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ICD-10-CM-2019 Diagnosis Codes Overview
Chapter 1A00-B99Certain infectious and parasitic diseases ICD
Chapter 2C00-D49Neoplasms ICD
Chapter 3D50-D89Diseases of the blood and blood-forming organs and certain disorders involving the immune mechanism ICD
Chapter 4E00-E89Endocrine, nutritional and metabolic diseases ICD
Chapter 5F01-F99Mental, Behavioral and Neurodevelopmental disorders ICD
Chapter 6G00-G99Diseases of the nervous system ICD
Chapter 7H00-H59Diseases of the eye and adnexa ICD
Chapter 8H60-H95Diseases of the ear and mastoid process ICD
Chapter 9I00-I99Diseases of the circulatory system ICD
Chapter 10J00-J99Diseases of the respiratory system ICD
Chapter 11K00-K95Diseases of the digestive system ICD
Chapter 12L00-L99Diseases of the skin and subcutaneous tissue ICD
Chapter 13M00-M99Diseases of the musculoskeletal system and connective tissue ICD
Chapter 14N00-N99Diseases of the genitourinary system ICD
Chapter 15O00-O9APregnancy, childbirth and the puerperium ICD
Chapter 16P00-P96Certain conditions originating in the perinatal period ICD
Chapter 17Q00-Q99Congenital malformations, deformations and chromosomal abnormalities ICD
Chapter 18R00-R99Symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified ICD
Chapter 19S00-T88Injury, poisoning and certain other consequences of external causes ICD
Chapter 20V00-Y99External causes of morbidity ICD
Chapter 21Z00-Z99Factors influencing health status and contact with health services ICD


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