Download ICD-9-CM diagnosis and procedure code files with abbreviated and full code titles for reference, billing, and historical data use 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. 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. 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. Related Links ICD-9-CM Diagnosis and Procedure Codes: Abbreviated and Full Code Titles ICD-9-CM is used to code and classify morbidity data from the inpatient and outpatient records, physician offices, and most National Center for Health Statistics (NCHS) surveys. 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. The ICD-9-CM is based on the ICD but provides for additional morbidity detail and is annually updated. 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.