Checking into the M331 files, I find two physicians who entered in service as Contract Surgeons at the rate of pay of $80/month.
Blevins, Alfred Charles [Albert Carter], Ass’t Surgeon, born May 27, 1831, Rhea Co., served twelve months as 1st Lt. in 26th Tenn., then made Assistant Surgeon of the 43rd Tennessee for an additional 12 months when appointed Surgeon of the 3rd Tenn., appears present on November Regimental Return dated December 2, 1862 at Lenoirs, Tenn., began study of medicine age 21 under Dr. John M. Lillard, Decatur, Meigs Co. for one year, then read medicine under Dr. John Hoyal of Washington, Rhea Co. for three years, studied at the Medical University of Nashville receiving diploma as Doctor of Medicine July 4, 1861, postwar located five miles southwest of Decatur and began the practice of medicine in connection with a farming interest, moved 1883 to Dayton entering on a large practice, married Virginia Catharine Chatten May 1871 which union produced four children, filed Tennessee pension S2313 November 15, 1899, rejected, not wounded in war, died June 25, 1905 at Dayton, widow Virginia C. Blevins filed pension W2980 November 29, 1909, attested by M. V. Armstrong and V. C. Allen, 3rd Tenn., accepted (M268 Roll 290, 162)
A. C. Blevins, appointed Surgeon 3rd Tennessee, October 28, 1862 to take rank as of July 16, 1862, dropped May 31, 1864 “Rejected by Army Medical Board” [M331, Roll 25]
Then, we have another who originally enrolled as a Private.
Gilbert, Edwin D., Ass’t. Surgeon, Co. D, 43rd Tennessee, age 33, enlisted November 1, 1861 at Decatur, Tenn. as Pvt., appointed Assistant Surgeon to the 43rd Tennessee on February 17, 1862 to rank from December 14, 1861, resigned by reason of disability November 19, 1862 , successor W. B. Johnston (M268 Roll 291) [see p. 320, Register of the Adjutant General of the Confederacy]
[M331, Roll 106]