A silver color metal and enamel device 1 3/16 inches (3.02 cm) in height consisting of a blue five-pointed star with upper point barbed and all points separated by a silver line from center surmounted at center by a silver eight-rayed sun; centered between the lower points of the star a Korean Taeguk (red and blue disc) and arched about and enclosing the star at either side the upper halves of two silver oriental dragons back to back their ears terminating at either side of the point of the star and their claws holding at either side the ends of a semi-circular maroon scroll enclosing the base and inscribed in silver with the words "NON SECUNDUS."
Silver and maroon are the colors of the Army Medical Department. The five segments of the star represent three campaigns in the Pacific theater of World War II and two in the Korean War, the barb on the upper point denoting participation in an assault landing on Leyte in the Philippines. The color blue alludes to the Presidential Unit Citation awarded to the Hospital for service on Papua. The silver Philippine sun at center of the star and the Taeguk symbol below, refer to awards of the Philippine and Korean Presidential Unit Citations respectively. The two dragons, based on sculptured dragons guarding the entrance to a war memorial in Saigon, represent two awards of the Meritorious Unit Commendation earned by the Hospital for service in the Republic of Vietnam. The motto translates to "Not Second."
The distinctive unit insignia was originally approved for the 2d Surgical Hospital on 30 September 1969. It was redesignated for the 502d Surgical Hospital on 28 January 1985.