The insignia was redesignated for the 55th Medical Group on 15 December 1967 .
It was redesignated for the Headquarters and Headquarters Detachment , 55th Medical Battalion on 29 May 1957 .
The insignia was redesignated for the 55th Medical Battalion     on 15 December 1967 .
It was redesignated for the Headquarters and Headquarters Detachment , 55th Medical Battalion on 29 May 1957 .