Download ICD-9-CM diagnosis and procedure code files with abbreviated and full code titles for reference, billing, and historical data use 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. 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. See also International Statistical Classification of Diseases and Related Health Problems: ICD-9 – provides multiple external links for looking up ICD codes Find ICD-9-CM diagnosis codes, previously used by CMS for medical coding. Explore its numeric structure, limitations in specificity. 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. 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.