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Outcome and Assessment Information Set (OASIS)

The purpose of this site is to store and disseminate policy and technical information related to OASIS (the Outcome and Assessment Information Set) data set for use in home health agencies (HHAs), State agencies, software vendors, professional associations and other Federal agencies in implementing and maintaining OASIS.

Any HHA seeking Medicare certification is required to meet the Medicare Conditions of Participation (CoP) prior to certification. This includes compliance with the OASIS collection and transmission requirements. New HHAs must demonstrate that they can transmit OASIS data prior to the initial certification survey. Transmission must also occur upon receipt of the CMS Certification Number. CMS advises HHAs to save copies of their validation reports.

If you are a new HHA seeking Medicare certification, see the Regulations page in this Section and the download below.

Please check these pages frequently for additional menu items (below) and the policy and program material they will convey.