The Eleanor S. Brockenbrough Library at the Museum of the Confederacy holds a substantial number of hospital ledgers and records. There is an on-line index to their holdings, but the ledgers/records themselves are not posted on-line.

During 1864 and 1865, most South Carolina soldiers around Richmond were hospitalized long term at Jackson Hospital, in the city. My recollection is that the records for Jackson Hospital are very, very sparse. The great probability is that what you find in the Compiled Service Records is going to be pretty much the only source for hospitalizations. Of course, the Palmetto Sharpshooters spent most of June, July, August, and September at Petersburg, but on September 29, 1864, Bratton's Brigade was brought across the James and was stationed on the Peninsula in the neighborhood of Darbytown Road and Charles City Road until just before the fall of Richmond.