Medical Defence Union

Medical Defence Union
Company typePrivate limited company
IndustryProfessional indemnity
Founded23 October 1885 (1885-10-23)
HeadquartersCanary Wharf, London, United Kingdom
Key people
Dr Matthew Lee
(Chief executive)
Dr Paul Riordan-Eva
(President)
Number of employees
420
Websitethemdu.com

The Medical Defence Union (MDU) is one of three major medical defence organisations (MDOs) in the United Kingdom, offering professional medical indemnity for clinical negligence claims and advice provided by medico-legal experts for its members. It is a mutual not for profit organisation.

The MDU was established in 1885 and was the first of its kind in the world. As of January 2022 it has around 200,000 members: doctors, nurses, dentists and other healthcare professionals. The Dental Defence Union (DDU) is the specialist dental division of the MDU.