Primary tabs

Agency for Healthcare Research and Quality

The Agency for Healthcare Research and Quality's (AHRQ) mission is to produce evidence to make health care safer, higher quality, more accessible, equitable, and affordable, and to work within the U.S. Department of Health and Human Services and with other partners to make sure that the evidence is understood and used.

License

Other (Not Open)

Other Access

The information on this page (the dataset metadata) is also available in these formats.

JSON RDF

via the DKAN API

HCUP National (Nationwide) Inpatient Sample (NIS) - Restricted Access File

The NIS is the largest publicly available all-payer inpatient care database in the United States. It contains data from approximately 8 million hospital stays each year. Restricted access data files are available with a data use agreement and brief online security training.

The 2012 NIS was redesigned. The new NIS is a sample of discharges from all hospitals participating in HCUP. For prior years, the NIS was a sample of hospitals. The NIS allows for weighted national estimates to identify, track, and analyze national trends in health care utilization, access, charges, quality, and outcomes.

The NIS is drawn from States participating in HCUP. NIS data are available since 1988, allowing analysis of trends over time.

The NIS includes charge information for all patients, regardless of payer, including persons covered by Medicare, Medicaid, private insurance, and the uninsured.

The NIS's large sample size enables analyses of rare conditions, such as congenital anomalies; uncommon treatments, such as organ transplantation; and special patient populations, such as the uninsured.

The NIS contains clinical and resource use information included in a typical discharge abstract, with safeguards to protect the privacy of individual patients, physicians, and hospitals (as required by data sources). The NIS excludes data elements that could directly or indirectly identify individuals.

Data and Resources

FieldValue
Publisher
Modified Date
2017-11-30
Release Date
2017-11-27
Frequency
Annually
Homepage URL
Identifier
bae01dec-8c8a-48c0-8d22-e0f85f2edd8e
Temporal Coverage
Thursday, December 31, 1987 - 19:00 to Thursday, December 31, 2015 - 00:00
License
Other (Not Open)
Granularity
Sub-National Region
Author
Agency for Healthcare Research and Quality
Data Dictionary
Contact Name
HCUP User Support
Contact Email
Public Access Level
Restricted
Bureau Code
009:33 - Agency for Healthcare Research and Quality
Additional Info: 
FieldValue

Agency Program URL

http://www.hcup-us.ahrq.gov/

Collection Frequency

Annually

Date Released

1994-06-01 00:00:00

Date Updated

2017-11-27

Group Name

Healthcare Cost and Utilization Project

License Agreement Required

1

Subject Area 1

Health Care Cost

Subject Area 2

Health Care Providers

Technical Documentation

http://www.hcup-us.ahrq.gov/db/nation/nis/nisdbdocumentation.jsp

Unit of Analysis

hospital discharge

author_id

http://healthdata.gov/id/agency/ahrq

hd2-workflow-id

23874

publisher_1

Department of Health & Human Services