To determine your Part B premium, we use the most recent tax return information provided by the Internal Revenue Service (IRS). In most cases, this information is for two years prior to the year for which you must pay an income-related premium. For example, we usually used your 2005 tax return information for your 2007 premium. For 2008, we generally would use your 2006 tax return information.
To report the change, you can use Form SSA-44, Medicare Part B Income-Related Premium - Life-Changing Event.
For more information, see Social Security's publication, Medicare Part B Premiums: New Rules For Beneficiaries With Higher Incomes, call us toll-free at 1-800-772-1213 (TTY 1-800-325-0778) or visit your local Social Security office.
To learn more about Medicare Part B coverage, visit www.medicare.gov.