|  K59 |  | Other functional intestinal disorders   | 
	
		|  |  | 
	
		| Excludes1 | change in bowel habit NOS (R19.4) intestinal malabsorption (K90.-)
 psychogenic intestinal disorders (F45.8)
 
 |  
		| Excludes2 | functional disorders of stomach (K31.-) 
 |  | 
|  |  | 
	
		|  K59.0 |  | Constipation |  
		|  |  | 
	
		| Excludes1 | fecal impaction (K56.41) 
 |  
		| Excludes2 | incomplete defecation (R15.0) 
 |  |  |  |  | 
	
		|  K59.00 |  | Constipation, unspecified |  |  |  |  | 
	
		|  K59.01 |  | Slow transit constipation |  |  |  |  | 
	
		|  K59.02 |  | Outlet dysfunction constipation |  |  |  |  | 
	
		|  K59.03 |  | Drug induced constipation |  
		|  |  | 
	
		| UseAdditionalCode | code for adverse effect, if applicable, to identify drug (T36-T50 with fifth or sixth character 5) 
 |  |  |  |  |  | 
	
		|  K59.04 |  | Chronic idiopathic constipation |  
		|  |  |  |  |  |  |  | 
	
		|  K59.09 |  | Other constipation |  
		|  |  |  |  |  | 
|  |  | 
	
		|  K59.1 |  | Functional diarrhea |  
		|  |  | 
	
		| Excludes1 | diarrhea NOS (R19.7) irritable bowel syndrome with diarrhea (K58.0)
 
 |  |  | 
|  |  | 
	
		|  K59.2 |  | Neurogenic bowel, not elsewhere classified |  | 
|  |  | 
	
		|  K59.3 |  | Megacolon, not elsewhere classified |  
		|  |  | 
| Dilatation of colon |  
		| CodeFirst | , if applicable (T51-T65) to identify toxic agent 
 |  
		| Excludes1 | congenital megacolon (aganglionic) (Q43.1) megacolon (due to) (in) Chagas' disease (B57.32)
 megacolon (due to) (in) Clostridium difficile (A04.7-)
 megacolon (due to) (in) Hirschsprung's disease (Q43.1)
 
 |  |  |  |  | 
	
		|  K59.31 |  | Toxic megacolon |  |  |  |  | 
	
		|  K59.39 |  | Other megacolon |  
		|  |  |  |  |  | 
|  |  | 
	
		|  K59.4 |  | Anal spasm |  
		|  |  |  |  | 
|  |  | 
	
		|  K59.8 |  | Other specified functional intestinal disorders |  |  |  | 
	
		|  K59.81 |  | Ogilvie syndrome |  
		|  |  | 
| Acute colonic pseudo-obstruction (ACPO) |  |  |  |  |  | 
	
		|  K59.89 |  | Other specified functional intestinal disorders |  
		|  |  | 
| Atony of colon |  | Pseudo-obstruction (acute) (chronic) of intestine |  |  |  | 
|  |  | 
	
		|  K59.9 |  | Functional intestinal disorder, unspecified |  |