|  K51 |  | Ulcerative colitis   | 
	
		|  |  | 
	
		| UseAdditionalCode | code to identify any associated fistulas, if applicable: anal fistula (K60.3-)
 anorectal fistula (K60.5-)
 rectal fistula (K60.4-)
 
 |  
		| UseAdditionalCode | code to identify manifestations, such as: pyoderma gangrenosum (L88)
 
 |  
		| Excludes1 | Crohn's disease [regional enteritis] (K50.-) 
 |  | 
|  |  | 
	
		|  K51.0 |  | Ulcerative (chronic) pancolitis |  
		|  |  |  |  |  |  | 
	
		|  K51.00 |  | Ulcerative (chronic) pancolitis without complications |  
		|  |  | 
| Ulcerative (chronic) pancolitis NOS |  |  |  |  |  | 
	
		|  K51.01 |  | Ulcerative (chronic) pancolitis with complications |  |  |  | 
	
		|  K51.011 |  | Ulcerative (chronic) pancolitis with rectal bleeding |  |  |  |  | 
	
		|  K51.012 |  | Ulcerative (chronic) pancolitis with intestinal obstruction |  |  |  |  | 
	
		|  K51.013 |  | Ulcerative (chronic) pancolitis with fistula |  |  |  |  | 
	
		|  K51.014 |  | Ulcerative (chronic) pancolitis with abscess |  |  |  |  | 
	
		|  K51.018 |  | Ulcerative (chronic) pancolitis with other complication |  |  |  |  | 
	
		|  K51.019 |  | Ulcerative (chronic) pancolitis with unspecified complications |  |  |  | 
|  |  | 
	
		|  K51.2 |  | Ulcerative (chronic) proctitis |  |  |  | 
	
		|  K51.20 |  | Ulcerative (chronic) proctitis without complications |  
		|  |  | 
| Ulcerative (chronic) proctitis NOS |  |  |  |  |  | 
	
		|  K51.21 |  | Ulcerative (chronic) proctitis with complications |  |  |  | 
	
		|  K51.211 |  | Ulcerative (chronic) proctitis with rectal bleeding |  |  |  |  | 
	
		|  K51.212 |  | Ulcerative (chronic) proctitis with intestinal obstruction |  |  |  |  | 
	
		|  K51.213 |  | Ulcerative (chronic) proctitis with fistula |  |  |  |  | 
	
		|  K51.214 |  | Ulcerative (chronic) proctitis with abscess |  |  |  |  | 
	
		|  K51.218 |  | Ulcerative (chronic) proctitis with other complication |  |  |  |  | 
	
		|  K51.219 |  | Ulcerative (chronic) proctitis with unspecified complications |  |  |  | 
|  |  | 
	
		|  K51.3 |  | Ulcerative (chronic) rectosigmoiditis |  |  |  | 
	
		|  K51.30 |  | Ulcerative (chronic) rectosigmoiditis without complications |  
		|  |  | 
| Ulcerative (chronic) rectosigmoiditis NOS |  |  |  |  |  | 
	
		|  K51.31 |  | Ulcerative (chronic) rectosigmoiditis with complications |  |  |  | 
	
		|  K51.311 |  | Ulcerative (chronic) rectosigmoiditis with rectal bleeding |  |  |  |  | 
	
		|  K51.312 |  | Ulcerative (chronic) rectosigmoiditis with intestinal obstruction |  |  |  |  | 
	
		|  K51.313 |  | Ulcerative (chronic) rectosigmoiditis with fistula |  |  |  |  | 
	
		|  K51.314 |  | Ulcerative (chronic) rectosigmoiditis with abscess |  |  |  |  | 
	
		|  K51.318 |  | Ulcerative (chronic) rectosigmoiditis with other complication |  |  |  |  | 
	
		|  K51.319 |  | Ulcerative (chronic) rectosigmoiditis with unspecified complications |  |  |  | 
|  |  | 
	
		|  K51.4 |  | Inflammatory polyps of colon |  
		|  |  | 
	
		| Excludes2 | adenomatous polyp of colon (D12.6) polyposis of colon (D12.6)
 polyps of colon NOS (K63.5)
 
 |  |  |  |  | 
	
		|  K51.40 |  | Inflammatory polyps of colon without complications |  
		|  |  | 
| Inflammatory polyps of colon NOS |  |  |  |  |  | 
	
		|  K51.41 |  | Inflammatory polyps of colon with complications |  |  |  | 
	
		|  K51.411 |  | Inflammatory polyps of colon with rectal bleeding |  |  |  |  | 
	
		|  K51.412 |  | Inflammatory polyps of colon with intestinal obstruction |  |  |  |  | 
	
		|  K51.413 |  | Inflammatory polyps of colon with fistula |  |  |  |  | 
	
		|  K51.414 |  | Inflammatory polyps of colon with abscess |  |  |  |  | 
	
		|  K51.418 |  | Inflammatory polyps of colon with other complication |  |  |  |  | 
	
		|  K51.419 |  | Inflammatory polyps of colon with unspecified complications |  |  |  | 
|  |  | 
	
		|  K51.5 |  | Left sided colitis |  
		|  |  |  |  |  |  | 
	
		|  K51.50 |  | Left sided colitis without complications |  
		|  |  |  |  |  |  |  | 
	
		|  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 |  |  |  | 
|  |  | 
	
		|  K51.8 |  | Other ulcerative colitis |  |  |  | 
	
		|  K51.80 |  | Other ulcerative colitis without complications |  |  |  |  | 
	
		|  K51.81 |  | Other ulcerative colitis with complications |  |  |  | 
	
		|  K51.811 |  | Other ulcerative colitis with rectal bleeding |  |  |  |  | 
	
		|  K51.812 |  | Other ulcerative colitis with intestinal obstruction |  |  |  |  | 
	
		|  K51.813 |  | Other ulcerative colitis with fistula |  |  |  |  | 
	
		|  K51.814 |  | Other ulcerative colitis with abscess |  |  |  |  | 
	
		|  K51.818 |  | Other ulcerative colitis with other complication |  |  |  |  | 
	
		|  K51.819 |  | Other ulcerative colitis with unspecified complications |  |  |  | 
|  |  | 
	
		|  K51.9 |  | Ulcerative colitis, unspecified |  |  |  | 
	
		|  K51.90 |  | Ulcerative colitis, unspecified, without complications |  |  |  |  | 
	
		|  K51.91 |  | Ulcerative colitis, unspecified, with complications |  |  |  | 
	
		|  K51.911 |  | Ulcerative colitis, unspecified with rectal bleeding |  |  |  |  | 
	
		|  K51.912 |  | Ulcerative colitis, unspecified with intestinal obstruction |  |  |  |  | 
	
		|  K51.913 |  | Ulcerative colitis, unspecified with fistula |  |  |  |  | 
	
		|  K51.914 |  | Ulcerative colitis, unspecified with abscess |  |  |  |  | 
	
		|  K51.918 |  | Ulcerative colitis, unspecified with other complication |  |  |  |  | 
	
		|  K51.919 |  | Ulcerative colitis, unspecified with unspecified complications |  |  |  |