The United States is facing a revolution in the health care system soon when the present coding system (International Classification of Diseases, Ninth Revision) will be replaced with what has for some years been the international standard: International Statistical Classification of Diseases, 10th Revision (ICD-10). The ICD-10 system will provide a tremendous opportunity for better capturing information in the increasingly complex delivery of health care. Although the transition to ICD-10 will undoubtedly result in substantial short-term costs, the long-term benefits make the transition imperative.