Hospital Inpatient Discharge Data
NHDS – Injury Summary
Medical information about discharges includes up to seven diagnoses and up to four surgical and nonsurgical operations and procedures. Medical data are coded to the International Classification of Diseases, 9th Revision, Clinical Modification (ICD-9-CM). Basic demographic information is also included for patients discharged. Medical cost information is not collected in this survey.
Injury data can be analyzed using principal or first-listed diagnosis codes or all diagnosis codes listed. The State and Territorial Injury Prevention Directors Association (STIPDA) has developed Consensus Recommendations for Using Hospital Discharge Data for Injury Surveillance Cdc-pdf[PDF – 150 KB]External.
Downloadable data files
Public-use microdata files are provided in ASCII format that requires the use of statistical software packages such as SAS, SPSS, Stata, etc. Individual-year public-use data files and documentation are available for download from the Web site via ftp, and a multiyear public-use data file for trend analysis is available on CD-ROM. More information is available at the National Hospital Discharge Survey website. These and other products can also be obtained by contacting the NCHS Information Dissemination Staff at (301) 458-4000, toll free 1-866-441-6247, or by email at NCHSquery@cdc.gov
Tools and Frameworks
The Barell Matrix is a two-dimensional array of three-, four-, and five-digit ICD-9-CM injury codes grouped by the body region of the injury and the nature of the injury and was developed by the International Collaborative Effort on Injury Statistics
ICD-9-CM Framework for Presenting Injury Morbidity Data-External Cause
This matrix contains the ICD-9-CM external cause of injury codes that are not included in ICD-9 mortality codes. In addition, a list of codes that have been added since 1994 is appended to the matrix.
For More Information see: ICD Injury Matrices
- State and Territorial Injury Prevention Directors Association (STIPDA) Consensus Recommendations for Using Hospital Discharge Data for Injury Surveillance.