International Classification of Diseases,Ninth Revision, Clinical Modification (ICD-9-CM)
The International Classification of Diseases, Ninth Revision, Clinical Modification (ICD-9-CM) is based on the World Health Organization’s Ninth Revision, International Classification of Diseases (ICD-9). 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.
The ICD-9-CM consists of:
- a tabular list containing a numerical list of the disease code numbers in tabular form;
- an alphabetical index to the disease entries; and
- a classification system for surgical, diagnostic, and therapeutic procedures (alphabetic index and tabular list).
The National Center for Health Statistics (NCHS) and the Centers for Medicare and Medicaid ServicesExternal
ICD-9-CM on CD-ROM
The ICD-9-CM Rom is unavailable.
Rich Text Format (RTF) Files
A version in Rich Text Format (RTF) of the 2011 edition is available for downloading from the Centers for Disease Control and Prevention’s (CDC)/FTP server.