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