice. Plan costs, networks, and benefits vary by carrier, plan, and location, and can change from year to year. Always review your plan’s current Summary of Benefits and Annual Notice of Change, or speak with a licensed Medicare advisor, before enrolling.

💡 Your next step: Thinking about switching from Medicare Advantage? See how Medicare Supplement plans compare to Medicare Advantage — most people are surprised by the difference.

Michael Quinn

Michael Quinn is a licensed Medicare insurance expert and cofounder of REMEDIGAP. With over a decade of experience, he helps people compare coverage options with clear, unbiased guidance. His insights have been featured by USA Today, NerdWallet and many other publications.

Zero-Premium Medicare Advantage Plans: The Hidden Costs