K51.5 - Left sided colitis
K51.51 - Left sided colitis with complications
K51.511 - Left sided colitis with rectal bleeding
K51.512 - Left sided colitis with intestinal obstruction
K51.513 - Left sided colitis with fistula
K51.514 - Left sided colitis with abscess
K51.518 - Left sided colitis with other complication
K51.519 - Left sided colitis with unspecified complications