The ICD-9-CM is based on the ICD but provides for additional morbidity detail and is annually updated. 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. Download ICD-9-CM diagnosis and procedure code files with abbreviated and full code titles for reference, billing, and historical data use The final ICD-9-CM release contains 14,567 diagnosis codes organized into 20 chapters, including the supplementary V-code and E-code classifications. ICD-9-CM was retired on October 1, 2015, when ICD-10-CM replaced it on U.S. claims. Complete information about medical diagnosis codes, the ICD-9-CM Vol. 1 Code Set is used to classify diseases and a wide variety of signs, symptoms, abnormal findings, complaints, social circumstances and external causes of injury or disease. Look up any of the 14,567 ICD-9-CM diagnosis codes by code or description, with or without the decimal point, and jump from any code to its ICD-10 replacement through the official CMS crosswalks. ICD-9-CM Diagnosis codes for diagnosing and documenting medical conditions (also ICD9, ICD-9, ICD9CM). Lookup ICD-9 codes to get official descriptors and code usage advice. Codify by AAPC helps you to crosswalk from ICD-9 to ICD-10 codes. ICD9Data.com takes the current ICD-9-CM and HCPCS medical billing codes and adds 5.3+ million links between them. Combine that with a Google-powered search engine, drill-down navigation system and instant coding notes and it's easier than ever to quickly find the medical coding information you need. See also International Statistical Classification of Diseases and Related Health Problems: ICD-9 – provides multiple external links for looking up ICD codes.