Tan Chorh Chuan (Chinese: 陈祝全; pinyin: Chén Zhùquán) is a former president of the National University of Singapore (NUS), serving from December 2008 to December 2017. Tan is currently a University Professor at the National University of Singapore. Tan was recognised for his leadership contributions to overcoming the Severe acute respiratory syndrome (SARS) epidemic in 2003, while serving as the Director of Medical Services in Ministry of Health (MOH) from 2000 to 2004. Since January 2018, he has been the Chief Health Scientist at MOH and Executive Director of MOH's new Office for Healthcare Transformation, driving transformation of Singapore's healthcare system.