ICD-10 codes are different from ICD-9 codes. ICD-10 has a completely different structure from ICD-9. Currently, ICD-9 codes are mostly numeric and have 3 to 5 digits. ICD-10 codes will be alphanumeric and contain 3 to 7 characters. ICD-10 is more robust and descriptive with "one to many" matches in some instances.
Like ICD-9 codes, ICD-10 codes will be updated every year.
Source: Centers for Medicare & Medicaid Services, www.cms.gov, February 2014