INDUSTRY AND OCCUPATION CODING

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Coding Support Documents

Here you will find documents  on industry and occupation (I&O) coding classifications, instruction manuals for using NIOCCS (our I&O coding software), and I&O crosswalks. Crosswalk coding is the mapping of a code from one I&O classification coding scheme to another or to a different code within the same I&O coding scheme for a different year. If you have questions about any of these materials, please contact us at NIOCCS@cdc.gov.

Page last reviewed: March 6, 2019