K61 | 
		  | 
		Abscess of anal and rectal regions   | 
	
	
		 |  | 
		
	
		| Includes | 
		abscess of anal and rectal regions cellulitis of anal and rectal regions
  | 
	 
 
 | 
	
 |  | 
	
		 K61.0 | 
		  | 
		Anal abscess | 
	 
	
		 |  | 
		
| Perianal abscess |  	
		| Excludes2 | 
		intrasphincteric abscess (K61.4)
  | 
	 
 
 | 
	   | 
 |  | 
	
		 K61.1 | 
		  | 
		Rectal abscess | 
	 
	
		 |  | 
		
| Perirectal abscess |  	
		| Excludes1 | 
		ischiorectal abscess (K61.39)
  | 
	 
 
 | 
	   | 
 |  | 
	
		 K61.2 | 
		 | 
		Anorectal abscess | 
	 
  | 
 |  | 
	
		 K61.3 | 
		 | 
		Ischiorectal abscess | 
	 
 |  | 
	
		 K61.31 | 
		 | 
		Horseshoe abscess | 
	 
  |   |  | 
	
		 K61.39 | 
		  | 
		Other ischiorectal abscess | 
	 
	
		 |  | 
		
| Abscess of ischiorectal fossa |  | Ischiorectal abscess, NOS |   
 | 
	   |    | 
 |  | 
	
		 K61.4 | 
		  | 
		Intrasphincteric abscess | 
	 
	
		 |  | 
		
 | 
	   | 
 |  | 
	
		 K61.5 | 
		 | 
		Supralevator abscess | 
	 
  |