International Classification of Diseases, 10th Revision, Clinical Modification (ICD-10-CM) provided by the Centers for Medicare and Medicaid Services (CMS) and the National Center for Health Statistics (NCHS), for medical coding and reporting in the United States. The ICD-10-CM is a morbidity classification for classifying diagnoses and reason for visits in all American health care settings. The ICD-10-CM is based on the ICD-10, the statistical classification of disease published by the World Health Organization (WHO) which replaces ICD-9.

The implementation of ICD-10 was delayed from October 1, 2013 to October 1, 2014 by final rule CMS-0040-F issued on August 24, 2012.
Until that time the codes in ICD-10-CM are not valid for use.