Part B

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Part B covers services which are considered to be medically necessary for treating a disease or condition.  These services include lab tests, doctor visits, durable medical equipment (DME) and preventive services.  The monthly premium for Part B is based on your income plus any late enrollment penalties that may apply.

After you have paid an annual deductible, Medicare pays 80% of most Part B services and you pay 20% coinsurance.  Most preventive services are covered 100% by Medicare if you get the service from a provider who accepts assignment from Medicare.  There is no annual out-of-pocket maximum that limits your cost-sharing for Part B services.