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OASIS Data Set

OASIS-C1/ICD-9 Data Sets Effective 1/1/2015

The OASIS-C1/ICD-9 data set is required for all assessments completed on or after January 1, 2015 and until ICD-10 is implemented or until another disposition is made by CMS.  The complete set of OASIS-C1/ICD-9 data items, as well as the subsets of OASIS-C1/ICD-9 items that are to be collected at each time point (Start of Care, Recertification, etc.) can be found in the Downloads section below.  Detailed instructions for use of the OASIS data set can be found in OASIS-C1/ ICD-9 Guidance Manual, which is posted on the OASIS User Manuals page (see the link in the “Related Links” section below.)