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.

• Opioid Use Disorder (OUD) Indicators - Four indicators are now available on the CCW for use with Medicare & Medicaid data. For more information, visit the CCW data page at https://www.ccwdata.org/web/guest/condition-categories (lower portion of page) 

• 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

• Chronic Condition Data Warehouse (CCW) Condition Flags (CCW Condition Flags)
  • 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)
      • HIV/AIDS*
      • 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.*

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We’re always looking for ways to improve the experience and usability of our webpages. If you’ve Feedback or issues to report, please contact us at MMCOWeb@cms.hhs.gov.