Linkage Methods and Analytic Support for NCHS-CMS Medicare Data

NCHS-CMS Medicare Linkage (2014-2018)

• The Linkage of National Center for Health Statistics Surveys to Medicare Enrollment, Claims/Encounters and Assessment Data (2014-2018): Methodology and Analytic Considerations [PDF – 744 KB]
  Contains an overview of the data sources, the methods used for linkage, descriptions of the resulting linked data files, and analytic considerations
• Match Rate Table for NCHS-CMS Medicare Files (2014-2018) [PDF – 818 KB]
  Table providing NCHS-CMS Medicare linked file sample sizes and percentage linked, by survey and age at interview
• Sample Sizes for Restricted-Use NCHS-CMS Medicare Files (2014-2018) [PDF – 510 KB]
  Tables providing sample sizes for each NCHS-CMS Medicare linked files by NCHS survey, type of Medicare file and Medicare enrollment/claims/encounter/assessment year

• Medicare Advantage Enrollment Table for NCHS-CMS Medicare Files (2014-2018) [PDF – 2 MB]
  Table providing unweighted percentage of NCHS-CMS Medicare linked sample aged 65 and over at time of interview enrolled in a Medicare Advantage plan (for at least 1 month during year)

NCHS-CMS Medicare Linkages (1999-2013)

• The Linkage of National Center for Health Statistics Surveys to Medicare Enrollment and Claims Data (1999-2013): Methodology and Analytic Considerations [PDF – 394 KB]
  Contains an overview of the data sources, the methods used for linkage, descriptions of the resulting linked data files, and analytic considerations
• Match Rate Table for NCHS-CMS Medicare Files (1999-2013) [PDF – 131 KB]
  Table providing NCHS-CMS Medicare linked file sample sizes and percentage linked, by survey and age at interview
• Sample Sizes for Restricted-Use NCHS-CMS Medicare Files (1999-2013) [PDF – 281 KB]
  Tables providing sample sizes for each NCHS-CMS Medicare linked files by NCHS survey, type of Medicare file and Medicare enrollment/claims year
• Medicare Advantage Enrollment Table for NCHS-CMS Medicare Files (1999-2013) [PDF – 142 KB]
  Table providing unweighted percentage of NCHS-CMS Medicare linked sample aged 65 and over at time of interview enrolled in a Medicare Advantage plan (for at least 1 month during year)

NCHS-CMS Medicare Linkages (1991-1998)

• Linkage of NCHS Population Health Surveys to Administrative Records from Social Security Administration and Centers for Medicare Medicaid Services.

Additional Resources:

• NHANES–CMS Linked Data Tutorial
• Centers for Medicare & Medicaid Services (CMS) website
• Medicare and You Handbook
• Medicare Program—General Information
• Research Data Assistance Center (ResDAC) at the University of Minnesota