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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.
CHRONBn - Chronic Condition Indicators - body system
Documentation Sections:
General Notes
Uniform Values
State Specific Notes
General Notes

The Chronic Condition Indicator provides an easy way for users to categorize ICD-9-CM diagnosis codes into one of two categories: chronic or not chronic. In addition, the tool groups all diagnoses into body systems so that users can create indicators listing which specific body systems are affected by a chronic condition. The body system indicator is based upon the chapters of the ICD-9-CM codebook. More information on the Chronic Condition Indicators is available under Tools & Software on the HCUP-US website.

Uniform Values
VariableDescriptionValueValue Description
CHRONBnChronic Condition Indicators - body system11 = Infectious and parasitic disease
22 = Neoplasms
33 = Endocrine, nutritional, and metabolic diseases and immunity disorders
44 = Diseases of blood and blood-forming organs
55 = Mental disorders
66 = Diseases of the nervous system and sense organs
77 = Diseases of the circulatory system
88 = Diseases of the respiratory system
99 = Diseases of the digestive system
1010 = Diseases of the genitourinary System
1111 = Complications of pregnancy, childbirth, and the puerperium
1212 = Diseases of the skin and subcutaneous tissue
1313 = Diseases of the musculoskeletal system
1414 = Congenital anomalies
1515 = Certain conditions originating in the perinatal period
1616 = Symptoms, signs, and ill-defined conditions
1717 = Injury and poisoning
1818 = Factors influencing health status and contact with health services
State Specific Notes

Internet Citation: HCUP NIS Description of Data Elements. Healthcare Cost and Utilization Project (HCUP). September 2008. Agency for Healthcare Research and Quality, Rockville, MD.
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Last modified 9/17/08