The medical administration of The Toronto Hospital (TTH) is the responsibility of the Medical Advisory Committee (MAC), also referred to as the Medical Advisory Board (MAB). The MAB of TTH succeeded the MAB of the Toronto General Hospital when TGH merged with the Toronto Western Hospital in 1986 to form The Toronto Hospital.

Dr. P. Garfinkel (1986-1989), Dr. W. McIlroy (1989-1991), Dr. W. Francombe (1991-1996) and Dr. John R. Wright (1996- ) have served as TTH MAC Chair.

The Medical Advisory Board (MAB) of the Toronto General Hospital (TGH) was established in 1876, under the authority of the Medical Superintendent and was responsible for the administration of all medical services and facilities at the hospital until the TGH’s merger with the Toronto Western Hospital in 1986 to form The Toronto Hospital (TTH). Following the merger, the MAB of the TGH was succeeded by the MAB of the TTH.

From time to time the MAB of the TGH created various standing committees with responsibility for fulfilling specific functions related to the medical management of the hospital.

Although its composition frequently changed, the MAB of the TGH was generally composed of the heads of the various medical, surgical and clinical departments, with additional members drawn from these and other hospital departments. The TGH chief executive officer was an ex-officio member of the MAB.