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 | 
	 
  |    |    |