|  K31 |  | Other diseases of stomach and duodenum   | 
	
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		|  K31.0 |  | Acute dilatation of stomach |  
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| Acute distention of stomach |  |  | 
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		|  K31.1 |  | Adult hypertrophic pyloric stenosis |  
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| Pyloric stenosis NOS |  
		| Excludes1 | congenital or infantile pyloric stenosis (Q40.0) 
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		| age | Adult: [15-124] 
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		|  K31.2 |  | Hourglass stricture and stenosis of stomach |  
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		| Excludes1 | congenital hourglass stomach (Q40.2) hourglass contraction of stomach (K31.89)
 
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		|  K31.3 |  | Pylorospasm, not elsewhere classified |  
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		| Excludes1 | congenital or infantile pylorospasm (Q40.0) neurotic pylorospasm (F45.8)
 psychogenic pylorospasm (F45.8)
 
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		|  K31.4 |  | Gastric diverticulum |  
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		| Excludes1 | congenital diverticulum of stomach (Q40.2) 
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		|  K31.5 |  | Obstruction of duodenum |  
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| Constriction of duodenum |  | Duodenal ileus (chronic) |  | Stenosis of duodenum |  | Stricture of duodenum |  | Volvulus of duodenum |  
		| Excludes1 | congenital stenosis of duodenum (Q41.0) 
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		|  K31.6 |  | Fistula of stomach and duodenum |  
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| Gastrocolic fistula |  | Gastrojejunocolic fistula |  
		| CodeAlso | , if applicable, disruption of internal operation (surgical) wound (T81.32-) 
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		|  K31.7 |  | Polyp of stomach and duodenum |  
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		| Excludes1 | adenomatous polyp of stomach (D13.1) 
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		|  K31.8 |  | Other specified diseases of stomach and duodenum |  |  |  | 
	
		|  K31.81 |  | Angiodysplasia of stomach and duodenum |  |  |  | 
	
		|  K31.811 |  | Angiodysplasia of stomach and duodenum with bleeding |  |  |  |  | 
	
		|  K31.819 |  | Angiodysplasia of stomach and duodenum without bleeding |  
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| Angiodysplasia of stomach and duodenum NOS |  |  |  |  |  |  | 
	
		|  K31.82 |  | Dieulafoy lesion (hemorrhagic) of stomach and duodenum |  
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		| Excludes2 | Dieulafoy lesion of intestine (K63.81) 
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		|  K31.83 |  | Achlorhydria |  |  |  |  | 
	
		|  K31.84 |  | Gastroparesis |  
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		|  K31.89 |  | Other diseases of stomach and duodenum |  |  | 
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		|  K31.9 |  | Disease of stomach and duodenum, unspecified |  | 
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		|  K31.A |  | Gastric intestinal metaplasia |  |  |  | 
	
		|  K31.A0 |  | Gastric intestinal metaplasia, unspecified |  
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| Gastric intestinal metaplasia indefinite for dysplasia |  | Gastric intestinal metaplasia NOS |  |  |  |  |  | 
	
		|  K31.A1 |  | Gastric intestinal metaplasia without dysplasia |  |  |  | 
	
		|  K31.A11 |  | Gastric intestinal metaplasia without dysplasia, involving the antrum |  |  |  |  | 
	
		|  K31.A12 |  | Gastric intestinal metaplasia without dysplasia, involving the body (corpus) |  |  |  |  | 
	
		|  K31.A13 |  | Gastric intestinal metaplasia without dysplasia, involving the fundus |  |  |  |  | 
	
		|  K31.A14 |  | Gastric intestinal metaplasia without dysplasia, involving the cardia |  |  |  |  | 
	
		|  K31.A15 |  | Gastric intestinal metaplasia without dysplasia, involving multiple sites |  |  |  |  | 
	
		|  K31.A19 |  | Gastric intestinal metaplasia without dysplasia, unspecified site |  |  |  |  |  | 
	
		|  K31.A2 |  | Gastric intestinal metaplasia with dysplasia |  |  |  | 
	
		|  K31.A21 |  | Gastric intestinal metaplasia with low grade dysplasia |  |  |  |  | 
	
		|  K31.A22 |  | Gastric intestinal metaplasia with high grade dysplasia |  |  |  |  | 
	
		|  K31.A29 |  | Gastric intestinal metaplasia with dysplasia, unspecified |  |  |  |