Medicare Premium 2025 Income Brackets. To determine your irmaa, you'll need to use your 2022 modified adjusted gross income (magi). Medicare part b costs (2025) medicare part b covers outpatient.

The table below shows the sum of the part b premium, part b irmaa, and part d irmaa for the higher income brackets for 2025. The 2024 irmaa brackets for medicare parts b and d are now available.