Explain the purpose and of icd-10-cm coding system including reasons for the transaction from icd-9 vol.3

The purpose:  (ICD-10), which was implemented for mortality coding and classification from death certificates in the U.S.  It is used or medical diagnoses based on WHO's ICD-10 and the ICD-10-CM replaced ICD-9-CM.

Transitioning:  ICD-9-CM was used since 1979 (which needed a change) and it was no long clinically accurate, it limited data about patients' medical conditions and hospital inpatient procedures, number of available codes limited, coding structure was restrictive.  

Code set differences

Explanation:

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