CDC National Center for Health Statistics

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About the CDC National Center for Health Statistics


The mission of NCHS is to provide statistical information that will guide actions and policies to improve the health of the American people. As the Nation's principal health statistics agency, NCHS is responsible for collecting accurate, relevant, and timely data. NCHS' mission, and those of its counterparts in the Federal statistics system, focuses on the collection, analysis, and dissemination of information that is of use to a broad range of users.

Access the Data

Public-use FTP data:

A primary entry point for accessing data:

Contents of the Data

The contents of the data include:

National Health Care Survey (NHCS)

  • National Ambulatory Medical Care Survey (NAMCS)
  • National Hospital Ambulatory Medical Care Survey (NHAMCS)
  • National Hospital Discharge Survey (NHDS)
  • National Survey of Ambulatory Surgery (NSAS)
  • National Home and Hospice Care Survey (NHHCS)
  • National Employer Health Insurance Survey (NEHIS)

National Vital Statistics System (NVSS)

  • Natality (Births)
  • Mortality (Deaths)
  • Linked Birth/Infant Death
  • Fetal Death
  • National Mortality Followback Survey (NMFS)
  • National Survey of Family Growth (NSFG)
  • Matched Twins File
  • Mortality Component - Instruction Manuals
  • MICAR Data Dictionary

National Health Interview Survey (NHIS)

  • Questionnaires, Datasets, and Related Documentation

National Immunization Survey (NIS)

  • Public-Use Data Files

Longitudinal Studies of Aging (LSOA)

  • Data Files