ICD-10 means the tenth edition is a clinical cataloguing system that went into effect for the U.S. healthcare industry on Oct. 1, 2015, after a series of lengthy delays. Accounting for modern advances in clinical treatment and medical devices, ICD-10 codes offer many more classification options compared to those found in its predecessor, ICD-9. it is important because ICD-10 codes provide more detailed information for measuring healthcare service quality, safety and efficacy. Because better data will be provided via the ICD-10 code set