What Is Irmaa For 2025. Irmaa is a surcharge added to your medicare parts b and d premiums, based on income. Your modified adjusted gross income (magi) is the primary factor used to determine irmaa.

On november 8, 2024, the centers for medicare & medicaid services (cms) released the 2025 premiums, deductibles, and coinsurance amounts for the medicare part a and part b. Learn about irmaa income brackets for 2024 and 2025.