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Why Out-of-Pocket Costs Matter in Medicare

Medicare covers a lot, but not everything. Even people with Medicare Part A and Part B still pay money when they see a doctor, fill a prescription, or stay in the hospital. These payments are called out-of-pocket costs, and they can add up quickly if you don't understand how they work.

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Many Medicare beneficiaries are surprised by these costs. You might expect that having Medicare means you won't pay much, but the reality is different. For example, if you go to the hospital, you'll pay a deductible for your hospital stay. If you need a specialist, you might pay 20 percent of the cost after you meet another deductible. If you take prescription drugs, you pay for those too—sometimes a lot, depending on your plan and the medication.

The tricky part is that out-of-pocket costs vary based on which Medicare plan you have. Someone with Original Medicare (Part A and B) pays differently than someone with a Medicare Advantage plan. Someone with a prescription drug plan (Part D) has different pharmacy costs than someone without one. Without understanding these differences, it's hard to budget for healthcare or know what you'll actually spend in a given year.

This is why learning about out-of-pocket costs matters. When you understand how costs work under different Medicare plans, you can make better decisions about which plan fits your situation. You can also plan your healthcare spending and know what to expect when you receive medical care.

Practical takeaway: Out-of-pocket costs are the amounts you pay directly for healthcare, separate from your Medicare premium. These costs vary by plan type and healthcare service. Knowing what these costs are helps you budget and choose the right Medicare plan.

The Different Types of Out-of-Pocket Costs You'll Encounter

Medicare creates several types of out-of-pocket costs. Each one comes into play at different times, and understanding each type helps you know what to expect when you use healthcare services.

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Deductibles are the amount you pay before Medicare or your insurance plan starts to help pay. In Original Medicare Part A, there's a hospital deductible (which was $1,556 in 2024). In Part B, there's a medical deductible (which was $240 in 2024). In Medicare Advantage and Part D plans, deductibles vary. Once you meet your deductible, you typically pay less, but you still pay something.

Copayments (or copays) are fixed amounts you pay for specific services. For example, you might pay $25 every time you visit your primary care doctor. Copays don't count toward your deductible; you pay them in addition to or instead of coinsurance.

Coinsurance is a percentage of the cost you share with Medicare or your insurance plan. In Original Medicare Part B, you typically pay 20 percent of the cost of services after you meet your deductible. The government pays the other 80 percent. In hospital stays under Part A, you pay coinsurance for days 61-90 and beyond.

Premiums are what you pay monthly for coverage. Part B and Part D have premiums. So do Medicare Advantage plans. While premiums aren't technically "out-of-pocket" costs for care, they're money you pay for Medicare coverage and affect your total healthcare costs.

Out-of-pocket maximums are annual spending limits. Once you reach this limit in a calendar year, your plan typically pays 100 percent of covered services for the rest of that year. In Original Medicare, there's no annual out-of-pocket maximum, which means you could pay a lot if you have serious health issues. In Medicare Advantage, there is a maximum. In 2024, that maximum was $8,050 for in-network services.

Practical takeaway: The main cost types are deductibles (amount you pay before coverage starts), copays (fixed amounts per visit), coinsurance (percentage of costs), premiums (monthly payments), and out-of-pocket maximums (annual spending caps). Knowing which types apply to your plan helps you predict expenses.

How Costs Differ Between Original Medicare and Medicare Advantage

The type of Medicare plan you have changes your out-of-pocket costs significantly. Original Medicare (Part A and Part B) and Medicare Advantage plans work differently, and that difference shows up in your wallet.

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Original Medicare is run by the federal government. You pay premiums, deductibles, and coinsurance. As mentioned, in 2024 you paid $240 for the Part B deductible and 20 percent coinsurance for most services after that. Hospital care has a different structure—you pay a deductible for each hospital stay, then coinsurance for days 61 through 90, and even more for days 91 and beyond. The problem with Original Medicare is that there's no out-of-pocket maximum. If you have a serious illness and need a lot of care, your costs could exceed $10,000, $15,000, or more in a year. This is why many people with Original Medicare purchase a Medigap (supplemental insurance) policy to cover some of these costs.

Medicare Advantage plans (Part C) are offered by private insurance companies. These plans bundle Part A and Part B coverage and often include Part D (prescription drugs) and other benefits like dental or vision. Medicare Advantage plans have out-of-pocket maximums, which limits your total spending. However, they often have lower deductibles and smaller copays than Original Medicare. The trade-off is that Medicare Advantage plans have networks—you usually need to see doctors and hospitals in that network, or you pay more. If you travel or see specialists frequently, network restrictions might matter to you. Also, not all medications or treatments may be covered the same way as they would be in Original Medicare.

Real example: Imagine you need hip replacement surgery. In Original Medicare, you'd pay the hospital deductible ($1,556 in 2024), then coinsurance for your hospital stay. You'd also pay 20 percent of the surgeon's fee. Your total could easily be $3,000 to $5,000 or more, with no annual maximum to cap it. In a Medicare Advantage plan with a $5,000 out-of-pocket maximum, once you spend that $5,000, the plan pays everything else for the rest of the year. But your copays or coinsurance rates might be higher along the way to reach that maximum.

Practical takeaway: Original Medicare offers freedom to see any doctor but has higher per-service costs and no annual spending cap. Medicare Advantage has lower per-service costs and annual spending limits but restricts which providers you can see. Your total yearly costs depend on how much care you use and which plan you're in.

Prescription Drug Costs Under Part D

Prescription drugs are often one of the biggest out-of-pocket expenses for Medicare beneficiaries. Part D is the prescription drug program, and it has its own set of costs and phases that many people find confusing.

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When you enroll in a Part D plan, you pay a monthly premium. Then, when you fill a prescription, you enter what's called the "initial coverage phase." During this phase, you pay a copay or coinsurance for each medication—the amount depends on the drug and your plan. Most Part D plans have a formulary, which is a list of covered drugs. Drugs are typically placed in tiers. Tier 1 might include generic drugs with low copays ($5-10). Tier 2 might include brand-name drugs with higher copays ($25-50). Higher tiers cost more. Some plans use coinsurance instead—you pay a percentage like 25 or 33 percent.

As you fill prescriptions and pay copays or coinsurance, you move toward the "coverage gap," often called the "donut hole." This gap exists because Part D coverage has a limit. In 2024, the initial coverage phase limit was $5,850. Once you and your plan have spent that much on covered drugs, you enter the coverage gap. In the gap, you pay a larger percentage of drug costs. The good news is that in recent years, the out-of-pocket cost for drugs in the gap has been capped. In 2024,