Mason Web has him born March 1823. Findagrave has his birth as Oct. 1, 1823.

Father: Dr. Richard Chichester Mason (1793-1868)
Mother: Lucy Bolling Randolph (1796-1861)
01/10/1843 - Brother, William Pinckney Mason, born in Fairfax Co., VA
1842-1843 - Attended 1st course, University of Pennsylvania, Medical Department, Philadelphia, PA
1843-1844 - Attended 2nd course, University of Pennsylvania, Medical Department, Philadelphia, PA
1844 - M.D. degree, University of Pennsylvania, Medical Department, Philadelphia, PA (from: Virginia; thesis: "Scarlatina")
1847 - Asst. Surgeon, Store ship Relief, U. S. Navy
1847 - Asst. Surgeon, U. S. Naval Hospital, Pensacola, FL
1848 - Asst. Surgeon, Sloop Warren, Pacific Squadron, U. S. Navy
1850 - Asst. Surgeon, Sloop Warren, Pacific Squadron, U. S. Navy
1854 - Asst. Surgeon, Sloop Levant, Mediterranean Squadron, U. S. Navy
01/14/1858 - Surgeon, Sloop Marion, African Squadron, U. S. Navy
1860 - Surgeon, U. S. Navy
11/20/1860 - Married, Lavinia Randolph Deas (b. ~1836 in NY- d.1898), Trinity Church, Ulster Co., NY [Source: The New York Times, Nov. 24, 1860]
11/29/1860 - Practiced medicine with his father, Richard, and specialized in surgery, Fairfax Co., VA (lived with parents - indexed in the 1860 U.S. Census as Randolph F. Mason)
05/10/1861 - Resigned from the U.S. Navy and name stricken from the rolls
06/14/1861 - Appointed Surgeon, Confederate States Navy
1861 - Surgeon, C.S.S. Jamestown
11/18/1861 - Mother, Lucy, died in Charles City Co., VA
1861-1862 - Surgeon, Richmond Station, Richmond, VA, Confederate States Navy
08/09/1862 - Died, White Sulphur Springs, Surry Co., NC (buried: Hollywood Cemetery, Richmond, VA)
08/12/1862 - Funeral, St. Paul's Church, Richmond, VA
03/09/1863 - Birth of son, Randolph Fitzhugh Mason, Jr. (1863-1952), Richmond, VA
1868 - Father, Richard, died in Fairfax Co., VA
07/14/1870 - Widow, lived in Fauquier Co., VA, with son, Randolph, and with her sister, Mary C. Deas
03/26/1952 - Death of son, Randolph, Lower Merion Township, Montgomery Co., PA

Note: A brother, William Pinckney Mason, was also a Confederate States Navy Officer.

Scott Hutchison, Chris Ferguson, and Terry Foenander provided input to this biography.

This biographical sketch is from:
Hambrecht, F.T. & Koste, J.L., Biographical
register of physicians who served the
Confederacy in a medical capacity.
01/29/2017. Updated 05/04/2020.
Unpublished database.