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.Medicare Part B does not have copays in the same way that Medicare Advantage or Part D plans do.
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.Original Medicare (Parts A and B) does not have an out-of-pocket maximum, meaning your costs could potentially be uncapped, according to the National Council on Aging (NCOA).
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.Many preventive services covered by Part B have no cost-sharing (deductible, coinsurance, or copayment).
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.In 2025, the annual deductible for Part B is $257.
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.After the deductible, you'll generally pay 20% of the Medicare-approved amount for most services.