Icd 9 cm is the official system of assigning codes to diagnoses and procedures associated with hospital utilization in the united states the icd 9 was used to code and classify mortality data from death certificates until 1999 when use of icd 10 for mortality coding started. Icd 9 cm medical diagnosis codes the international statistical classification of diseases and related health problems commonly known as the icd provides alpha numeric codes to classify diseases and a wide variety of signs symptoms abnormal findings complaints social circumstances and external causes of injury or disease. The international classification of diseases ninth revision clinical modification icd 9 cm is the us health systems adaptation of international icd 9 standard list of six character alphanumeric codes to describe diagnoses. 001 139 infectious and parasitic diseases 140 239 neoplasms 240 279 endocrine nutritional and metabolic diseases and immunity disorders 280 289 diseases of the blood and blood forming organs 290 319 mental disorders 320 389 diseases of the nervous system and sense organs 390 459 diseases of the circulatory system 460 519 diseases of the respiratory system 520 579 diseases of the . 4th 796 other nonspecific abnormal findings 7960 nonspecific abnormal toxicological findings abnormal levels of heavy metals or drugs in blood urine or other tissue excludes excessive blood level of alcohol 7903 7961 abnormal reflex
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