Original: The International Statistical Classification of Diseases and Related Health Problems ( most commonly known by the abbreviation ICD ) provides codes to classify diseases and a wide variety of signs , symptoms , abnormal findings , complaints , social circumstances and external causes of injury or disease .
Simplified: The International Classification of Diseases and Related Health Problems ( also known as ICD ) is a list of codes to classify diseases , including signs , symptoms , abnormal findings , social circumstances , complaints and external causes of injury or disease .