The Long-Term Care Minimum Data Set (MDS) is a standardized, primary screening and assessment tool of health status that forms the foundation of the comprehensive assessment for all residents in a Medicare and/or Medicaid-certified long-term care facility. The MDS contains items that measure physical, psychological and psychosocial functioning. The items in the MDS give a multidimensional view of the patient's functional capacities and helps staff to identify health problems.
All requests for identifiable data must be developed and reviewed with the assistance of the Research Data Assistance Center (ResDAC) prior to submission to CMS. http://www.resdac.org/MDS/data_available.asp