What Medicare Part B Covers: Doctor Visits and More

Medicare Part B primarily covers medically necessary doctor visits, outpatient care, preventive services, and durable medical equipment, which helps you stay healthy and get care when needed. You generally pay a monthly premium and an annual deductible for these services.

Key Takeaways

• Medicare Part B covers many essential outpatient medical services and supplies.
• It helps pay for doctor visits, preventive care, lab tests, and durable medical equipment.
• You typically pay a monthly premium, an annual deductible, and coinsurance for Part B services.
• Late enrollment penalties can apply if you don't sign up when first eligible and don't have other creditable coverage.
• Part B costs and coverage details can vary, especially with Medicare Advantage Plans.

What Services Does Medicare Part B Cover?

Medicare Part B is your medical insurance. It covers a wide range of outpatient services. These are services you typically receive outside of a hospital inpatient stay. Understanding these benefits helps you use your Medicare effectively.

Part B helps pay for services and supplies needed to diagnose or treat your medical condition. It also covers services that prevent illness or detect it at an early stage. This includes a broad spectrum of care, from routine check-ups to specialized treatments.

Medically Necessary Services

Part B covers doctor visits when they are medically necessary. This means a service or supply is needed to diagnose or treat an illness, injury, condition, disease, or its symptoms. This includes visits to general practitioners and specialists like cardiologists or dermatologists. Medicare also covers many tests your doctor orders, such as X-rays, blood work, and MRIs, when medically necessary.

Outpatient hospital services are also covered. These include emergency room visits if you are not admitted as an inpatient. It also covers observation stays in a hospital, even if you stay overnight. Surgeries performed in an outpatient setting are also generally covered.

Preventive Services

Medicare Part B places a strong emphasis on preventive care. Many preventive services are covered at no cost to you, as long as your doctor accepts Medicare assignment. These services aim to keep you healthy and catch potential problems early. Examples include flu shots and pneumonia vaccines, which are covered once a year or as recommended.

You also get an Annual Wellness Visit each year. This visit helps you and your doctor develop or update a personalized prevention plan. It does not include a physical exam, but it's a chance to discuss your health and risks. Screenings for conditions like cancer (colorectal, cervical, prostate), diabetes, and cardiovascular disease are also covered. These can help detect serious conditions early, often when they are more treatable.

Durable Medical Equipment (DME)

Part B helps cover durable medical equipment (DME). This is medical equipment prescribed by your doctor for use in your home. Examples include wheelchairs, walkers, oxygen equipment, hospital beds, and nebulizers. The equipment must be medically necessary and able to withstand repeated use. You typically rent or buy DME from a Medicare-approved supplier.

Mental Health Services

Medicare Part B covers various outpatient mental health services. This includes visits with psychiatrists, psychologists, clinical social workers, and other mental health professionals. Therapy sessions, counseling, and psychiatric evaluations are covered. Part B also covers partial hospitalization programs if you need intensive outpatient mental health care. These services help manage conditions like depression, anxiety, and other mental health concerns.

Other Important Part B Coverages

Ambulance services are covered if you need medically necessary transport. This applies when other transportation could endanger your health. Clinical research studies may also be covered under Part B, helping you access new treatments. Some limited prescription drugs are covered by Part B. These are typically drugs given in a doctor's office or hospital outpatient setting, such as injections or infusions. For most prescription drugs you pick up at a pharmacy, you will need Medicare Part D coverage, which is separate. For more details on overall Medicare parts, you can read /articles/understanding-medicare-your-guide-to-parts-a-b-c-and-d.

What Are the Costs for Medicare Part B?

Understanding the costs associated with Medicare Part B is important for budgeting your healthcare. There are several components to Part B costs, which can vary based on your income.

Part B Monthly Premium

Most people pay a standard monthly premium for Medicare Part B. The 2026 standard Part B premium is $202.90. This amount is usually deducted from your Social Security benefit payment. If you are not receiving Social Security benefits, you will receive a bill for your premium.

Some people pay more than the standard premium. This is due to IRMAA (Income-Related Monthly Adjustment Amount). If your modified adjusted gross income from two years ago is above a certain amount, you will pay an extra charge. About 6 out of 100 Medicare beneficiaries pay IRMAA. For example, a single person with a modified adjusted gross income of $105,000 in 2024 (for 2026 premiums) would pay an additional amount on top of the standard premium. This extra charge helps fund the Medicare program.

Part B Annual Deductible

Before Medicare starts to pay its share for most Part B services, you must meet an annual deductible. The 2026 Medicare Part B annual deductible is $283. This means you pay the first $283 of your Medicare-approved medical costs each year. After you meet this deductible, Medicare begins to pay its portion.

Part B Coinsurance

Once you have met your annual deductible, Medicare generally pays 80% of the Medicare-approved amount for most Part B services. You are then responsible for the remaining 20% coinsurance. For example, if a doctor's visit has a Medicare-approved amount of $100 and you've met your deductible, Medicare pays $80, and you pay $20. There is no annual limit on how much you might pay for the 20% coinsurance under Original Medicare.

Some doctors and providers accept Medicare assignment. This means they agree to accept the Medicare-approved amount as full payment. If your doctor doesn't accept assignment, they can charge you up to 15% more than the Medicare-approved amount. This is called the limiting charge. You would be responsible for this extra amount in addition to your 20% coinsurance.

When Should You Enroll in Part B?

Enrolling in Medicare Part B at the right time is important to avoid potential penalties and coverage gaps. Your eligibility typically begins around your 65th birthday.

Initial Enrollment Period (IEP)

Your first chance to enroll in Medicare Part B is during your Initial Enrollment Period (IEP). This is a 7-month window. It begins three months before the month you turn 65, includes the month you turn 65, and extends for three months after the month you turn 65. For example, if your birthday is in July, your IEP runs from April 1 to October 31.

