International Classification of Diseases 9th Edition (ICD-9)
The disease tabular list is also known as Volume II of ICD-9. This sections contains the Tabular List to ICD-9-CM diseases and related health problems, a chronological list of codes divided into chapters based on body system or condition.
The Disease Index (Alphabetic) is also known as Volume I of ICD-9. This section contains the alphabetical index to ICD-9-CM diseases and related health problems. This alphabetic index is arranged by condition. Conditions may be expressed as nouns, adjectives, and eponyms. Some conditions have multiple entries under their synonyms.
This section contains the index to the ICD-9 codes which classify environmental events, circumstances, and other conditions as the cause of injury and other adverse effects. The alphabetic index to the E codes is organized by main terms which describe the accident, circumstance, event, or specific agent which caused the injury or other adverse effect.
This table contains a classification of drugs and other chemical substances to identify poisoning states and external causes of adverse effects. Each of the listed substances in the table is assigned a code according to the poisoning classification (960-989). These codes are used when there is a statement of poisoning, overdose, wrong substance given or taken, or intoxication.
This is a great tool that you can use to convert data from ICD-9-CM to ICD-10-CM and vice versa. The GEMs are also known as crosswalks as they provide important information linking codes of one system with codes in the other system. The GEMs are a comprehensive translation dictionary that can be used to accurately and effectively translate any ICD-9-CM-based data.