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Explain the hierarchical Structure of ICD-10-CM.

1. Explain the hierarchical Structure of ICD-10-CM. The hierarchical structure of ICD-10-CM is similar to ICD-9-CM in that the first 3 characters of the codes are categorized according to similar traits. The differences between the 2 editions are summarized below: Differences Number of Chapters: ICD-10 - 21 ICD-9 17 Code Structure Alphanumeric, Length = 3-7 characters Numeric, Length = 3-5 characters Differences ICD-10 ICD-9 Number of Chapters 21 17 Code Structure Alphanumeric, Length = 3-7 characters Numeric, Length = 3-5 characters Diseases of the Sensory Organs Ears/eyes separated into own chapter Combined in the Nervous System Diseases Injury Classification According to site (e.g. Arm) According to type (e.g. wound) Placeholder “X” is used when a code has less than 6 characters but a 7th character is required. None V & E Supplement Codes Incorporated into main classification system Available for Assignment Titles Includes full titles for codes Refers the coder back to comm. 4th and 5th digits






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