Maria Rosario Clarissa Singh-Vergeire (born Maria Rosario Clarissa Dumandan Singh) is a Filipino physician and public health official serving as the Officer in Charge of the Department of Health since July 14, 2022, following her appointment by President Bongbong Marcos. She served as an undersecretary as well as the spokesperson of the Department of Health since 2015 under the Benigno Aquino III and Rodrigo Duterte administrations.