Deductible and premium The deductible for Medicare Part B is $257. You will pay this deductible once each year before Original Medicare starts to pay Medicare Part B premium is usually $185 each month, but can sometimes be higher depending on your income You will usually pay 20% of the cost for each Medicare - covered service after you have paid your deductible The amount changes each year and you will pay the premium monthly regardless of how often you use Part B covered services Co - Insurance - Inpatient and Outpatient You will pay 20% of the Medicare - approved amount for most doctor services while you are a hospital inpatient You will usually pay 20% of the Medicare - approved amount for doctor and other health care providers services when receiving outpatient hospital care You will pay a copayment for each service you get in a hospital outpatient setting(with the exception to certain preventative services) Co - Insurance for Durable Medical Equipment (DME) You will usually pay 20% of the Medicare - approved amount for DME (hospital beds, walkers, wheelchairs etc. Medicare Part B