John, Maybe this sort of listing from the Yankees could be used. Just noticed the source for the LSU site at the very bottom of the page.
In addition to its dead and wounded from battle and disease, the Union listed:
Deaths in Prison 24,866
Drowning 4,944
Accidental deaths 4,144
Murdered 520
Suicides 391
Sunstroke 313
Military executions 267
Killed after capture 104
Executed by enemy 64
Unclassified 14,155
Source: "The Civil War, Strange and Fascinating Facts," by Burke Davis
George