A gold color metal and enamel device 1 1/8 inches (2.86 cm) in height overall consisting of a red disc bearing throughout a gold square all within a maroon annulet and all surmounted by a white equilateral triangle, its apex and base coinciding with the diameter of the red disc, and that portion of the triangle overlapping the gold square is of green and bearing a white Greek cross; the annulet inscribed "WE STRIVE TO PRESERVE" in gold letters.
Maroon and white are the colors used for the Army Medical Department, and a cross is emblematic of aid and assistance. Green, the color of the gown of the ancient physician, is symbolic of renewal; a triangle and square represent the physical and mental and their angles equal seven, the total of man's body systems and numerical symbol for health and balance; the annulet simulates a wheel, referring to mobility, and together they represent the overall mission and capabilities of the organization.
The distinctive unit insignia was originally approved for the 129th Surgical Hospital on 3 November 1971. It was redesignated for the 129th Combat Support Hospital on 6 October 1975. The insignia was redesignated for the 129th Evacuation Hospital on 13 September 1979.