NHS Boards provide Primary Care OOH services for patients when their registered GP Practice is closed. Scottish Government commissioned the National Services Scotland now Public Health Scotland to develop and introduce a dataset to collect information on GP Out of Hours patients across Scotland. National data collection began in April 2014. Data on patients seen by GP Out of Hours (OOH) services across Scotland are collected and maintained by PHS in the national data warehouse known as the GP OOH datamart. Data is collected on local IT system (Adastra), then extracted and submitted to the DataMart on a weekly basis.