K51.2Non-Billable (Header)Ulcerative (chronic) proctitisChild CodesK51.20Ulcerative (chronic) proctitis without complicationsHCC 81K51.21Ulcerative (chronic) proctitis with complicationsCode Hierarchy└K51Ulcerative colitis└K51.2Ulcerative (chronic) proctitis└K51.2Ulcerative (chronic) proctitis