The International Classification of Diseases (ICD) is a system developed by the World Health Organization to categorize morbid entries based on established criteria. It encompasses a wide range of conditions in a manageable number of categories, facilitating mortality reporting. The Clinical Modifications, produced by the U.S. Department of Health and Human Services, are extensions used primarily for morbidity and general epidemiological purposes, especially in the United States.The International Classification of Diseases (ICD) is a system developed by the World Health Organization to categorize morbid entries based on established criteria. It encompasses a wide range of conditions in a manageable number of categories, facilitating mortality reporting. The Clinical Modifications, produced by the U.S. Department of Health and Human Services, are extensions used primarily for morbidity and general epidemiological purposes, especially in the United States.