International Classification of Diseases, 10th Revision, Clinical Modification. ICD-10-CM is a clinical modification of the World Health Organization’s ICD-10 for medical coding and reporting in the U.S. ICD-10-CM includes the level of detail needed for morbidity classification and diagnostic specificity. It also provides code titles and language that complement accepted clinical practice. In 2013, the U.S. will adopt ICD-10 as an updated, expanded follow-up to ICD-9-CM, the previous standard. ICD-10-CM consists of more than 68,000 codes, compared to approximately 13,000 ICD-9-CM codes. ICD-10-CM codes have the potential to reveal more about quality of care, so that data can be used in a more meaningful way to better understand complications, better design clinically robust algorithms, and better track the outcomes of care. ICD-10-CM incorporates greater specificity and clinical detail to provide information for clinical decision-making and outcomes research.