Dr Lydia Seetoh is a Consultant in the Department of General Medicine at Tan Tock Seng Hospital. She graduated from the National University of Singapore and subsequently obtained a Master of Medicine (Internal Medicine) from NUS and Membership of the Royal College of Physicians (United Kingdom). She completed specialist training in Advanced Internal Medicine under the NHG Health.

Dr Lydia is involved in both undergraduate and post graduate medical education. She helms the Continuing Medical Education Program for the Department of General Medicine. She is also a Clinical Teacher for the Yong Loo Lin School of Medicine, and an Adj Lecturer for the Lee Kong Chian School of Medicine.

She attained the TTSH Top 20 Teachers Award in 2022.