Understanding Medicare Part B: What It Covers and What It Doesn't
Medicare Part B is medical insurance run by the federal government that helps pay for doctor visits, outpatient care, and certain medical equipment. It's different from Part A, which covers hospital stays. Part B covers services that happen outside of a hospital setting, though some services may be covered in hospitals too.
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The guide explains what Part B actually covers. Doctor visits to your primary care doctor or specialists fall under Part B. If you see a cardiologist, dermatologist, or any other type of doctor in their office or an outpatient clinic, Part B can help pay for that. Mental health counseling and therapy services are included. Physical therapy and occupational therapy are covered when a doctor orders them. Preventive services like annual wellness visits and certain screenings—such as mammograms, colonoscopies, and bone density tests—are part of what Part B offers.
There are limits to what Part B covers. It does not pay for dental care, vision exams for glasses or contacts, hearing aids, or routine foot care. Prescription drugs are handled through a separate program called Part D. Part B does not cover long-term care or custodial care at home. Experimental treatments and procedures not yet approved by the FDA are typically not covered. Some medical equipment requires specific conditions to be met before Medicare will help pay.
Understanding these boundaries matters because people often assume Medicare covers everything medical. The reality is more specific. A person might think their routine eye exam is covered and be surprised to learn Part B does not include that. However, if that same person has diabetes and needs an eye exam to monitor diabetic retinopathy, that screening might be covered as a preventive service related to their condition.
Practical Takeaway: Review the coverage details in the guide that match your current health needs. Make a list of doctors you see and services you use regularly, then cross-reference them against what the guide says Part B covers. This helps you understand what costs might be your responsibility.
The Monthly Premium: What You'll Pay Each Month in 2024
The Part B premium is the monthly fee you pay to have this insurance coverage. In 2024, the standard premium is $164.90 per month for most people. This is money that comes out of your Social Security check if you receive benefits, or you pay it directly to Medicare if you don't.
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However, not everyone pays the same premium. Income affects what you pay. This system is called Income-Related Monthly Adjustment Amount, or IRMAA. If your income is higher, you pay a higher Part B premium. For 2024, the income brackets that trigger higher premiums start at $97,000 for single filers and $194,000 for married couples filing jointly. People with higher incomes than these amounts pay premiums ranging from $230.80 to $560.50 per month, depending on exactly how much income they have.
The income amounts Medicare uses to calculate your premium are from two years prior to your enrollment year. This means your 2024 Part B premium is based on your income from 2022. This creates a lag that sometimes surprises people. You might have retired in 2023, lowering your income, but your 2024 premium reflects your higher 2022 income. You can request a review if your life circumstances changed significantly between the year they're using and now.
Some people pay less than the standard premium or nothing at all. If you receive certain low-income assistance programs, the government may cover your Part B premium. Additionally, married couples where one spouse is on Medicare and one is not can have different premiums, and they're calculated separately.
The guide walks through examples. A single person with $85,000 in annual income pays the standard $164.90. A single person with $150,000 in annual income would pay $325.70 in 2024. A married couple with combined income of $250,000 would each pay a higher amount than the standard premium.
Practical Takeaway: Calculate what your Part B premium will likely be based on your income from the previous year. If you're transitioning into retirement or expect major income changes, note that timing matters for premium calculations. The guide includes an income chart you can reference to see which bracket applies to you.
Deductibles, Copays, and Coinsurance: What Comes Out of Your Pocket
Beyond the monthly premium, Part B has other out-of-pocket costs. These include a deductible, copayments, and coinsurance. Understanding each one prevents confusion at the doctor's office or when bills arrive.
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The Part B deductible in 2024 is $240. This means after you pay the first $240 for Part B services in a calendar year, Medicare starts to share costs with you. You must meet this deductible before Medicare helps pay. If you only see a doctor once and the bill is $200, you pay the full $200 and haven't yet met your deductible. Once you see another doctor and spend $40 more, you've reached $240 total, and the deductible is satisfied for the rest of that year. The deductible resets on January 1st each year.
Copayments are fixed dollar amounts you pay for specific services. For a doctor visit, after you've met your deductible, you typically pay 20% of what Medicare approves as the cost. This isn't exactly a copay in the traditional sense—it's coinsurance. Some services, like lab work, might have different coinsurance rates. Mental health services follow the same 20% coinsurance rule after the deductible.
Coinsurance means you pay a percentage of the cost. After meeting your $240 deductible, Medicare generally covers 80% of approved charges for most Part B services, and you pay the remaining 20%. If a doctor's visit is approved at $150, you'd pay $30 (which is 20% of $150) and Medicare pays $120. For outpatient hospital services, you might pay 20% coinsurance or a fixed copay depending on the specific service.
One important detail: these costs only apply if you see doctors and providers who accept Medicare assignment. When a provider accepts assignment, they agree to accept Medicare's approved amount as payment in full. They cannot bill you for more than your share of that approved amount. If a provider does not accept assignment, you may be responsible for more out-of-pocket costs.
The guide includes a table showing 2024 cost-sharing amounts for common Part B services: doctor visits, specialist visits, physical therapy, occupational therapy, and ambulance services. Each shows the deductible requirement and coinsurance percentage.
Practical Takeaway: Before scheduling a service or appointment, ask the doctor's office if they accept Medicare assignment. Then calculate your likely costs by finding the approved amount for that service, applying your 20% coinsurance, and remembering that you only pay your coinsurance after meeting the $240 deductible. Add a buffer to your budget because actual approved amounts can vary.
How Part B Works With Other Insurance: Supplements and Advantage Plans
Most people who have Part B also have additional insurance to cover some of those copayments, coinsurance, and deductibles. The guide explains the two main paths people take: Medigap supplemental insurance or Medicare Advantage plans. These are different approaches with different costs and coverage.
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Medigap policies are private insurance policies that work alongside Original Medicare (Part A and Part B). They are standardized by the federal government, meaning all Plan F policies offered by different insurers cover the same benefits. Medigap helps pay your Medicare deductible, coinsurance, and copayments. For example, a Medigap Plan G might cover your Part B coinsurance, meaning you don't pay the 20% out of pocket for doctor visits—Plan G pays it. Medigap plans have their own monthly premiums, typically ranging from $100 to $300 per month depending on the plan letter and your age. In 2024, the average Medigap Plan G premium runs about $200 to $250 monthly for someone in their mid-60s, though this varies by location and insurance company.
Medicare Advantage plans, sometimes called Part C, are an alternative to Original Medicare. Instead of having Part A and Part B separately, you get all your coverage through one private insurance company that contracts with Medicare. These plans often include prescription drug