A gold color metal and enamel device 1 3/16 inches (3.02 cm) in width overall consisting of a gold demi-sun of eleven gold rays with ends pointed (five rays flush and six alternate rays depressed) each of the three center (flush) rays charged with a maroon five-pointed star, in base in front of the sun, a maroon enamel triangle bearing a white cross, within a maroon circular scroll inscribed, "CARE FOR THOSE WHO SERVE" in gold letters, the ends terminating at side and parallel with base of triangle.

The three stars symbolize the participation in the Ardennes-Alsace, Rhineland and Central Europe campaigns, World War II.  The rising sun alludes to service in the Far East (Vietnam), and the rays to the healing power of the sun.  The triangle charged with the white cross simulates the silhouette of a field hospital (tent) and alludes to the good care and medical achievements of the unit.  The "THREE" stars with the "ELEVEN" rays further distinguishes the numerical designation of the 311th Field Hospital.  Maroon and white are colors used by the Medical Department.

The distinctive unit insignia was approved on 13 June 1969.