If hospitals in a country do not adopt the ICD standard for classifying disease diagnoses, several repercussions could arise. Firstly, there would be a significant lack of standardization and consistency across healthcare facilities, making it challenging to compare and share health data effectively. This could compromise national and international data interoperability. Without a unified system, health analytics and research could be hindered, making it difficult to identify health trends, conduct epidemiological studies, and develop public health initiatives. Moreover, the billing and insurance claim processes could become chaotic, leading to disputes and increased administrative overhead. Additionally, public health surveillance, especially during outbreaks or pandemics, would be less effective, as accurately tracking and responding to diseases would be compromised.