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Part D-IRMAA Premium


Since the TRAIL prescription drug coverage includes a Medicare Part D benefit, Medicare requires that members of TRAIL whose annual income is above a certain limit to pay an additional premium called IRMAA (Income-Related Monthly Adjustment Amount).  Medicare will look back at your tax return from two years ago to determine your income.  For 2018, Medicare will be looking at 2016 tax returns.  For 2017, individual tax filers with an income over $85,000 on their 2015 tax return are required to pay the IRMMA.  For married-couples filing jointly, if their 2015 tax return income exceeded $170,000, they have to pay the IRMMA. These amounts could change for 2018. The Social Security Administration will send members whose income is verified by the IRS to exceed the established limits a predetermination letter indicating whether or not IRMAA will apply to the Medicare beneficiary. If applicable, IRMAA applies to both Medicare Parts B and D; therefore, members who pay an additional premium for their Medicare Part B coverage are the same members who will be charged the Medicare Part D IRMAA amount. Specifically, the 2017 base premium for Part B is $134.00*. Members will receive a quarterly bill in the mail from Social Security for these additional premiums. In order to remain in the Medicare Advantage plan, you must pay these additional premiums. Go to for IRMAA premium amounts.
*The Part B premium is for 2017 and may change for 2018.




Updated 07/20/2017