Nationwide Inpatient Sample (NIS) (doi:10.7910/DVN/UXHCOW)

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Nationwide Inpatient Sample (NIS)

doi:10.7910/DVN/UXHCOW

Harvard Dataverse

2011-08-05

1

2011, "Nationwide Inpatient Sample (NIS)", https://doi.org/10.7910/DVN/UXHCOW, Harvard Dataverse, V1

Nationwide Inpatient Sample (NIS)

Healthcare Cost and Utilization Project (HCUP)

doi:10.7910/DVN/UXHCOW

N/A

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Harvard Dataverse

2011-08-05

https://doi.org/10.7910/DVN/UXHCOW

Hospital, Inpatient, Healthcare Cost and Utilization Project, HCUP, Nationwide Inpatient Sample, NIS, inpatient discharge, discharge, hospital discharge, primary payer, medicare, medicaid, private insurance, comorbidities, rural hospital, urban hospital, teaching hospital, non-teaching hospital, health-care utilization, care utilization, health access, health-care access, health charges, health-care charges, health-care quality, care quality, charges, quality, care access, health-care outcomes, care outcomes

The Nationwide Inpatient Sample (NIS) is a database focused on hospital stay information. Users are able to use the NIS to identify, track, and analyze national trends in health care utilization, access, charges, quality, and outcomes. <p><b>Background</b></p> The Nationwide Inpatient Sample (NIS) is maintained by the Healthcare Cost and Utilization Project. The NIS is the largest all-payer inpatient care database in the United States. It contains data from approximately 8 million hospital stays each year. The 2009 NIS contains all discharge data from 1,050 hospitals located in 44 States, approximating a 20-percent stratified sample of U.S. community hospitals. The sampling frame for the 2009 NIS is a sample of hospitals that comprises approximately 95 percent of all hospital discharges in the United States. The NIS is the only national hospital database containing charge information on all patients, regardless of payer, including persons covered by Medicare, Medicaid, private insurance, and the uninsured. <p><b>User functionality </b></p> Users must pay to access the database. NIS releases for data years 1988-2009 are available from the HCUP Central Distributor. The 2009 NIS may be purchased for $50 for students and $350 for all others on a single DVD-ROM with accompanying documentation. . <p><b>Data Notes </b></p> NIS data are available from 1988 to 2009. The number of states in the NIS has grown from 8 in the first year to 44 at present. Beginning with the 2002 NIS, severity adjustment data elements including APR-DRGs, APS-DRGs, Disease Staging, and AHRQ Comorbidity Indicators, are available. Begi nning with the 2005 NIS, Diagnosis and Procedure Groups Files containing data elements from AHRQ software tools designed to facilitate the use of the ICD-9-CM diagnostic and procedure information are available. Beginning with the 2007 NIS, data elements describing hospital structural characteristics and provision of outpatient services are available in the Hospital Weights file. NIS Release 1 includes data from 8-11 States and spans the years 1988 to 1992. NIS Releases 2 and 3 contain data from 17 States for 1993 and 1994, respectively. NIS Releases 4 and 5 contain data from 19 States for 1995 and 1996. NIS Release 6 contains data from 22 States for 1997. NIS 1998 contains data from 22 States. NIS 1999 contains data from 24 States. NIS 2000 contains data from 28 States. NIS 2001 contains data from 33 States. NIS 2002 contains data from 35 States. NIS 2003 contains data from 37 States. NIS 2004 contains data from 37 States. NIS 2005 contains data from 37 States. NIS 2006 contains data from 38 States. NIS 2007 contains data from 40 States. NIS 2008 contains data from 42 States.

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