A gold color metal and enamel device 1 1/4 inches (3.18cm) in height overall consisting of a white star surmounted by a heraldic water bouget, the upper part light green and the lower part with three wavy bands of alternating blue and white above and between the two points of the base of the star a segment of an arc divided into three sections, the upper section an acute angle with equal sides gold and the lower section divided from right to left blue and red (simulating the Armor shoulder sleeve insignia), issuing from opposite corners of the horizontal points of the star two gold demi-serpents, their heads curving inwards to rounded top of rod at apex of the star. Encircling the device in base and terminating at opposite sides of the horizontal points of the star, a maroon scroll bearing the inscription "CARE AND CONCERN" in gold letters.
Maroon and white are the colors used for Medical organizations. The star refers to Texas where the organization and Darnall General Hospital are located. The heraldic water bouget was used by armies in the Middle Ages to carry water. It symbolizes the historical significance of Carl Roger Darnall's contribution to medical science - the value of liquid chlorine in the purification of water. The light green area represents chlorine; the blue wavy bands are symbolic of water; the two together represent the universal use of chlorinated water. The serpents refer to the healing arts and the triangular segment, simulating the Armored Force insignia, denotes the medical support rendered at the largest permanent Armored Post in the United States.
The distinctive unit insignia was originally approved for the U.S. Darnell Army Hospital on 9 September 1969. It was redesignated for the U.S. Army Medical Department Activity, Fort Hood on 30 August 1973. The insignia was redesignated effective 1 May 2006, for the Carl R. Darnall Army Medical Center with the description updated.