Each year the Medicare Part B premium, deductible, and coinsurance rates are determined according to the Social Security Act. The standard monthly premium for Medicare Part B enrollees will be $170.10 for 2022, an increase of $21.60 from $148.50 in 2021. The annual deductible for all Medicare Part B beneficiaries is $233 in 2022, an increase of $30 from the annual deductible of $203 in 2021.