The Bureau of Labor Statistics (BLS) developed the Occupational Injury and Illness
Classification System (OIICS) to characterize occupational injury and illness incidents.
OIICS was originally released in 1992. The BLS redesigned OIICS in 2010 with subsequent
revisions in 2012. The OIICS includes four hierarchical coding structures: Nature
of the injury or illness; Part of Body Affected by the injury or illness; Source and Secondary Source
of the injury or illness; and Event or Exposure.
NIOSH in collaboration with the BLS has developed this web site and the accompanying
downloadable software application as a resource for occupational safety and health
researchers, policy makers, employers, and others who may need to use the OIICS
for uniformly characterizing occupational injuries and illnesses or better understanding
the national occupational injury and illness data released by the BLS and NIOSH
(see About OIICS). To code or use
the OIICS coded data one should properly understand the OIICS Coding Selection Rules.
This site provides graphical tree interfaces for the current OIICS version (v2.01)
and the earlier version (v1.01) that was in use before the redesign. The coding
trees are searchable and include descriptive details. The complete OIICS manuals
are viewable as a separate document. In addition, standalone software versions of the coding trees are available for download
and installation on your own computer desktop.
Coding Selection Rules