If you sign up during the first three months of your IEP, your coverage can start as early as your birthday month. If you enroll later in your IEP, your coverage start date will be delayed. It's often ideal to enroll during this period to ensure seamless coverage once you turn 65. Missing this window without other creditable coverage can lead to late enrollment penalties.

Special Enrollment Periods (SEPs)

Many people continue working past age 65. If you have group health coverage through an employer (or your spouse's employer) with 20 or more employees, you might be able to delay Part B enrollment. You can enroll later during a Special Enrollment Period (SEP). This SEP lasts for eight months after your employer coverage ends or you stop working, whichever happens first. You will not face a late enrollment penalty if you enroll during this SEP. It's crucial to understand these rules to avoid penalties. You can find more helpful information in /articles/your-medicare-turning-65-checklist-navigating-your-options.

General Enrollment Period (GEP)

If you miss your Initial Enrollment Period and don't qualify for a Special Enrollment Period, you can enroll during the General Enrollment Period (GEP). This period runs from January 1 to March 31 each year. If you enroll during the GEP, your coverage typically starts on July 1. Enrolling during this period often means paying a late enrollment penalty, which we will discuss next.

Avoiding Part B Late Enrollment Penalties

Delaying enrollment in Medicare Part B can lead to permanent late enrollment penalties. These penalties can increase your monthly premium for as long as you have Part B.

The Part B late enrollment penalty is 10% for each full 12-month period you could have had Part B but didn't sign up. This applies unless you had other creditable health coverage, such as group health coverage from an employer with 20 or more employees. For example, if you waited two full years (24 months) to enroll after your Initial Enrollment Period ended and you didn't have other qualifying coverage, your Part B premium would be 20% higher. Using the 2026 standard premium of $202.90, an extra 20% would be about $40.58 added to your monthly premium for life. This penalty can add up over time, making it important to enroll when you are first eligible or during a valid Special Enrollment Period.

How Does Part B Work with Other Medicare Choices?

Medicare Part B is a core component of your health coverage, but it interacts differently depending on the type of Medicare plan you choose.

Original Medicare

Original Medicare consists of Part A (hospital insurance) and Part B (medical insurance). When you have Original Medicare, Part B directly covers the services mentioned above. You can go to any doctor, hospital, or provider in the U.S. that accepts Medicare. To help with the costs not covered by Original Medicare (like deductibles and coinsurance), many people choose to add a Medigap (Medicare Supplement Insurance) policy. Medigap plans work with Original Medicare to pay some or all of your out-of-pocket costs, such as the 20% coinsurance for Part B services.

Medicare Advantage Plans (Part C)

Medicare Advantage Plans (Part C) are offered by private insurance companies approved by Medicare. If you join a Medicare Advantage Plan, you still need to be enrolled in both Medicare Part A and Part B. You will continue to pay your Part B premium. Your Medicare Advantage Plan then provides all your Part A and Part B benefits. These plans must cover at least everything that Original Medicare Part A and Part B cover. Many plans also offer extra benefits, such as dental, vision, and hearing coverage.

With a Medicare Advantage Plan, you generally get your Part B services through the plan's network of doctors and hospitals. You may have different copayments, coinsurance, and deductibles than with Original Medicare. The specific costs and rules vary greatly by plan and location. Even if you have a $0 premium Medicare Advantage Plan, you must still pay your Part B premium. It's important to understand the differences between these options.

While both options cover Part B services, how you access them and your costs can differ significantly. For instance, Original Medicare offers broader provider choice, while Medicare Advantage plans may offer additional benefits and often have network restrictions. Carefully comparing your options can help you choose the right path.

Medicare Part D (Prescription Drug Coverage)

Medicare Part B generally does not cover most prescription drugs you pick up at a pharmacy. Prescription drug coverage is provided through Medicare Part D. You can get Part D through a stand-alone Prescription Drug Plan (PDP) if you have Original Medicare. Or, you might get it as part of a Medicare Advantage Plan (MAPD) that includes drug coverage. While Part B covers some drugs administered in a medical setting, Part D is crucial for your retail prescriptions.

Making the Most of Your Part B Coverage

To get the most value from your Medicare Part B benefits, here are some practical tips:

• Find Participating Providers: Always ask your doctors if they accept Medicare assignment. This ensures they accept the Medicare-approved amount and won't charge you more than the standard coinsurance and deductible.
• Understand Your Medicare Summary Notice (MSN): Medicare sends you an MSN every three months. This notice details all the services you received, what Medicare paid, and what you may owe. Review it carefully for any errors or services you don't recognize.
• Utilize Preventive Services: Take advantage of your Annual Wellness Visit and all recommended preventive screenings. Many are covered at 100% and are key to maintaining your health and detecting issues early. This can help prevent more serious (and costly) health problems down the road.
• Discuss Coverage with Your Doctor: Talk to your doctor about whether a service or supply is covered by Medicare Part B before you receive it. They can often provide clarity or help you find Medicare-approved alternatives. If you have questions about specific items, you can always check Medicare.gov or call 1-800-MEDICARE.

Being proactive with your Medicare Part B can help you manage your health and healthcare costs effectively. Remember to keep track of your enrollment dates and coverage choices.

Have questions? Call 1-877-443-3251 to talk it through with a licensed insurance agent. They're paid by the plans they represent, never by you, and the decision stays yours.

We do not offer every plan available in your area. Any information we provide is limited to those plans we do offer in your area. Please contact Medicare.gov or 1-800-MEDICARE to get information on all of your options. Medicare has neither reviewed nor endorsed this information.