Dr Koh Li Wearn graduated with Honours from the University of Cambridge Clinical School, United Kingdom. She completed her early basic postgraduate medical training in Leeds and Sheffield, UK and was a locum service registrar in Rheumatology in Leicester, UK before commencing Specialist Registrar training in Rheumatology in the West Midlands rotation in the UK. She was Consultant Rheumatologist at the University Hospitals Birmingham NHS Foundation Trust and honorary consultant to both the Royal Orthopaedic Hospital, Birmingham and the Birmingham Women's Hospital prior to her current appointment in Tan Tock Seng Hospital, Singapore.

Dr Koh is passionate about teaching, with involvement ranging from public education, pre-university and medical students to inter-specialty medical, nursing and allied health trainees and colleagues. She was a clinical core faculty member of the NHG Health Rheumatology Residency Programme at its inception and was Programme Director from January 2019 to June 2025. She is also Clinical Senior Lecturer at the Yong Loo Lin School of Medicine, and Adjunct Assistant Professor at the Lee Kong Chian School of Medicine. She has been involved in training and supervision of advanced practice nurses and prescribing pharmacist in Rheumatology. She has also been the Co-chair of the NHG Health Residency Wellness Committee.

Dr Koh is the TTSH site Principal Investigator for the Singapore National Biologics Register – a collaborative effort between NHG Health, NUHS and SingHealth institutions. She is also a co-investigator in various other research initiatives within the department.