| CHRONBn | Chronic Condition Indicators - body system | 1 | 1 = Infectious and parasitic disease |
| 3 | 3 = Endocrine, nutritional, and metabolic diseases and immunity disorders |
| 4 | 4 = Diseases of blood and blood-forming organs |
| 6 | 6 = Diseases of the nervous system and sense organs |
| 7 | 7 = Diseases of the circulatory system |
| 8 | 8 = Diseases of the respiratory system |
| 9 | 9 = Diseases of the digestive system |
| 10 | 10 = Diseases of the genitourinary System |
| 11 | 11 = Complications of pregnancy, childbirth, and the puerperium |
| 12 | 12 = Diseases of the skin and subcutaneous tissue |
| 13 | 13 = Diseases of the musculoskeletal system |
| 14 | 14 = Congenital anomalies |
| 15 | 15 = Certain conditions originating in the perinatal period |
| 16 | 16 = Symptoms, signs, and ill-defined conditions |
| 17 | 17 = Injury and poisoning |
| 18 | 18 = Factors influencing health status and contact with health services |