2026 Adjustments to Medicare Parts A, B, and D: A Technical Review of Premiums and IRMAA Calculations
On November 14, 2025, the Centers for Medicare & Medicaid Services (CMS) released the finalized amounts for premiums, deductibles, and coinsurance under the Medicare Part A and Part B programs for the 2026 calendar year, concurrently announcing the Medicare Part D income-related monthly adjustment amounts (IRMAA). This technical brief reviews the statutory context and the specific figures relevant to client planning for 2026, focusing particularly on the impact of modified adjusted gross income (MAGI) thresholds on Part B and Part D premiums.
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