Mark Christopher Milson Porter,[1] MBE (born 12 November 1962 in Ross-on-Wye, Herefordshire, England) is a GP and medical correspondent for The Times.

He also presents on Radio 4 Case Notes and Inside Health.

Porter is in general practice in Wotton-under-Edge in Gloucestershire and he lives in the Cotswolds with his wife and two daughters (born April 1989 and July 1990).

He grew up in Ross-on-Wye in Herefordshire, and went to the independent schools Monmouth and Wycliffe College.

He also regularly appeared on The Jimmy Young Programme on BBC Radio 2, answering medical questions from listeners.