A gold color metal and enamel device 1 1/8 inches (2.86 cm) in height overall consisting of a maroon Greek cross bearing a white heraldic lion passant guardant all in front of a blue-bordered white saltire.
Maroon and white are the colors used for the Army Medical Department. The predecessor hospital's service in World War II, during which it was stationed in Herefordshire, England, is denoted by the white lion passant guardant and the saltire surrounded by blue suggested by the coat of arms of Hereford. Additionally, the saltire connotes a brace for added strength, and the Greek cross is an emblem of medical aid and assistance.
The distinctive unit insignia was originally approved for the 364th General Hospital on 30 September 1971. It was redesignated for the 364th Field Hospital with the description and symbolism revised on 6 July 1994.