Born on 11 June 1867, the second son of the Rev John Temperley Grey and Mary Jane McCorquodale, his wife. He was educated at Bristol Grammar School and Bristol Medical School where he won the Committee's gold medal of the Bristol General Hospital in 1889. He then studied at the University of Durham and at the London Hospital, where he held the Lady Haberfield entrance scholarship and the Martyn memorial scholarship in pathology, and won prizes in medicine, midwifery, pathology and anatomy. After serving as prosector and assistant demonstrator of anatomy and physiology at Bristol Medical School, he was for a time assistant physician at the Bristol General Hospital. He served as resident medical officer at Swansea Hospital and later went into practice at Weston-super-Mare, where he returned after a short interval at St Neots. He later moved to Camborne, being medical officer to the hospital there and surgeon to the West Cornwall Miners' Hospital at Redruth. He acted as honorary secretary of the Truro division of the British Medical Association in 1903-04. In 1904 he moved to Corbridge-on-Tyne, in 1907 to Basingstoke, Hants, where he was medical officer to the Cottage Hospital; and in 1908 to Wrexham, Denbighshire, returning shortly to Fordingbridge, Hants. In 1911 he moved to Cheltenham and in 1915 returned to Corbridge, transferring to Newcastle-on-Tyne in 1921. He retired in 1926 to Hexham, Northumberland. He was living at Lenham near Maidstone, Kent, in 1932, but returned to Hexham where he died on 17 December 1940, aged 73. Grey married on 21 October 1896 Hannah Edith Ridley, who died before him, leaving a daughter and a son, Dr Donald Ridley Campbell Grey, MB BS.