NCHS Data Linkage

NCHS Data Linked to CMS Medicaid Enrollment and Claims Files

NCHS has linked various surveys with Medicaid enrollment and claims records collected from the Centers for Medicare & 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 and the elderly U.S. populations.

Medicaid enrollment and claims data for 1999 through 2014 are available for all successfully matched NCHS survey participants. For certain NCHS surveys, the Medicaid administrative files include data from before and/or after the survey year of interview.

NCHS Surveys Linked to CMS Medicaid Data

  • 1994-2013 National Health Interview Survey (NHIS)
  • 1999-2012 National Health and Nutrition Examination Survey (NHANES)
  • NHANES I Epidemiologic Follow-up Study (NHEFS)
  • Third National Health and Nutrition Examination Survey (NHANES III)
  • The Second Longitudinal Study of Aging (LSOA II)
  • 2004 National Nursing Home Survey (NNHS)
  • 2007 National Home and Hospice Care Survey (NHHCS)

Linked NCHS-CMS Medicaid Data Bibliography


The details of the linked data, linkage methods, and analysis considerations, are available from the links on the navigation menu. For additional questions, contact the Data Linkage Team:

Data Linkage Team
Division of Analysis and Epidemiology
National Center for Health Statistics
Centers for Disease Control and Prevention
3311 Toledo Road
Hyattsville, MD 20782

Page last reviewed: January 26, 2022, 09:40 AM