Richard, I am only a hobbyist, but I found some info online that might be helpful. It would appear that the division med unit was the 46th Armored Medical Battalion. It would seem reasonable to assume that elements of that unit would have been in support of Co. B, 8th TB on that date.
There is a web site dedicated to the 4th AD with contacts, etc, that might be able to help you. The address for that site is: