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Exchange company coding, NCHS (HISTATEE)

Codes and Frequencies

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For sample adults and sample children (and, prior to 2019, all persons) with State-sponsored health coverage, this variable reports the exchange company coding for the variable HISTATEE.


This variable is comparable before 2019. Questionnaire changes introduced in 2019 may limit comparability with earlier years.

The NHIS questionnaire was substantially redesigned in 2019 to introduce a different data collection structure and new content. For more information on changes in terminology, universes, and data collection methods beginning in 2019, please see the user note.


  • 2016-2018: All persons with state-sponsored health coverage
  • 2019-2022: Sample adults age 18+ and sample children age 0-17 with state-sponsored health coverage.


  • 2016-2022