Definitions for "ICD-9"
International Classification of Diagnosis codes version 9
A standardized coding resource used by physicians and other health care professionals to identify various diseases and conditions. Categorized into 17 different areas, the coding system ranges from 001-999. The International Classification of Disorders is in its ninth edition.
A standard list of diagnoses and codes used for reporting patient diagnoses.  oint Commission on Accreditation of Healthcare Organizations