Strike action will be taking place from 7am Saturday 24 February 2024 to Thursday 28 February 2024. Please continue to attend your appointments unless you are contacted and told otherwise.

The strike action may mean our A&E is a lot busier than usual, which means the waiting times will be longer. If you need help which is not life threatening, please use 111, Pharmacies, GPs or Urgent Treatment Centres. Thank you for your understanding during this period.

Key clinical staff


David Chadwick - Consultant Endocrine and General Surgeon

Profile coming soon.


Ioannis Christakis - Consultant Endocrine and General Surgeon

MD MSc MSc(Surg) FRCS(Eng) FEBS(Endo) PhD

Ioannis Christakis is a board-certified and Fellowship trained Endocrine and General Surgeon. He is registered in the Specialist Registry of GMC in General Surgery from 2012 (GMC number: 7031590). He is a Fellow of the Royal College of Surgeons of England and of the European Board of Endocrine Surgery. He was appointed as a Consultant Endocrine and General Surgeon in NUH Trust in 2019.

He manages both benign and complex cancer cases and performs operations for the entire spectrum of Endocrine Surgery diseases including minimally invasive and oncologic operations. He has a special interest in parathyroid disorders and Multiple Endocrine Neoplasia syndromes.

He trained in Endocrine Surgery in MD Anderson Cancer Centre (Houston, USA) Oxford University Hospital NHS Trust, King’s College Hospital NHS Trust and University College London Hospital NHS Trust.

He has a completed a PhD degree in the Department of Endocrinology of Imperial College London and continues to be actively involved in basic science and clinical research. He has published numerous studies in peer-reviewed journals and is the author of several book chapters.