Stephen Powis is the National Medical Director of NHS England and Professor of Renal Medicine at University College London.

Previously he was Medical Director (and latterly Group Chief Medical Officer) of the Royal Free London NHS Foundation Trust from 2006 to 2018. Professor Powis was also a member of the governing body of Merton Clinical Commissioning Group for five years and a Director of Healthcare Services Laboratories LLP.

He is a past Chairman of the Association of UK Universities (AUKUH) Medical Directors Group and has been a member of numerous national committees and working groups, including the Department of Health Strategic Education Funding Expert Group. He is a past non-executive director of the North Middlesex University Hospital NHS Trust, including a period of eight months as acting chairman.