Initially all I found was that too but if you check the "Soldiers and Sailors" website and instead of a state, choose "Confederate Troops" you get this entry:
Regiment Name: General and Staff Officers, Corps, Division and Brigade Staffs, Non-com. Staffs and Bands, Enlisted Men, Staff Departments, C.S.A.
Side: Confederate
Company: (blank)
Soldier's Rank_In: Surg.
Soldier's Rank_Out: (blank)
Film Number: M818 roll 19
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Does this mean he was assigned to no regiment? perhaps in a hospital?