National Inpatient Sample (NIS)

The National Inpatient Sample (NIS) is a large, nationally representative database that collects information on hospital stays across the United States. It includes details such as patient diagnoses, treatments, outcomes, and hospital characteristics. Researchers and policymakers use the NIS to analyze healthcare trends, evaluate hospital performance, and inform health policy decisions. It provides a comprehensive overview of inpatient care, covering a wide range of conditions and services, helping improve understanding of healthcare utilization and quality at a national level.