“CMS explains that if your modified adjusted gross income is above a certain amount, you may pay an Income Related Monthly Adjustment Amount (IRMAA). Medicare uses the modified adjusted gross income reported on your IRS tax return from 2 years ago. This is the most recent tax return information provided to Social Security by the IRS.” – www.medicare.gov

“Surcharges applied to your Medicare Part B and Part D if your income exceeds certain limits.”