Skip directly to search Skip directly to A to Z list Skip directly to navigation Skip directly to site content Skip directly to page options
CDC Home

Data Access

NCHS Data Linked to CMS Medicaid Enrollment and Claims Files

NCHS has developed a record linkage program designed to maximize the scientific value of the Center's population-based surveys. NCHS is currently linking various NCHS surveys with Medicaid enrollment and claims records collected from the Centers for Medicare and Medicaid Services (CMS). Linkage of the NCHS survey participants with the CMS Medicaid data provides the opportunity to study changes in health status, health care utilization and expenditures in low income families with children, the elderly and disabled U.S. populations.

Overview of NCHS-CMS Medicaid Linkage

Medicaid enrollment and claims data are available for those NCHS respondents who agreed to provide personal identification data to NCHS and for whom NCHS was able to match with Medicaid administrative records. CMS provided NCHS with Medicaid benefit claims data for 1999 through 2007 for all successfully matched NCHS survey participants.

NCHS Surveys linked to CMS Medicaid data (1999 – 2009)

  • 1994-2005 National Health Interview Survey (NHIS)
  • 1999-2004 National Health and Nutrition Examination Survey (NHANES)
  • 2004 National Nursing Home Survey (NNHS)
  • NHANES I Epidemiologic Follow-up Study (NHEFS)
  • Third National Health and Nutrition Examination Survey (NHANES III)
  • The Second Longitudinal Study of Aging (LSOA II)

Accessing the NCHS-CMS Medicaid Data

The linked NCHS-CMS Medicaid files are restricted-use files that can be accessed through the NCHS Research Data Center (RDC). NCHS has created Feasibility Study Data files to assist researchers who are considering submitting an RDC application to analyze the linked NCHS- CMS Medicaid data.

Documentation and Analytic/Programming Support

Contact Information

After carefully reviewing web documentation, any remaining questions can be directed to:

Contact Us:
  • National Center for Health Statistics
    3311 Toledo Rd
    Room 5419
    Hyattsville, MD 20782-2064
  • 1 (800) 232-4636
    TTY: 1 (888) 232-6348
  • Contact CDC–INFO
  • Page last reviewed: November 6, 2015
  • Page last updated: March 6, 2014
  • Content source: CDC/National Center for Health Statistics
  • The U.S. Government's Official Web PortalDepartment of Health and Human Services
    Centers for Disease Control and Prevention   1600 Clifton Rd. Atlanta, GA 30329-4027, USA
    800-CDC-INFO (800-232-4636) TTY: (888) 232-6348 - Contact CDC-INFO