The National Center for AIDS/HIV, Dermatology and STD (NCHADS) is a national center in Cambodia which provides many public health services to those affected by HIV. Since HIV treatment is a lifetime treatment and a complicated a process, having data of patient history treatment is very important. Before having a system, all medical records were kept using paper based systems, making data difficult to manage. InSTEDD iLab has been working on creating databases to store patient information and their medical records called “Master Patient Index”. HIV patients will register to the system with their fingerprint. A biometric device will identify a user every he or she gets treatment, and their data is automatically updated. The data of HIV patients is very sensitive so all measured are taken to make sure that such data is private. The system provides access to management level users to take action when there is an outbreak of HIV cases as well. The system is currently used in Battambang, Banteay Meanchey and Siem Reap.