In 1887 he was appointed honorary physician to the queen.

He was appointed honorary physician to the President of India during 1977-1982 and again from 1987 to 1992.

Additionally, honorary physicians and surgeons are appointed from the armed forces.

He was for several years honorary physician to the Adelaide Children's hospital.

Christophers was also an honorary physician to King George V from 1927 to 1930.

He was appointed an honorary physician to King George VI in 1937.

He was appointed honorary physician to the king in Ireland in 1919 and was subsequently university pro-chancellor.

He was also honorary physician to the Governor-General from 1 July 1939 to 11 February 1943.

From 1882 to 1912 he was honorary physician to the Adelaide hospital, and then honorary consulting physician.

In 1919, The Adelaide Children's Hospital advertised for honorary physicians.