National Public Health Laboratory (NPHL), one of the bureaus under National Institute of Public Health (NIPH) is a national reference laboratory assigned by Cambodia Ministry of Health. NPHL provides Out Patient Department (OPD), Hematology, Biochemistry, Immunology, Virology, Microbiology services and Quality Assurance. The NPHL implements laboratory improvement through the laboratory quality management system (LQMS) training program in several provincial laboratories. In addition, NPHL is preparing to apply for the ISO 15189 accreditation in the current year.