ShieldPer bend Argent and Celeste (Oriental Blue) a griffin segreant holding in its talons a serpent erect and respectant Or.
CrestThat for the regiments and separate battalions of the Oregon Army National Guard: From a wreath Argent and Celeste (Oriental Blue) a demi-disc Gules charged with the setting sun with twelve light rays Or (the shoulder sleeve insignia of the 41st Division), behind a beaver sejant Proper.
MottoADVANTAGE THRU KNOWLEDGE.
ShieldThe symbolism, attributed to the 641st Military Intelligence Battalion, for whom the coat of arms was originally designed, is as follows: The winged griffin, symbol of vigilance and strength, combats a serpent, representing the antagonist forces with which the 641st Military Intelligence Battalion must contend. The colors blue and gold are taken from the flag of Oregon, home state of the Battalion. White represents Mount Hood, the state's tallest peak. The colors blue and silver gray (argent) are also traditionally associated with Military Intelligence.
CrestThe crest is that of the Oregon Army National Guard.
The coat of arms was originally approved for the 641st Military Intelligence Battalion on 13 February 1984. It was redesignated for the 641st Medical Battalion on 13 December 1995. The insignia was amended to correct the blazon on 12 September 1996.