Medicare-Medicaid Linked Enrollee Analytic Data Source (MMLEADS) 3.0

The Medicare-Medicaid Linked Enrollee Analytic Data Source (MMLEADS) 3.0 suite of files combines Medicare and Medicaid enrollment and claims data into two annual beneficiary-level files. The files include beneficiaries who are Medicare-only, Medicare-Medicaid dually enrolled and Medicaid-only blind and disabled.

What is different about MMLEADS 3.0?

MMLEADS now consists of two files—a beneficiary summary file and single cost (i.e., payments) and use (i.e., claim counts) file that combines Medicare and Medicaid information. CCW Chronic Condition and other condition flags are no longer provided.

Source data

Medicare: FFS, PDE and MA
Medicaid: T-MSIS data

What does this file include? (variable highlights)

  • Eligibility, enrollment variables
  • Aggregated claim counts and payment amounts
    • Medicare: FFSPDE includes FFS and MA
    • Medicaid: FFS, managed care encounter where available
  • Both files are released for approved MMLEADS data requests
    • Beneficiary file
    • Medicare and Medicaid cost and use file

Special considerations

External resource of detailed information on MMLEADS files and structure: CCW MMLEADS User Guide

Availability of this file

CY 2016
See what is in this file