What does Medicare Part B cover?

Coverage
Last updated: 
April 10, 2026
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The short answer

Medicare Part B covers doctor visits, outpatient care, preventive services like screenings and vaccines, and medically necessary services such as lab tests, imaging, and durable medical equipment. You typically pay 20% of the Medicare-approved amount after meeting your annual deductible.

The full explanation

Part B is the outpatient side of Original Medicare. It covers two broad categories: medically necessary services and preventive care.Medically necessary services include things like visits to your primary care doctor or specialist, outpatient surgery, mental health care, physical therapy, lab work, X-rays, MRIs, and durable medical equipment (walkers, wheelchairs, CPAP machines, and similar items). Basically, if a doctor orders it and Medicare deems it necessary to diagnose or treat a condition, Part B usually covers it.Preventive care includes annual wellness visits, flu shots, certain cancer screenings, diabetes screenings, and cardiovascular disease screenings. Many of these come with no cost-sharing if your doctor accepts Medicare assignment, meaning they've agreed to Medicare's approved payment rates.The standard setup is that Medicare pays 80% of the approved amount and you pay the remaining 20%, with no out-of-pocket cap on that 20%. That's why many people pair Part B with either a Medigap supplement or a Medicare Advantage plan, both of which can reduce or cap what you owe. Part B has a monthly premium and an annual deductible, and those amounts can change each year, so it's worth verifying current figures at medicare.gov or with a licensed agent.

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In 

Ohio

 specifically

In Ohio, Medicare plan options usually vary by county, and larger metro areas like Franklin, Cuyahoga, Hamilton, and Summit tend to have more Medicare Advantage competition than smaller counties. Ohio residents can also get free Medicare counseling through the Ohio Senior Health Insurance Information Program.

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What this means for you

For you, this means most of your regular doctor visits and outpatient care will be covered, but you'll want a plan that helps cover that 20% coinsurance since there's no annual limit on what that could add up to.

Related Questions

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Medicare Advantage Plans in 

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