ICD-9-CM International Classification of Diseases

ICD – International Classification of diseases currently has its 10 th edition followed all over the world, but ICD-9-CM International Classification of Diseases, Ninth Revision, Clinical Modification proved to be greater impact on the US healthcare industry since ICD-9-CM has been followed in US for many years from 1979 to till date and the US government decided to implement ICD-10 in October 2013. The categories in ICD-9-CM are numbered below

1. 001-139: Infectious and parasitic diseases
2. 140-239: Neoplasms
3. 240-279: Endocrine, nutritional and metabolic diseases, and immunity disorders
4. 280-289: Diseases of the blood and blood-forming organs
5. 290-319: Mental disorders
6. 320-359: Diseases of the nervous system
7. 360-389: Diseases of the sense organs
8. 390-459: Diseases of the circulatory system
9. 460-519: Diseases of the respiratory system
10. 520-579: Diseases of the digestive system
11. 580-629: Diseases of the genitourinary system
12. 630-676: Complications of pregnancy, childbirth, and the puerperium
13. 680-709: Diseases of the skin and subcutaneous tissue
14. 710-739: Diseases of the musculoskeletal system and connective tissue
15. 740-759: Congenital anomalies
16. 760-779: Certain conditions originating in the perinatal period
17. 780-799: Symptoms, signs, and ill-defined conditions
18. 800-999: Injury and poisoning
19. E800-E999: Supplementary Classification Of External Causes Of Injury And Poisoning
20. V01-V89: Supplementary Classification Of Factors Influencing Health Status And Contact With Health Services

To know more about official coding guides. Please click http://www.cms.hhs.gov/ICD9ProviderDiagnosticCodes
To know more about the diagnosis code index. Please click http://www.icd9data.com/