It was redesignated for the Headquarters and Headquarters Detachment , 55th Medical Battalion on 29 May 1957 .
The distinctive unit insignia was originally approved for the 55th Medical Battalion on 20 June 1941 .
Medical Battalion was redesignated for the Headquarters and Headquarters Detachment , Medical Battalion     on 29 May 1957 .
The distinctive unit insignia was originally approved for the 55th Medical Battalion on 20 June 1941 .