A gold color metal and enamel device 1 3/16 inches (3.02cm) in height overall consisting of a white enamel Greek cross in back of a green enamel fleur-de-lis surmounted by a gold crosier issuing from base with crook dexterwise, in base a semi-circular maroon scroll passing under the horizontal arms of the cross and folded back on each side at the top, bearing the inscription "WE PROVIDE THE BEST" in gold letters.

The Greek cross is a symbol of aid and assistance. The fleur-de-lis represents the location of the U.S. Army Medical Department Activity at Fort Johnson, Louisiana in the Kisatchie National Forest. The bishop's staff (crosier) reflects leadership and medical authority of the organization. Green was the color of the medieval academic gowns for medicine, and also the color symbolic of good health, growth, and life. Maroon and white are colors used for the Army Medical Department.

The distinctive unit insignia was originally approved for the U.S. Army Hospital, Fort Polk on 25 Sep 1972.  It was amended to correct the symbolism on 20 Oct 1972.  On 21 Sep 1973 the insignia was redesignated for the U.S. Army Medical Department Activity, Fort Polk. The insignia was redesignated with symbolism revised for the U.S. Army Medical Department activity, Fort Johnson on 3 August 2023.