What are the requirements for a screening visit?

There are no specific study requirements for a screening visit, but it is recommended to include one. Not every study contains a screening visit. For example, there are rollover studies, enrollment (or registration) studies where subjects are screened in an external system and do not require you to create a screening visit in the system. However, by not including a screening visit, a subject's status may not be able to progress within the study as expected if they are not screened accordingly.