Investigate the history of coding and identify the purpose of the ICD coding system. What is the significance of its use?

Investigate the history of coding and identify the purpose of the ICD coding system. What is the significance of its use? What brought about the change from ICD-9 to ICD-10 and how does the ICD-10 system affect the organization and the consumer? What systematic changes do you foresee in the next 10-20 years?