The electronic Mental Health Management Information System (eMHMIS) was implemented in Sri Lanka to improve the timeliness, accuracy, and quality of mental health data management. This system captures essential facility-level information such as client referrals, mental health disorders, human resources, and performance monitoring. By adhering to a minimal data set principle and eliminating duplicate entries, eMHMIS enhances the efficiency of data collection. Operational since October 2017 and based on the District Health Information Software 2 (DHIS Version 2), it addresses the critical need for managing outpatient mental health information effectively, focusing on both mental health and other health areas.