Using Medicare Modernization Act (MMA) Files to Identify Dually Eligible Individuals

Integrated Care Resource Center
July 2020

States need to be able to identify individuals who are (or will become) dually eligible for several reasons. Since 2005, states have exchanged files  -- known as the Medicare Modernization Act (MMA) files -- with the Centers for Medicare & Medicaid Services (CMS) that identify current and prospective dually eligible individuals. This technical assistance tools explains how states can identify Medicaid enrollees who are currently dually eligible, as well as Medicaid enrollees who will become dually eligible in the next three months (known as “prospective” dually eligible individuals) though the MMA files, and it discusses why more frequent exchange of these files with CMS can be beneficial for both states and dually eligible individuals.