Sir Maurice Alan Cassidy GCVO CB (29 February 1880 – 22 October 1949) was a British medical doctor, physician to the King from 1937 until his own death.
[5] After working there for several years, including two as resident assistant registrar, he was elected in 1913 a fellow of the Royal College of Surgeons and joined the honorary staff of St Thomas'.
[5] During the First World War he spent two years in a Calais hospital, where he contracted pulmonary tuberculosis and had to be repatriated.
In addition to his commitments at St Thomas' he was for some time Physician and Chief Medical Officer of the Metropolitan Police and was knighted C.B.
He delivered the Harveian Oration to the Royal College of Physicians in 1946 on the subject of coronary disease.