IMPORTANT: This tool can no longer be updated. As such, the IRMAA thresholds and premiums are no longer accurate. Please click here for the most up-to-date Part B IRMAA and here for the Part D IRMAA.
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Some people pay more for Medicare when they shouldn't. Others pay without knowing it. Either way, it's time to learn about IRMAA — what it is and what, if anything, you can do about it.