When you first start using HICSOAP, all of your patients will be visible in the patient list. So it's reasonable to continue to expect all of your patients to always be visible in this list. However, at some point when the number of patients exceeds some magical threshold, this will no longer be the case. This is because to do so with extremely large data sets is slow. So, to find a patient it's necessary to type some of their information in the search boxes like LAST NAME.