A silver color metal and enamel device 1 1/8 inches (2.86 cm) in height overall, consisting of a silver Maltese cross with a vertical maroon rod of Aesculapius topped by a demi-fleur-de-lis all extending beyond at top and base and all with a maroon scroll conjoined and circumscribed across base and contorted behind the lateral arms terminating in the upper angles of the cross; bearing the inscription across the base "SUMMI ORDINIS" in silver letters.
Maroon and white (silver) are the colors of the Army Medical Department. The Maltese cross, used by the Army Medical Department during the late 19th century, symbolizes the historic traditions of all medical activities in the unit. The demi-fleur-de-lis is used to represent France where the unit participated in the Northern France campaign during World War II. The rod of Aesculapius refers to the art of healing while the motto "Of the Highest Order" reflects both the ideals and the dedication of the medical profession and the mission of the 348th General Hospital.
The distinctive unit insignia was approved on 13 October 1969.