Select a chapter below to view code categories and their definitions.
Certain infectious and parasitic diseases
Neoplasms
Congenital malformations, deformations and chromosomal abnormalities
Diseases of the blood and blood-forming organs and certain disorders involving the immune mechanism
Endocrine, nutritional and metabolic diseases
Mental, Behavioral and Neurodevelopmental disorders
Diseases of the nervous system
Diseases of the eye and adnexa
Diseases of the ear and mastoid process
Diseases of the circulatory system
Diseases of the respiratory system
Diseases of the digestive system
Diseases of the skin and subcutaneous tissue
Diseases of the musculoskeletal system and connective tissue
Diseases of the genitourinary system
Certain conditions originating in the perinatal period
Pregnancy, childbirth and the puerperium
Symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified
Injury, poisoning and certain other consequences of external causes
Codes for special purposes
External causes of morbidity
Factors influencing health status and contact with health services