We assessed timeliness of diagnosis of asthma before and after the inception of electronic medical record (EMR). The proportions of children with a delay in diagnosis of asthma before and after the inception of EMR were 67.8% and 56.8%, respectively (p = 0.088). A significant proportion of children have delayed diagnosis of asthma, and availability of EMR plays a minimal role in reducing delays in diagnosis of asthma. However, considering the limited statistical power and a potential trend of EMR toward the positive impact on timely diagnosis of asthma, the study results need to be revisited in a larger study.