An official website of the Department of Health & Human Services
Search All AHRQ Websites
Careers
Contact Us
Espanol
FAQs
Email Updates
Database Information
Research Tools
Request Data
Reports & Publications
Data Visualizations
Data Query Tools
Home
About
Need Help?
HEALTHCARE COST & UTILIZATION PROJECT
User Support
Home
About
Need Help?
Do Your own analysis
Explore Expert Research & Limited Datasets
DATABASE
INFORMATION
RESEARCH TOOLS
Tools for ICD-10-CM/PCS
Clinical Classifications Software Refined (CCSR)
Elixhauser Comorbidity Software Refined for ICD-10-CM
Chronic Condition Indicator Refined for ICD-10-CM
Procedure Classes Refined for ICD-10-PCS
Tools for CPT and HCPCS Level II
CCS for Services and Procedures
Surgery Flags for Services and Procedures
Tools for ICD-9-CM
Clinical Classifications Software (CCS) for ICD-9-CM
Chronic Condition Indicator (CCI) for ICD-9-CM
Elixhauser Comorbidity Software for ICD-9-CM
Utilization Flags for Revenue Center Codes and ICD-9-CM
Procedure Classes for ICD-9-CM
Surgery Flags for ICD-9-CM
HCUP Supplemental Files
NIS-Trend Weights Files
NIS Hospital Ownership Files
NIS 1993-2002 Discharge-Level Supplemental Files
KID-Trend File
Cost-to-Charge Ratio (CCR) Files
Hospital Market Structure (HMS) Files
Supplemental Variables for Revisit Analyses
American Hospital Association (AHA) Linkage Files
AHRQ Quality Indicators (QIs)
REQUEST DATA
REPORTS &
PUBLICATIONS
Favorites
Statistical Briefs
Summary Trend Tables
Findings-At-A-Glance
Publications
Information About Using HCUP Data
Methods Series
ICD-10-CM/PCS Resources
Database Reports
Additional Topics and Archives
Topical Reports
Enhancing Administrative Data
Reports Archive
DATA
VISUALIZATIONS
DATA QUERY
TOOLS
NASS Related Reports
The following report provides information on how to use the Nationwide Ambulatory Surgery Sample (NASS).
NIS Variance Report (Methods also apply to the NASS):
Calculating Nationwide Inpatient Sample Variances (
PDF
file, 317 KB;
HTML
)
Email Updates