A gold color metal and enamel device 1 3/16 inches (3.02 cm) in height overall consisting of a white disc bearing a maroon quatrefoil throughout, all behind a scarlet Greek cross (with arms extended slightly beyond the white disc) surmounted by a (superimposed) gold griffin passant.
The griffin, part eagle and part lion, in heraldry signifies a strong supporter, exceedingly alert and thus symbolizes the distinguished leadership Major General Silas Beach Hays, after whom Silas B. Hays General Hospital is named, provided to medical affairs of the Army. The wings of the griffin refer to the airlifting of medical supplies during World War II, and the perfected air evacuation system of routing Korean War casualties devised by General Hays. The quatrefoil in heraldry means substance, understanding, will and wisdom, all requirements of a Medical Activity, while the disc symbolizes complete mission. The Greek cross is a symbol of aid and assistance, while maroon and white are colors used by the Medical Department.
The distinctive unit insignia was originally approved for the U.S. Army Hospital, Fort Ord on 15 October 1970. It was redesignated for the Silas B. Hays Army Hospital on 17 May 1972. The insignia was redesignated for the U.S. Army Medical Department, Fort Ord on 12 September 1973.