Special Use Research File

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A Special Use Research File (SURF) containing non-publicly available California Health Interview Survey (CHIS) variables may be available to interested researchers and their associated organizations. Researchers must submit an application for review by the CHIS Data Disclosure Review Committee (DDRC).


The cost of obtaining a SURF is $500.00 (except for the 2-Year PUF). This cost covers application review, data file setup, and basic technical assistance.

Standard SURFs

The Data Access Center provides template SURFs for the CHIS Discrimination Module (DM). SURF content and additional documentation can be found in the respective page below.



Students who are interested in using the CHIS Discrimination Module SURF for their thesis or dissertation can submit a DAC scholarship application to waive a portion of costs. Please submit the application below to: dacchpr@ucla.edu

Student DAC Scholarship Application



With the switch to single-year PUF data files, two-year data files are now made available upon request for 2011-2012, 2013-2014, 2015-2016, and 2017-2018. The smaller sample size of the one-year data requires collapsing some variables, such as small racial/ethnic groups. If you need access to a population group that is not available in the one-year file (such as Native American or Other Pacific Islander), please submit an application for the Two-Year PUF to the Data Access Center by completing the form below and emailing it to dacchpr@ucla.edu. This datafile is provided free of charge.