The 4th Massachusetts Heavy Artillery lost 2 officers and 23 enlisted men to disease in the Civil War.

1864
August Organized for one year’s service by consolidation of the 17th, 18th, 19th, 20th, 21st, 22nd, 23rd, 24th, 25th, 26th, 27th and 28th Unattached Companies Heavy Artillery.
November 12 Attached to 3rd Brigade, DeRussy’s Division, 22nd Army Corps, Dept. of Washington and garrison duty in the Defenses of Washington, south of the Potomac
1865
June 17 Mustered out