Data Tools for Researchers


MMCO Data Tools

The CMS Medicare-Medicaid Coordination Office (MMCO) developed special tools to help you study health care utilization, expenditures, health status, and other characteristics of people who are enrolled in both Medicare and Medicaid.

  • MMLEADS PUF - Medicare-Medicaid Linked Enrollee Analytic Data Source, version 2.0 Public Use File (MMLEADS PUF V2.0 (XLSX)) (2006-2012):

◊   Free Public Use File (PUF) Excel document

◊   Makes the data within the CCW-hosted MMLEADS-v2.0 accessible to everyone, irrespective of technical readiness to analyze the files

◊   Has summary information for full and partial benefit Medicare-Medicaid enrollees as well as Medicare-only and Medicaid-only with disability

◊   Has information on eligibility, enrollment, cost, use, and broad array of health, mental health, and disability-related conditions

◊   Is available for all states and the nation as a whole, for years 2006 through 2012

  • MMLEADS - Medicare-Medicaid Linked Enrollee Analytic Data Source, version 2.0 (MMLEADS-v2.0):

◊   A suite of linked Medicare and Medicaid claims' summary files

◊   Allows for the examination of all Medicare and Medicaid enrollment and claims data for those dually enrolled

◊   Summary files are primarily designed to address eligibility, enrollment, cost, use, and a broad array of health, mental health, and disability-related conditions

◊   Available years include 2006 through 2012

◊   MMLEADS v2.0 User Guide (June, 2017) (PDF)

◊   MMLEADS Data Dictionaries

◊   More information on how to request MMLEADS

◊   CMS' database of multiple chronic condition indicators or variables (i.e., "flags") on all beneficiaries in the Medicare, Medicaid and Medicare-Medicaid dually enrolled populations

◊   All flags are available for calendar years 2000 through 2012

◊   Medicare-only flags are also available for more recent data

◊   Condition indicators built from Medicare and Medicaid claims data across the following two sets:

Set 1: CCW Chronic Conditions (original set)

Set 2: Other Chronic or Potentially Disabling Conditions (developed by MMCO), including:

♦   New! (as of September, 2018) Opioid Use Disorder (OUD), Utilization of Medication-Assisted Therapy (MAT) for OUD, and Opioid-related Hospitalizations/Emergency Department (ED) visits

♦   8 Mental health conditions

♦   14 disability-related conditions (intellectual, developmental, and physical)

♦   Alcohol use disorder, Drug use disorder, and Tobacco use disorder

♦   Pain-related conditions (Fibromyalgia, Chronic Pain and Chronic Fatigue, Migraine and Other Chronic Headache)


♦   8 Viral Hepatitis conditions

♦   Other conditions (e.g., Leukemia and Lymphoma, Liver-related conditions (excluding Hepatitis), Obesity, Pressure Ulcers and Chronic Ulcer, Peripheral Vascular Disease)

*In addition to the HIV/AIDS flag, there are six additional HIV/AIDS-related flags: HIV Screening; Antiretroviral Medication Use; HIV/AIDS Health Care Services Contact; HIV/AIDS program participation; SSA Disability-Qualifying Primary and Secondary Diagnoses.

Page Last Modified:
09/12/2019 11:07 AM