RAI-MDS [Resident Assessment Instrument - Minimum Data Sets] are a core set of screening, clinical and functional status data elements, including common definitions and coding categories, that forms the foundation of the comprehensive assessment for all residents of long-term care facilities certified to participate in Medicare and Medicaid and in Department of Veterans Affairs (VA) Long-term Care, Geriatric Care and/or Nursing Home Programs accredited under the Joint Commission on Accreditation of Healthcare Organization (JCAHO) Long-term Care Standards. Items in the RAI-MDS standardize communication about patient problems and conditions within facilities, between facilities, and between facilities and outside agencies. For more information about these tools that are in the public domain, use the following links -