His service card shows he was relieved from duty 24 May 1863, so he may have been ill and died at home. The E.M.M. were only activated "as needed"

http://www.sos.mo.gov/TIF2PDFConsumer/DispPDF.aspx?fTiff=/archives/AdjutantGeneral/Civil_War/ServiceCards/s795/1171.tif&Fln=S337110.pdf