The National Archives holds patient registers for two Meridian, Miss. hospitals, Way Hospital & Yandell Hospital. http://www.archives.gov/research/guide-fed-records/groups/109.html
James M. Hoyle was appointed Assistant Surgeon, State of Mississippi, on October 28, 1861. He was assigned to duty with 8th Regiment Georgia Infantry in November 20, 1861. He resigned February 3, 1862 but had accepted a position as assistant surgeon later that year and was serving in Meridian or Marion in December of 1862. He may have been a contract surgeon and not a formal member of the military or he may have accepted another commission, at the present, his military status is unclear. He was, nevertheless, present for duty as an assistant surgeon on 15 December 1862. [Henderson, 28] Hoyle was later the Surgeon-in-Charge of the Way Hospital in Guntown, Lee County, Mississippi. Guntown is also on the M&O road
http://www.lauderdalecoms.com/exclusivearticles/marionconfederatecemetery.htm
See also: http://www.mycivilwar.com/facts/csa/hospitals.htm
Ralph Simmons, Jr., born 1843, enlisted August 13, 1861 in Company I, 20th Regt Mississippi Vols. Ralph was wounded July 20, 1864 and listed on Roll of Prisoners of War of divers[1] companies and regiments of the Confederate States Army, surrendered at Citronelle, Alabama, May 4, 1865. Ralph was admitted to Way Hospital, Meridian, Mississippi in March and April 1865. Ralph, Jr. lost a leg about the knee area and he died in 1867 as a result of his wounds. Ralph Simmons, Jr., did not marry.
http://www.nchgs.org/html/confederate_heritage.html