SID Database Documentation

The State Inpatient Databases (SID) are State-specific files that contain all inpatient care records in participating states. Together, the SID encompass more than 95 percent of all U.S. hospital discharges. The uniform format of the SID helps facilitate cross-state comparisons. In addition, the SID are well suited for research that requires complete enumeration of hospitals and discharges within geographic areas or states.

The following links provide database documentation for the SID, from a high-level Overview to all the detailed specifications, restrictions, and resources necessary for researchers working and publishing with the SID.
 
Description of SID Database Restrictions on Use File Specifications and Load Programs Data Elements Additional Resources for Data Elements
  • HCUP Quality Control Procedures (PDF file, 460 KB; HTML)
  • HCUP Coding Practices (PDF file, 138 KB; HTML)
  • HCUP Hospital Identifiers (PDF file, 162 KB; HTML)
ICD-10-CM/PCS Data Included in the SID Starting With 2015 Known Data Issues HCUP Tools: Labels and Formats
  • Format Programs
    • DRG Formats Program (TXT file, 1.5 MB) Creates SAS formats to label the values of each DRG and MDC category
    • HCUP Formats Program (TXT file, 108 KB) Creates SAS formats to label the values of selected categorical data elements in HCUP files
    • HCUP Diagnosis and Procedure Groups Formats Program (TXT file, 8 KB) Creates SAS formats to label the values of HCUP Diagnosis and Procedure Groups data elements, including Clinical Classifications Software Refined (CCSR) data elements
    • ICD-9-CM Formats Program (TXT file, 910 KB) Creates SAS formats to label the values of ICD-9-CM Diagnoses and Procedures
    • ICD-10-CM Formats Program (TXT file, 12.2 MB) Creates SAS formats to label the values of ICD-10-CM Diagnoses and Procedures
    • Severity Formats Program (TXT file, 816 KB) Creates SAS formats to label the values of data elements in HCUP Severity Files
HCUP Supplemental Files Obtaining HCUP Data

Internet Citation: SID Database Documentation. Healthcare Cost and Utilization Project (HCUP). September 2021. Agency for Healthcare Research and Quality, Rockville, MD. www.hcup-us.ahrq.gov/db/state/siddbdocumentation.jsp.
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Last modified 9/15/21