Does anyone know what the initials P.A.C.S. after the name of a Surgeon mean? An 1892 inspection report of General Hospital 27 in Richmond stated the hospital was opened by Surgeon G.W. Briggs P.A.C.S. (a relative of mine) He went on to serve at Chancellorsville. Later the report stated that Surgeon G. S. west C.S.A. was in charge.