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NIS Description of Data Elements
The NIS is set of longitudinal hospital inpatient databases included in the HCUP family. These databases are created by AHRQ through a Federal-State-Industry partnership.
 
DXSYS - Diagnosis coding system
 
Documentation Sections:
General Notes
Uniform Values
State Specific Notes
General Notes
 

DXSYS indicates the coding system for the diagnoses. For some sources, this information was available on the data record; for others, this information came from file documentation. This data element was discontinued in 1998.

 
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Uniform Values
VariableDescriptionValueValue Description
DXSYSDiagnosis coding system1ICD-9-CM
.Missing
.AInvalid
 
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State Specific Notes
None
 
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Internet Citation: HCUP NIS Description of Data Elements. Healthcare Cost and Utilization Project (HCUP). September 2008. Agency for Healthcare Research and Quality, Rockville, MD. www.hcup-us.ahrq.gov/db/vars/dxsys/nisnote.jsp.
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Last modified 9/17/08