i. No standardized case definitions for the diseases among hospitals and different level of medical professionals, data reduntancy
ii. Face challenges in big data analysis for comparing of data, comprehensive management and research purposes, unable to monitor and EWAR system
iii. The above facts will impact on interoperability among institutes and country level ehealth system, increaded workload on data cleansing and verification
iv. If the hospital cannot use ICD standard, it is diffficult in calculating service package purchasing for case defining, management (logistics, financial and insurance)and implementing health economic.
