Medicare-Medicaid Linked Enrollee Analytic Data Source

The Medicare-Medicaid Linked Enrollee Analytic Data Source (MMLEADS) has been developed to allow for the examination of all Medicare and Medicaid enrollment and claims data for those who were dually enrolled in both programs. The file includes records for Medicare-only, Medicare/Medicaid dually enrolled and the Medicaid-only enrollees with Blind/Disabled elgibility codes.  The current files are intended for both CMS and external researcher use. They are primarily designed to address questions regarding eligibility, enrollment, cost, use, and select physical and mental health conditions. The file includes data for the 27 CCW Chronic Conditions as well as the 25 Mental Health, Tobacco, Physical and Mental Disability Conditions.   This comprehensive suite of annual, calendar year data files contains:

  • Medicare Beneficiary Files
  • Medicaid Beneficiary Files
  • Medicare Service Files
  • Medicaid Service Files
  • Conditions Files
CY 2006-2011
Next Year Request Date: 
August, 2017
Data File Classification