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Unified Medical Language System® (UMLS®)

2009AA Outcome and Assessment Information Set Source Information

The Outcome and Assessment Information Set (OASIS) was developed and is maintained by the Center for Health Services Research, University of Colorado Health Sciences Center. The OASIS included in the Metathesaurus is extracted from LOINC® and may not be a complete representation of the original source.

OASIS is a set of standardized patient-level assessment items related to the patient's physical and emotional status.

OASIS is used by home health care agencies, managed care programs, and health services researchers.

OASIS items are now routinely collected by all Medicare-certified home health agencies.

Metathesaurus Update Frequency
OASIS is updated in each Metathesaurus release as part of LOINC.

Sites Consulted

  1. Focus: Center for Health Services Research. Geriatrics Forum. 2002 Spring [cited 2008 Sep 29]; 5(1):1, 3. Available from:

Last Reviewed: June 21, 2011